Sheena Meredith

The Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) this week recommended new contraindications on the coadministration of the protease inhibitor atazanavir (Reyataz, Bristol-Myers Squibb) with antineoplastic agents encorafenib and ivosidenib (atazanavir may significantly increase blood levels and thus side effects), and with the anticonvulsants carbamazepine, phenobarbital, and phenytoin (which may decrease serum levels of atazanavir). 

The new rules alter sections 4.3 and 4.5 of the summary of product characteristics (SmPC) to reclassify drug–drug interactions with the new contraindications.

Atazanavir is an orally administered drug, used in combination with low-dose ritonavir (Norvir) to boost its pharmacokinetics. It is indicated for the treatment of HIV-1 infected adults and pediatric patients 3 months of age and older in combination with other antiretroviral medicinal products. A combination preparation boosted with cobicistat (Evotaz) is also available.

The drug is an azapeptide HIV-1 protease inhibitor (PI) that selectively inhibits the virus-specific processing of viral Gag-Pol proteins in HIV-1 infected cells, thus preventing formation of mature virions and infection of other cells. This prevents the virus from multiplying and slows the spread of infection. Based on available virological and clinical data from adult patients, no benefit is expected in patients with HIV strains resistant to multiple protease inhibitors (four or more PI mutations).

Therapy with atazanavir is intended to be initiated by a physician experienced in the management of HIV infection, with the choice of atazanavir in treatment-experienced adult and pediatric patients based on individual viral resistance testing and the patient’s treatment history. The standard dose is 300 mg atazanavir taken with 100 mg ritonavir once daily with food.

Atazanavir is already contraindicated in combination or coadministration with a wide variety of other agents:

• Coadministration with simvastatin or lovastatin [statins – risk of increased blood levels with atazanavir].
• Combination with the anti-TB antibiotic rifampicin.
• Combination with the PDE5 inhibitor sildenafil when used for the treatment of pulmonary arterial hypertension only.
• Coadministration with substrates of the CYP3A4 isoform of cytochrome P450 that have narrow therapeutic windows (eg, quetiapine, lurasidone, alfuzosin, astemizole, terfenadine, cisapride, pimozide, quinidine, bepridil, triazolam, oral midazolam, lomitapide, and ergot alkaloids).
• Coadministration with grazoprevir-containing products, including elbasvir/grazoprevir fixed dose combination (hepatitis C drug combination; atazanavir increases its blood levels).
• Coadministration with glecaprevir/pibrentasvir fixed dose combination (hepatitis C drug combination; increased hepatotoxicity due to increased bilirubin concentration).
• Coadministration with products containing St. John’s wort (Hypericum perforatum).

The EMA said detailed recommendations for the use of atazanavir will be described in the updated SmPC, which will be published in the revised European public assessment report after a decision on this change to the marketing authorization has been granted by the European Commission.

A version of this article appeared on Medscape.com.

The Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) this week recommended new contraindications on the coadministration of the protease inhibitor atazanavir (Reyataz, Bristol-Myers Squibb) with antineoplastic agents encorafenib and ivosidenib (atazanavir may significantly increase blood levels and thus side effects), and with the anticonvulsants carbamazepine, phenobarbital, and phenytoin (which may decrease serum levels of atazanavir). 

The new rules alter sections 4.3 and 4.5 of the summary of product characteristics (SmPC) to reclassify drug–drug interactions with the new contraindications.

Atazanavir is an orally administered drug, used in combination with low-dose ritonavir (Norvir) to boost its pharmacokinetics. It is indicated for the treatment of HIV-1 infected adults and pediatric patients 3 months of age and older in combination with other antiretroviral medicinal products. A combination preparation boosted with cobicistat (Evotaz) is also available.

The drug is an azapeptide HIV-1 protease inhibitor (PI) that selectively inhibits the virus-specific processing of viral Gag-Pol proteins in HIV-1 infected cells, thus preventing formation of mature virions and infection of other cells. This prevents the virus from multiplying and slows the spread of infection. Based on available virological and clinical data from adult patients, no benefit is expected in patients with HIV strains resistant to multiple protease inhibitors (four or more PI mutations).

