Hi Ms Priyanka, Thank you for posting your query. Betacap TR is a beta blocker and it is very effective in preventing attacks of headache in a patient with migraine. It is generally well tolerated and no significant side effects are reported. The common side effects with betacap TR can be worsening of bronchial asthma in a patient with asthma. It can also cause depression. Other uncommon side effects can be palpitations, fainting, swelling of feet, nausea, skin reactions, sleep probelms and tired feeling. Also, I would like to point out that unlike Divaa (Divalproex) which has action against both migraine and epilepsy, betacap TR works only against migraine and not against epilepsy. Best wishes, Dr Sudhir Kumar MD DM (Neurology) Senior Consultant Neurologist Apollo Hospitals, Hyderabad