Compassionate care for cannabis users
Cannabis use has a long history of association with women’s health, said Mishka Terplan, MD, MPH, of Friends Research Institute, Baltimore. Although cannabis use overall has increased steadily in recent years, data indicate that people who are pregnant are less likely to use cannabis than those who aren’t. The exception is that individuals who report using cannabis for medical purposes only remain consistent cannabis users during pregnancy.
“The concern is cannabis and birth outcomes, as well as developmental outcomes,” Dr. Terplan said. Multiple studies on this topic support several systematic reviews, and “depending on which decade you read, the results differ slightly.”
Reviews from the 1990s showed little to no effect on birth weight, but more recent studies, such as a meta-analysis published in BMJ Open in 2015, showed increased risk of neonatal outcomes such as low birth weight, anemia, and odds of admission to the neonatal ICU.
“The difference in these two eras is thought to be caused by the change in the definition of what cannabis is, and the potency has increased, and possibly therefore, as a consequence, we see outcomes we hadn’t seen before,” Dr. Terplan explained.
There is a concern with increased use and increased legalization that, there could be adverse effects on neonatal health, but recent studies in Colorado do not show a significant difference in neonatal outcomes before and after legalization, he said.
Data from pregnant women suggest that with regard to cannabis, they are concerned about their health, but they tend to seek information about cannabis use in pregnancy from family, friends, and the Internet rather than their health providers, said Dr. Terplan.
However, studies also show that providers tend to fall short and do a poor job of talking to pregnant patients about cannabis. When providers do discuss cannabis, they tend to focus on the legal aspects. “We are failing our patients when it comes to cannabis,” Dr. Terplan said. “We don’t provide the information and support they need and desire.” Instead, many providers “deploy urine drug testing, which we misinterpret.”
Dr. Terplan explained that point-of-care cannabis testing that shows “THC” is not measuring tetrahydrocannabinol, the psychoactive compound; rather it captures the nonpsychoactive metabolite of THC, one that sticks around for a long time in the biological compartment.
Dr. Terplan urged clinicians not to use urine tests as a default indicator of cannabis use, but instead, “we need to sit, listen, and work with our patients from a place of empathy.”
Questions answered
During a question-and-answer session following the panel, Dr. Bradley was asked about preconception counseling related to alcohol consumption.
“Preconception time is a perfect time to do screening, or offer contraception if a patient is a place where she doesn’t want to become pregnant or if she wants to take advantage of any therapeutic options to get well prior to pregnancy,” she said.
Dr. Wright responded to a question about the impact of punitive actions such as drug testing and incarceration. “These things decrease the chance that patients will get adequate prenatal care,” she said. “We need to advocate for our patients and advocate for changing drug laws.”
Dr. Terplan responded to a question about the impact of substance use on parenting. Parents use nicotine, alcohol, and also cannabis, he said. Data showing an association between substance use and cases of child abuse and neglect, “are of poor quality and do not support this association.”
Overall, “we need to have consistent messaging that we are not there to judge patients,” Dr. Bradley added. “The last thing we want is for patients not to be honest with us.”
Dr. Wright disclosed consulting fees from McKesson and royalties as the coauthor of a book, “Opioid-Use Disorders in Pregnancy.” Dr. Bradley had no financial conflicts to disclose. Dr. Terplan had no financial conflicts to disclose.