Therapy with atazanavir is intended to be initiated by a physician experienced in the management of HIV infection, with the choice of atazanavir in treatment-experienced adult and pediatric patients based on individual viral resistance testing and the patient’s treatment history. The standard dose is 300 mg atazanavir taken with 100 mg ritonavir once daily with food.

Atazanavir is already contraindicated in combination or coadministration with a wide variety of other agents:

• Coadministration with simvastatin or lovastatin [statins – risk of increased blood levels with atazanavir].
• Combination with the anti-TB antibiotic rifampicin.
• Combination with the PDE5 inhibitor sildenafil when used for the treatment of pulmonary arterial hypertension only.
• Coadministration with substrates of the CYP3A4 isoform of cytochrome P450 that have narrow therapeutic windows (eg, quetiapine, lurasidone, alfuzosin, astemizole, terfenadine, cisapride, pimozide, quinidine, bepridil, triazolam, oral midazolam, lomitapide, and ergot alkaloids).
• Coadministration with grazoprevir-containing products, including elbasvir/grazoprevir fixed dose combination (hepatitis C drug combination; atazanavir increases its blood levels).
• Coadministration with glecaprevir/pibrentasvir fixed dose combination (hepatitis C drug combination; increased hepatotoxicity due to increased bilirubin concentration).
• Coadministration with products containing St. John’s wort (Hypericum perforatum).

The EMA said detailed recommendations for the use of atazanavir will be described in the updated SmPC, which will be published in the revised European public assessment report after a decision on this change to the marketing authorization has been granted by the European Commission.

A version of this article appeared on Medscape.com.

The Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) this week recommended new contraindications on the coadministration of the protease inhibitor atazanavir (Reyataz, Bristol-Myers Squibb) with antineoplastic agents encorafenib and ivosidenib (atazanavir may significantly increase blood levels and thus side effects), and with the anticonvulsants carbamazepine, phenobarbital, and phenytoin (which may decrease serum levels of atazanavir). 

The new rules alter sections 4.3 and 4.5 of the summary of product characteristics (SmPC) to reclassify drug–drug interactions with the new contraindications.

Atazanavir is an orally administered drug, used in combination with low-dose ritonavir (Norvir) to boost its pharmacokinetics. It is indicated for the treatment of HIV-1 infected adults and pediatric patients 3 months of age and older in combination with other antiretroviral medicinal products. A combination preparation boosted with cobicistat (Evotaz) is also available.

The drug is an azapeptide HIV-1 protease inhibitor (PI) that selectively inhibits the virus-specific processing of viral Gag-Pol proteins in HIV-1 infected cells, thus preventing formation of mature virions and infection of other cells. This prevents the virus from multiplying and slows the spread of infection. Based on available virological and clinical data from adult patients, no benefit is expected in patients with HIV strains resistant to multiple protease inhibitors (four or more PI mutations).

Therapy with atazanavir is intended to be initiated by a physician experienced in the management of HIV infection, with the choice of atazanavir in treatment-experienced adult and pediatric patients based on individual viral resistance testing and the patient’s treatment history. The standard dose is 300 mg atazanavir taken with 100 mg ritonavir once daily with food.

Atazanavir is already contraindicated in combination or coadministration with a wide variety of other agents:

• Coadministration with simvastatin or lovastatin [statins – risk of increased blood levels with atazanavir].
• Combination with the anti-TB antibiotic rifampicin.
• Combination with the PDE5 inhibitor sildenafil when used for the treatment of pulmonary arterial hypertension only.
• Coadministration with substrates of the CYP3A4 isoform of cytochrome P450 that have narrow therapeutic windows (eg, quetiapine, lurasidone, alfuzosin, astemizole, terfenadine, cisapride, pimozide, quinidine, bepridil, triazolam, oral midazolam, lomitapide, and ergot alkaloids).
• Coadministration with grazoprevir-containing products, including elbasvir/grazoprevir fixed dose combination (hepatitis C drug combination; atazanavir increases its blood levels).
• Coadministration with glecaprevir/pibrentasvir fixed dose combination (hepatitis C drug combination; increased hepatotoxicity due to increased bilirubin concentration).
• Coadministration with products containing St. John’s wort (Hypericum perforatum).

