Yes, I did. I was fine. Lack of oxygen to your baby is much more harmful than taking the drug that will allow you to breathe. I would recommend talking to your doctor, taking as many precautions as possible to prevent attacks, as in keeping your home clean and dust free, treating your mattress for dust mites, limiting dairy, and avoiding known allergens. I've had to take it sporadically with the last two, and both babies were fine.