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SAN FRANCISCO – appears to be the “major factor” causing higher-grade systemic reactions or death from this treatment, David I. Bernstein, MD, said at the annual meeting of the American Academy of Allergy, Asthma, and Immunology.
While that was Dr. Bernstein’s top take-home message on how to optimize tolerability of subcutaneous immunotherapy (SCIT), a few other empiric rules have also emerged from his ongoing analysis of survey results from the AAAAI/American College of Allergy, Asthma, and Immunology SCIT surveillance study. The study began tracking the safety of SCIT in 2008 through annual surveys sent to members of either of these two allergy societies. By early 2019, the surveys had gathered data from more than 55 million office visits for SCIT, with responses from roughly 200-500 allergy practices annually, said Dr. Bernstein, professor of medicine at the University of Cincinnati.
The survey results identified seven SCIT-related fatalities over about a decade of surveillance. The most common risk factor among these cases was severe, uncontrolled asthma, prompting Dr. Bernstein to conclude that these patients should not receive SCIT. “If the asthma is well controlled, then SCIT is fine,” even if it had been severe before treatment, he said in an interview.
Other factors affecting SCIT safety based on the survey results included:
- Screening patients with an asthma history for current asthma symptoms and lung function before each injection. Survey results showed that while 86% of respondents screened for symptoms, only a third also checked lung function.
- Modifying the dose or stopping SCIT injections after a severe systemic reaction. Survey results showed that more than a quarter of all systemic reactions and more than a third of grade 3 systemic reactions (severe anaphylaxis) happened following a prior systemic reaction. Dr. Bernstein called this “an important, modifiable risk factor.”
- Administering SCIT only in a setting staffed to manage a possible anaphylaxis episode, and adhere to at least a 30-minute observation period. “A key step is observing for at least 30 minutes, and giving epinephrine promptly when needed; the sooner the better,” Dr. Bernstein said. Although the percentage of practices that observe patients for at least 30 minutes has steadily improved during the decade that the survey has run, in 2016 a quarter of responding practices continued to not observe patients for at least 30 minutes.
- Modifying the SCIT dose in high-risk patients during the peak season for aeroallergens like pollen. Survey results showed that practices that did not adjust their SCIT dosages during peak pollen seasons had about double the rate of grade 3 or 4 systemic reactions, compared with practices that dialed down their dosages.
- Reducing SCIT dosages during an accelerated cluster buildup, a treatment approach that in general increases the risk for systemic reactions.
Survey results also showed that sublingual immunotherapy, available in U.S. practice since 2014, has been very safe, with no reported associated deaths and only rare reports of anaphylactic episodes, Dr. Bernstein said. The most recent published report from the surveillance study appeared online a few days before Dr. Bernstein spoke (J Allergy Clin Immunol Pract. 2019 Feb 15. doi: 10.1016/j.jaip.2019.01.058).
Dr. Bernstein had no relevant disclosures.
SAN FRANCISCO – appears to be the “major factor” causing higher-grade systemic reactions or death from this treatment, David I. Bernstein, MD, said at the annual meeting of the American Academy of Allergy, Asthma, and Immunology.
While that was Dr. Bernstein’s top take-home message on how to optimize tolerability of subcutaneous immunotherapy (SCIT), a few other empiric rules have also emerged from his ongoing analysis of survey results from the AAAAI/American College of Allergy, Asthma, and Immunology SCIT surveillance study. The study began tracking the safety of SCIT in 2008 through annual surveys sent to members of either of these two allergy societies. By early 2019, the surveys had gathered data from more than 55 million office visits for SCIT, with responses from roughly 200-500 allergy practices annually, said Dr. Bernstein, professor of medicine at the University of Cincinnati.
The survey results identified seven SCIT-related fatalities over about a decade of surveillance. The most common risk factor among these cases was severe, uncontrolled asthma, prompting Dr. Bernstein to conclude that these patients should not receive SCIT. “If the asthma is well controlled, then SCIT is fine,” even if it had been severe before treatment, he said in an interview.
Other factors affecting SCIT safety based on the survey results included:
- Screening patients with an asthma history for current asthma symptoms and lung function before each injection. Survey results showed that while 86% of respondents screened for symptoms, only a third also checked lung function.