The EMA said detailed recommendations for the use of atazanavir will be described in the updated SmPC, which will be published in the revised European public assessment report after a decision on this change to the marketing authorization has been granted by the European Commission.

A version of this article appeared on Medscape.com.

Girls are catching up with and sometimes surpassing boys in terms of adolescent substance use, warned the authors of a new report detailing trends across several regions between 2018 and 2022. The latest 4-yearly Health Behaviour in School-Aged Children study, in collaboration with the World Health Organization (WHO) Regional Office for Europe, concluded that substance use remains “a crucial public health problem among adolescents” despite overall declines in smoking, alcohol, and cannabis use.

The new report: A focus on adolescent substance use in Europe, central Asia, and Canada, detailed substance use among adolescents aged 11, 13, and 15 years across 44 countries and regions in Europe, Central Asia, and Canada in the 2021-2022 school-based survey.

Principal findings included:

• Cigarette smoking: Lifetime smoking declined between 2018 and 2022, particularly among 13-year-old boys and 15-year-old boys and girls. There was also a small but significant decrease in current smoking among 15-year-old boys.
• Alcohol use: Lifetime use decreased overall in boys between 2018 and 2022, particularly among 15-year-olds. An increase was observed among 11- and 13-year-old girls but not 15-year-old girls. There was a small but significant decrease in the proportion of current drinkers among 15-year-old boys, with no change among 11- and 13-year-old boys. Current alcohol use increased among girls in all age groups.
• Cannabis use: Lifetime use among 15-year-olds decreased slightly from 14% to 12% between 2018 and 2022, while 6% of 15-year-olds reported having used cannabis in the previous 30 days.
• Vaping: In 2022 vapes (e-cigarettes) were more popular among adolescents than conventional tobacco cigarettes.

Traditional Gender Gap Narrowing or Reversing

Report coauthor Judith Brown from the University of Glasgow, Glasgow, Scotland, and a project manager for the Scottish survey, said that “there was an overall increase in current alcohol use and drunkenness among older girls” despite the overall decrease in boys’ alcohol use.

She explained: “Substance use has traditionally been more prevalent among boys, and the survey findings confirm a well-established gender difference, with higher prevalence in boys than in girls among 11-year-olds. By the age of 13, however, gender differences diminish or even disappear in many countries and regions.”

“Among 15-year-olds, girls often reported more frequent substance use than boys. While this pattern has been known for cigarette smoking in many countries and regions for about two decades, especially among 15-year-olds, it is a new phenomenon for behaviors related to other substances (such as alcohol consumption and drunkenness) in most countries and regions. Historically, prevalence for these behaviors has been higher among boys than girls.”

The new survey results highlight this gender reversal for several substances, she said. “Cannabis is the only substance for which both lifetime and current use is consistently higher in boys.”
 

Vaping Is an Emerging Public Health Concern

Dr. Brown added that the 2022 survey was the first time that vaping data had been collected from all countries. Although this is against the background of continuing decreases in smoking rates, “researchers suggest the transition to e-cigarettes, as a more popular choice than conventional cigarettes, highlights an urgent need for more targeted interventions to address this emerging public health concern.”

The report authors commented that because young people’s brains are still developing, they are “very sensitive to substances such as nicotine,” making it “easier for them to get hooked.”

Margreet de Looze, PhD, assistant professor of interdisciplinary social science at Utrecht University in Utrecht, the Netherlands, agreed with the authors’ concerns. “Vaping is extremely attractive for young people,” she said, “because the taste is more attractive than that of traditional cigarettes.” Until recently, many people were not aware of health hazards attached to vaping. “While more research is needed, vaping may function as a first step toward tobacco use and is hazardous for young people’s health. Therefore, it should be strongly discouraged.”
 

