What if I took more than one dose of Serenol a day? Julia November 15, 2019 15:11 Updated Follow Please consult your doctor. Serenol is a nutritional supplement, but we always recommend you speak with your doctor. Related articles Can you take Serenol if you are taking birth control? Can Serenol be taken with different types of medications (e.g., blood pressure, cholesterollowering, heart disease, ulcer, GERD?) What are the major side effects of Serenol? What is Serenol? Can I take Serenol if I am allergic to pollen? Comments 0 comments Article is closed for comments.