Are stomach pain and back pain caused by side effects of duphaston tablets?
Patient: I had duphaston tablet for 10 days twice a day....ie from 14 days of my cycle to 24 day...usually my cycle is of 26 days..this month i got periods on 29th day and it vey painful...i hav sharp stomach and back pain....i am worried to continue duphaston for next month... Doctor: Hi,  Oh, I cannot say in your particular case, but generally, it will change the cycle. AND inhibiting the cycle ending and having it build up is pretty common. There are many adjustments of this or a different drug that would be another roll of the dice to see if it worked out better. BUT mostly you'd get the same results every month with the same pill.  Hope I have answered your query. Let me know if I can assist you further.  Regards, Dr. Matt Wachsman, Addiction Medicine Specialist