Substance Use Trends May Be Stabilizing or Rising Again

Increased awareness of the harmful effects of alcohol for adolescent development is also one postulated reason for declining adolescent alcohol consumption in both Europe and North America over the past two decades, which Dr. de Looze’s research has explored. Her work has also noted the “growing trend” of young people abstaining from alcohol altogether and some evidence of reductions in adolescent risk behaviors more generally, including early sexual initiation and juvenile crime.

“It may be good to realize that, in fact, the current generation of youth in many respects is healthier and reports less risky health behaviors as compared to previous generations,” she said.

However, “The declining trend in adolescent substance use that took place in many countries since the beginning of the 21st century seems to have stabilized, and moreover, in some countries and subgroups of adolescents, substance use appears to be on the rise again.” She cited particularly an overall increase in current alcohol use and drunkenness among older girls between 2018 and 2022. “It appears that, especially for girls, recent trends over time are less favorable as compared with boys.”
 

Multiple Influences on Adolescent Substance Abuse

Peer group influences are known to come to the fore during adolescence, and Dr. de Looze added that the early 21st century saw marked reductions in adolescent face-to-face contacts with their peers due to the rise in digital communications. “Adolescents typically use substances in the presence of peers (and in the absence of adults/parents), as it increases their status in their peer group.” Reduced in person interactions with friends may therefore have contributed to the earlier decline in substance use.

However, her team had found that adolescents who spend much time online with friends often also spend much time with friends offline. “They are what you could call the ‘social’ youth, who just spend much time with peers, be it offline or online,” she said. “More research is needed to disentangle exactly how, what kind, for whom the digital environment may be related to young people’s substance use,” she said.

“We also see that young people actively select their friends. So, if you are curious and a bit of a sensation-seeker yourself, you are more likely to become friends with youth who are just like you, and together, you may be more likely to try out substances.”

Factors underlying adolescent substance use and differences between countries are influenced by a complex interplay of factors, said Carina Ferreira-Borges, PhD, regional adviser for alcohol, illicit drugs, and prison health at the WHO Regional Office for Europe.

“Prevention measures definitely play a critical role in reducing substance use,” she said, “but other factors, such as cultural norms and socioeconomic conditions, also significantly impact these patterns.”

“Variations in substance use among countries can be attributed to different levels of implemented polices, public health initiatives, and the extent to which substance use is normalized or stigmatized within each society.”
 

Policy Efforts Must Be Targeted

“To address these disparities effectively, interventions and population-level policies need to be culturally adapted and target the specific environments where substance use is normalized among adolescents. By understanding and modifying the broader context in which young people make choices about substance use, we can better influence their behavior and health outcomes.”

Dr. de Looze cautioned, “In the past two decades, public health efforts in many countries have focused on reducing young people’s engagement in substance use. It is important that these efforts continue, as every year a new generation of youth is born. If public health efforts do not continue to focus on supporting a healthy lifestyle among young people, it should not come as a surprise that rates start or continue to rise again.”

A version of this article appeared on Medscape.com.

Girls are catching up with and sometimes surpassing boys in terms of adolescent substance use, warned the authors of a new report detailing trends across several regions between 2018 and 2022. The latest 4-yearly Health Behaviour in School-Aged Children study, in collaboration with the World Health Organization (WHO) Regional Office for Europe, concluded that substance use remains “a crucial public health problem among adolescents” despite overall declines in smoking, alcohol, and cannabis use.

The new report: A focus on adolescent substance use in Europe, central Asia, and Canada, detailed substance use among adolescents aged 11, 13, and 15 years across 44 countries and regions in Europe, Central Asia, and Canada in the 2021-2022 school-based survey.