- Modifying the dose or stopping SCIT injections after a severe systemic reaction. Survey results showed that more than a quarter of all systemic reactions and more than a third of grade 3 systemic reactions (severe anaphylaxis) happened following a prior systemic reaction. Dr. Bernstein called this “an important, modifiable risk factor.”
- Administering SCIT only in a setting staffed to manage a possible anaphylaxis episode, and adhere to at least a 30-minute observation period. “A key step is observing for at least 30 minutes, and giving epinephrine promptly when needed; the sooner the better,” Dr. Bernstein said. Although the percentage of practices that observe patients for at least 30 minutes has steadily improved during the decade that the survey has run, in 2016 a quarter of responding practices continued to not observe patients for at least 30 minutes.
- Modifying the SCIT dose in high-risk patients during the peak season for aeroallergens like pollen. Survey results showed that practices that did not adjust their SCIT dosages during peak pollen seasons had about double the rate of grade 3 or 4 systemic reactions, compared with practices that dialed down their dosages.
- Reducing SCIT dosages during an accelerated cluster buildup, a treatment approach that in general increases the risk for systemic reactions.
Survey results also showed that sublingual immunotherapy, available in U.S. practice since 2014, has been very safe, with no reported associated deaths and only rare reports of anaphylactic episodes, Dr. Bernstein said. The most recent published report from the surveillance study appeared online a few days before Dr. Bernstein spoke (J Allergy Clin Immunol Pract. 2019 Feb 15. doi: 10.1016/j.jaip.2019.01.058).
Dr. Bernstein had no relevant disclosures.
SAN FRANCISCO – appears to be the “major factor” causing higher-grade systemic reactions or death from this treatment, David I. Bernstein, MD, said at the annual meeting of the American Academy of Allergy, Asthma, and Immunology.
While that was Dr. Bernstein’s top take-home message on how to optimize tolerability of subcutaneous immunotherapy (SCIT), a few other empiric rules have also emerged from his ongoing analysis of survey results from the AAAAI/American College of Allergy, Asthma, and Immunology SCIT surveillance study. The study began tracking the safety of SCIT in 2008 through annual surveys sent to members of either of these two allergy societies. By early 2019, the surveys had gathered data from more than 55 million office visits for SCIT, with responses from roughly 200-500 allergy practices annually, said Dr. Bernstein, professor of medicine at the University of Cincinnati.
The survey results identified seven SCIT-related fatalities over about a decade of surveillance. The most common risk factor among these cases was severe, uncontrolled asthma, prompting Dr. Bernstein to conclude that these patients should not receive SCIT. “If the asthma is well controlled, then SCIT is fine,” even if it had been severe before treatment, he said in an interview.
Other factors affecting SCIT safety based on the survey results included:
- Screening patients with an asthma history for current asthma symptoms and lung function before each injection. Survey results showed that while 86% of respondents screened for symptoms, only a third also checked lung function.
- Modifying the dose or stopping SCIT injections after a severe systemic reaction. Survey results showed that more than a quarter of all systemic reactions and more than a third of grade 3 systemic reactions (severe anaphylaxis) happened following a prior systemic reaction. Dr. Bernstein called this “an important, modifiable risk factor.”
- Administering SCIT only in a setting staffed to manage a possible anaphylaxis episode, and adhere to at least a 30-minute observation period. “A key step is observing for at least 30 minutes, and giving epinephrine promptly when needed; the sooner the better,” Dr. Bernstein said. Although the percentage of practices that observe patients for at least 30 minutes has steadily improved during the decade that the survey has run, in 2016 a quarter of responding practices continued to not observe patients for at least 30 minutes.
- Modifying the SCIT dose in high-risk patients during the peak season for aeroallergens like pollen. Survey results showed that practices that did not adjust their SCIT dosages during peak pollen seasons had about double the rate of grade 3 or 4 systemic reactions, compared with practices that dialed down their dosages.
- Reducing SCIT dosages during an accelerated cluster buildup, a treatment approach that in general increases the risk for systemic reactions.
Survey results also showed that sublingual immunotherapy, available in U.S. practice since 2014, has been very safe, with no reported associated deaths and only rare reports of anaphylactic episodes, Dr. Bernstein said. The most recent published report from the surveillance study appeared online a few days before Dr. Bernstein spoke (J Allergy Clin Immunol Pract. 2019 Feb 15. doi: 10.1016/j.jaip.2019.01.058).
Dr. Bernstein had no relevant disclosures.
REPORTING FROM AAAAI