Seasonale Birth Control Side Effects

Patient: Hi, I am currently on my second pack of Seasonale. During the first pack, I had breakthrough bleeding for about 5 weeks at the end, followed by a regular period. I thought that was just my body getting used to that pill, but now on my second pack, its following the same pattern, as I started breakthrough bleeding with 5 weeks left in my pack, and its been going on for over a week now. Its really light, with no cramps, but still inconvenient. Before Seasonale, I was on Yasmin, but i switch as I was getting 8 or 9 day periods with Yasmin, heavier with cramps. My family doctor always told me if I had breakthrough bleeding to continue taking the pill, however, considering that I was bleeding for over 5 weeks last time, I’m a little skeptical to continue taking it this time. Should I just continue taking the pill? or should I take a week off and start a fresh pack? or should I switch back to Yasmin? Thanks.




Doctor: I understand your worry about breakthrough bleeding during your 5th week while taking Seasonale. I agree with you and yo ur doctor that this type of bleeding could be caused by a side effect of the contraceptive, in fact it is the most likely cause.If the bleeding is present during the first 3 cycles, it might be considered to be caused by a side effect of the pill due the changes in hormone levels. However if the bleeding persists and/or prolongs for more than a week, even if it is light, a reevaluation might need to be done to rule out other causes such as low estrogen.It would be better for you to consult your gynecologist for a reevaluation of your medication. He would take a more detailed history of the events, physical exam, and possible blood test to evaluate your Hemoglobin levels and probably change your contraceptives. I wish you the best.


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Dr. Suneel Sharman M.D.

Dr. Suneel Sharman M.D.

Dr. Suneel Sharman completed his residency in Family Medicine at the University of Toronto. He currently operates Infinity Health Centre, a walk-in-clinic in downtown Toronto.

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