Principal findings included:

• Cigarette smoking: Lifetime smoking declined between 2018 and 2022, particularly among 13-year-old boys and 15-year-old boys and girls. There was also a small but significant decrease in current smoking among 15-year-old boys.
• Alcohol use: Lifetime use decreased overall in boys between 2018 and 2022, particularly among 15-year-olds. An increase was observed among 11- and 13-year-old girls but not 15-year-old girls. There was a small but significant decrease in the proportion of current drinkers among 15-year-old boys, with no change among 11- and 13-year-old boys. Current alcohol use increased among girls in all age groups.
• Cannabis use: Lifetime use among 15-year-olds decreased slightly from 14% to 12% between 2018 and 2022, while 6% of 15-year-olds reported having used cannabis in the previous 30 days.
• Vaping: In 2022 vapes (e-cigarettes) were more popular among adolescents than conventional tobacco cigarettes.

Traditional Gender Gap Narrowing or Reversing

Report coauthor Judith Brown from the University of Glasgow, Glasgow, Scotland, and a project manager for the Scottish survey, said that “there was an overall increase in current alcohol use and drunkenness among older girls” despite the overall decrease in boys’ alcohol use.

She explained: “Substance use has traditionally been more prevalent among boys, and the survey findings confirm a well-established gender difference, with higher prevalence in boys than in girls among 11-year-olds. By the age of 13, however, gender differences diminish or even disappear in many countries and regions.”

“Among 15-year-olds, girls often reported more frequent substance use than boys. While this pattern has been known for cigarette smoking in many countries and regions for about two decades, especially among 15-year-olds, it is a new phenomenon for behaviors related to other substances (such as alcohol consumption and drunkenness) in most countries and regions. Historically, prevalence for these behaviors has been higher among boys than girls.”

The new survey results highlight this gender reversal for several substances, she said. “Cannabis is the only substance for which both lifetime and current use is consistently higher in boys.”
 

Vaping Is an Emerging Public Health Concern

Dr. Brown added that the 2022 survey was the first time that vaping data had been collected from all countries. Although this is against the background of continuing decreases in smoking rates, “researchers suggest the transition to e-cigarettes, as a more popular choice than conventional cigarettes, highlights an urgent need for more targeted interventions to address this emerging public health concern.”

The report authors commented that because young people’s brains are still developing, they are “very sensitive to substances such as nicotine,” making it “easier for them to get hooked.”

Margreet de Looze, PhD, assistant professor of interdisciplinary social science at Utrecht University in Utrecht, the Netherlands, agreed with the authors’ concerns. “Vaping is extremely attractive for young people,” she said, “because the taste is more attractive than that of traditional cigarettes.” Until recently, many people were not aware of health hazards attached to vaping. “While more research is needed, vaping may function as a first step toward tobacco use and is hazardous for young people’s health. Therefore, it should be strongly discouraged.”
 

Substance Use Trends May Be Stabilizing or Rising Again

Increased awareness of the harmful effects of alcohol for adolescent development is also one postulated reason for declining adolescent alcohol consumption in both Europe and North America over the past two decades, which Dr. de Looze’s research has explored. Her work has also noted the “growing trend” of young people abstaining from alcohol altogether and some evidence of reductions in adolescent risk behaviors more generally, including early sexual initiation and juvenile crime.

“It may be good to realize that, in fact, the current generation of youth in many respects is healthier and reports less risky health behaviors as compared to previous generations,” she said.

However, “The declining trend in adolescent substance use that took place in many countries since the beginning of the 21st century seems to have stabilized, and moreover, in some countries and subgroups of adolescents, substance use appears to be on the rise again.” She cited particularly an overall increase in current alcohol use and drunkenness among older girls between 2018 and 2022. “It appears that, especially for girls, recent trends over time are less favorable as compared with boys.”
 

Multiple Influences on Adolescent Substance Abuse

Peer group influences are known to come to the fore during adolescence, and Dr. de Looze added that the early 21st century saw marked reductions in adolescent face-to-face contacts with their peers due to the rise in digital communications. “Adolescents typically use substances in the presence of peers (and in the absence of adults/parents), as it increases their status in their peer group.” Reduced in person interactions with friends may therefore have contributed to the earlier decline in substance use.

