By Mara Gaudette, MS, CGC, Teratogen Information Specialist, MotherToBaby
My friend Jocelyn, newly (and unexpectedly!) pregnant called in a bit of a panic. Her cardiologist was switching her high blood pressure medication now that she was pregnant. Jocelyn was still waiting for her asthma doctor to call her back but she figured her asthma treatment plan was another of the many changes she needed to make to accommodate the pregnancy. “Does anything stay the same?” she asked.
Jocelyn was relieved to learn that at least in the case of asthma, the answer is, often, YES! The general thought is that the medications working to treat asthma in a non-pregnant person are the same ones that should be continued during pregnancy. This is because the main concern is with asthma itself and making sure the developing baby is getting a good supply of oxygen. Improving asthma control is thought to be best for both mom and baby.
Jocelyn had been taking an inhaled corticosteroid for the past five years-ever since she otherwise needed to use her fast-acting rescue inhaler almost daily. Fortunately, for Jocelyn, if a daily preventative is needed, an inhaled corticosteroid like Pulmicort® that she was already taking is a preferred treatment. Why? Well, for one thing, it often works well to stop symptoms. Secondly, because it is inhaled, less of the medication should be able to reach a pregnancy compared to most oral medications. For the same reasons, albuterol for relief of immediate asthma symptoms is also considered a preferred treatment during pregnancy. But, had Jackie been on other types of inhalers when she identified her pregnancy, and they were working well for her, they probably would not need to be changed either.
Maternal asthma that is not well controlled is associated with higher rates of pregnancy complications, such as decreased growth of the baby and preterm delivery (birth before week 37). Therefore, it is important that asthma management during pregnancy continues to include the medications that best control an individual’s asthma symptoms. “Ok,” Jocelyn said. “I will keep going with my inhalers and bug the doctor’s office again to get back to me to confirm.”
Thankfully, the next call I got from Jocelyn wasn’t so panic-stricken. “It sounds like my doctor wants me to continue my asthma inhalers.” With a calmer tone to her voice since our first conversation, she added, “although I would never be a guinea pig, it would be nice if I could help other pregnant persons with asthma so they wouldn’t have to go through the scare I just went through.” I told her we can never have too much information when it comes to asthma and treatments during pregnancy and let her know that at MotherToBaby we are still enrolling pregnant persons with asthma, pregnant persons taking asthma medicines, and even pregnant persons without asthma. There is no cost and you are not asked to take any medication… so guinea pigs need not apply! Just call 877-311-8972 or volunteer for a study through our website.
“Oh, what about my allergy medicine?” Jocelyn remembered to ask. “When I don’t take Zyrtec®, my asthma flares, and my allergies have been crazy this spring.” I let her know that antihistamines in general have relatively reassuring pregnancy profiles, but it is always good to check on the specific medication. Pregnancy studies with cetirizine, the medication found in Zyrtec®, have found no increase in birth defects. You can check the product label to make sure cetirizine is the only medication in your product since brand name products can make different formulations. As with any medication in pregnancy, check in with your healthcare provider and follow their dosing recommendations.
More detailed medication information can be found in the following fact sheets:
https://mothertobaby.org/fact-sheets/albuterol-pregnancy/
https://mothertobaby.org/fact-sheets/asthma-and-pregnancy/
https://mothertobaby.org/fact-sheets/cetirizine/
https://mothertobaby.org/fact-sheets/inhaled-corticosteroids-icss-pregnancy/
Bottomline, breathe in, breathe out, and enjoy your pregnancy as best as possible!
Mara Gaudette is a genetic counselor and received her Masters Degree from Northwestern University. Drawn to the satisfaction of providing immediate
reassurance to worried women, she began educating the public about teratogens at MotherToBaby’s Illinois affiliate more than a decade ago. Today, she counsels for MotherToBaby California via phone and live chat.
MotherToBaby is a service of the international Organization of Teratology Information Specialists (OTIS), a suggested resource by many agencies, including the Centers for Disease Control and Prevention (CDC). If you have questions about medications, alcohol, diseases, vaccines, or other exposures during pregnancy or breastfeeding, call MotherToBaby toll-FREE at 866-626-6847 or visit MotherToBaby.org to browse a library of fact sheets and find your nearest affiliate.
