Since the risk of seizures is dose-related, you should not exceed the recommended dose. In case you need an increase in the dosage, your doctor will gradually increase the dose. Seizures are more common with Zyban 150mg Tablet SR medicines which are released immediately on taking than with prolonged-release preparations. Consult your doctor if you are trying to stop alcohol while using Zyban 150mg Tablet SR. It is advised that you reduce your alcohol intake slowly over time.