However, her team had found that adolescents who spend much time online with friends often also spend much time with friends offline. “They are what you could call the ‘social’ youth, who just spend much time with peers, be it offline or online,” she said. “More research is needed to disentangle exactly how, what kind, for whom the digital environment may be related to young people’s substance use,” she said.

“We also see that young people actively select their friends. So, if you are curious and a bit of a sensation-seeker yourself, you are more likely to become friends with youth who are just like you, and together, you may be more likely to try out substances.”

Factors underlying adolescent substance use and differences between countries are influenced by a complex interplay of factors, said Carina Ferreira-Borges, PhD, regional adviser for alcohol, illicit drugs, and prison health at the WHO Regional Office for Europe.

“Prevention measures definitely play a critical role in reducing substance use,” she said, “but other factors, such as cultural norms and socioeconomic conditions, also significantly impact these patterns.”

“Variations in substance use among countries can be attributed to different levels of implemented polices, public health initiatives, and the extent to which substance use is normalized or stigmatized within each society.”
 

Policy Efforts Must Be Targeted

“To address these disparities effectively, interventions and population-level policies need to be culturally adapted and target the specific environments where substance use is normalized among adolescents. By understanding and modifying the broader context in which young people make choices about substance use, we can better influence their behavior and health outcomes.”

Dr. de Looze cautioned, “In the past two decades, public health efforts in many countries have focused on reducing young people’s engagement in substance use. It is important that these efforts continue, as every year a new generation of youth is born. If public health efforts do not continue to focus on supporting a healthy lifestyle among young people, it should not come as a surprise that rates start or continue to rise again.”

A version of this article appeared on Medscape.com.

Girls are catching up with and sometimes surpassing boys in terms of adolescent substance use, warned the authors of a new report detailing trends across several regions between 2018 and 2022. The latest 4-yearly Health Behaviour in School-Aged Children study, in collaboration with the World Health Organization (WHO) Regional Office for Europe, concluded that substance use remains “a crucial public health problem among adolescents” despite overall declines in smoking, alcohol, and cannabis use.

The new report: A focus on adolescent substance use in Europe, central Asia, and Canada, detailed substance use among adolescents aged 11, 13, and 15 years across 44 countries and regions in Europe, Central Asia, and Canada in the 2021-2022 school-based survey.

Principal findings included:

• Cigarette smoking: Lifetime smoking declined between 2018 and 2022, particularly among 13-year-old boys and 15-year-old boys and girls. There was also a small but significant decrease in current smoking among 15-year-old boys.
• Alcohol use: Lifetime use decreased overall in boys between 2018 and 2022, particularly among 15-year-olds. An increase was observed among 11- and 13-year-old girls but not 15-year-old girls. There was a small but significant decrease in the proportion of current drinkers among 15-year-old boys, with no change among 11- and 13-year-old boys. Current alcohol use increased among girls in all age groups.
• Cannabis use: Lifetime use among 15-year-olds decreased slightly from 14% to 12% between 2018 and 2022, while 6% of 15-year-olds reported having used cannabis in the previous 30 days.
• Vaping: In 2022 vapes (e-cigarettes) were more popular among adolescents than conventional tobacco cigarettes.

Traditional Gender Gap Narrowing or Reversing

Report coauthor Judith Brown from the University of Glasgow, Glasgow, Scotland, and a project manager for the Scottish survey, said that “there was an overall increase in current alcohol use and drunkenness among older girls” despite the overall decrease in boys’ alcohol use.

She explained: “Substance use has traditionally been more prevalent among boys, and the survey findings confirm a well-established gender difference, with higher prevalence in boys than in girls among 11-year-olds. By the age of 13, however, gender differences diminish or even disappear in many countries and regions.”

“Among 15-year-olds, girls often reported more frequent substance use than boys. While this pattern has been known for cigarette smoking in many countries and regions for about two decades, especially among 15-year-olds, it is a new phenomenon for behaviors related to other substances (such as alcohol consumption and drunkenness) in most countries and regions. Historically, prevalence for these behaviors has been higher among boys than girls.”

The new survey results highlight this gender reversal for several substances, she said. “Cannabis is the only substance for which both lifetime and current use is consistently higher in boys.”
 

