<s>[INST] I have irregular menstrual cycles due to increased thyroid levels and PCOS, hence my gynae suggested I take Novelon for 21 days to regularise the cycle. yesterday night i took the first one and today morning i feel extremely sleepy. is this normal or should i talk to my doctor? [/INST] HiDizziness or fatigue can occur with Novelon. Watch the pattern for the next few days and if the dizziness continues,it could be because of the drug.Side effects may reduce in the subsequent cycles and hence continue the drug for few more days. Incase of severe allergy to the drug such as rashes or swelling of face or lips or difficulty in swallowing ,the drug should be stopped.Hope I have answered your query. Let me know if I can assist you further. RegardsDr.Saranya Ramadoss, General and Family Physician </s>