A pregnant client wants information about taking Isosorbide DN while breastfeeding. She takes 5-10 mg. (occasionally 15 mg.) before lunch and dinner for achalasia ("failure of the cardiac sphicter to open when it should"). She really wants to breastfeed. Muscle relaxants haven't helped her, and she found nifedipine less helpful than isosorbide. Dr. Tom Hale has graciously replied to my private e-mail on the subject. If anyone else has information, especially physicians or pharmacists, please e-mail me privately, as I am currently NOMAIL. Please let me know if I can quote you to the woman concerned. TIA, Bonnie