Vaping Is an Emerging Public Health Concern

Dr. Brown added that the 2022 survey was the first time that vaping data had been collected from all countries. Although this is against the background of continuing decreases in smoking rates, “researchers suggest the transition to e-cigarettes, as a more popular choice than conventional cigarettes, highlights an urgent need for more targeted interventions to address this emerging public health concern.”

The report authors commented that because young people’s brains are still developing, they are “very sensitive to substances such as nicotine,” making it “easier for them to get hooked.”

Margreet de Looze, PhD, assistant professor of interdisciplinary social science at Utrecht University in Utrecht, the Netherlands, agreed with the authors’ concerns. “Vaping is extremely attractive for young people,” she said, “because the taste is more attractive than that of traditional cigarettes.” Until recently, many people were not aware of health hazards attached to vaping. “While more research is needed, vaping may function as a first step toward tobacco use and is hazardous for young people’s health. Therefore, it should be strongly discouraged.”
 

Substance Use Trends May Be Stabilizing or Rising Again

Increased awareness of the harmful effects of alcohol for adolescent development is also one postulated reason for declining adolescent alcohol consumption in both Europe and North America over the past two decades, which Dr. de Looze’s research has explored. Her work has also noted the “growing trend” of young people abstaining from alcohol altogether and some evidence of reductions in adolescent risk behaviors more generally, including early sexual initiation and juvenile crime.

“It may be good to realize that, in fact, the current generation of youth in many respects is healthier and reports less risky health behaviors as compared to previous generations,” she said.

However, “The declining trend in adolescent substance use that took place in many countries since the beginning of the 21st century seems to have stabilized, and moreover, in some countries and subgroups of adolescents, substance use appears to be on the rise again.” She cited particularly an overall increase in current alcohol use and drunkenness among older girls between 2018 and 2022. “It appears that, especially for girls, recent trends over time are less favorable as compared with boys.”
 

Multiple Influences on Adolescent Substance Abuse

Peer group influences are known to come to the fore during adolescence, and Dr. de Looze added that the early 21st century saw marked reductions in adolescent face-to-face contacts with their peers due to the rise in digital communications. “Adolescents typically use substances in the presence of peers (and in the absence of adults/parents), as it increases their status in their peer group.” Reduced in person interactions with friends may therefore have contributed to the earlier decline in substance use.

However, her team had found that adolescents who spend much time online with friends often also spend much time with friends offline. “They are what you could call the ‘social’ youth, who just spend much time with peers, be it offline or online,” she said. “More research is needed to disentangle exactly how, what kind, for whom the digital environment may be related to young people’s substance use,” she said.

“We also see that young people actively select their friends. So, if you are curious and a bit of a sensation-seeker yourself, you are more likely to become friends with youth who are just like you, and together, you may be more likely to try out substances.”

Factors underlying adolescent substance use and differences between countries are influenced by a complex interplay of factors, said Carina Ferreira-Borges, PhD, regional adviser for alcohol, illicit drugs, and prison health at the WHO Regional Office for Europe.

“Prevention measures definitely play a critical role in reducing substance use,” she said, “but other factors, such as cultural norms and socioeconomic conditions, also significantly impact these patterns.”

“Variations in substance use among countries can be attributed to different levels of implemented polices, public health initiatives, and the extent to which substance use is normalized or stigmatized within each society.”
 

Policy Efforts Must Be Targeted

“To address these disparities effectively, interventions and population-level policies need to be culturally adapted and target the specific environments where substance use is normalized among adolescents. By understanding and modifying the broader context in which young people make choices about substance use, we can better influence their behavior and health outcomes.”

Dr. de Looze cautioned, “In the past two decades, public health efforts in many countries have focused on reducing young people’s engagement in substance use. It is important that these efforts continue, as every year a new generation of youth is born. If public health efforts do not continue to focus on supporting a healthy lifestyle among young people, it should not come as a surprise that rates start or continue to rise again.”

A version of this article appeared on Medscape.com.