What if I took more than one dose of Serenol a day? Bonafide Health 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 If I forgot to take Serenol one day, should I double my dose the next day? How long does Serenol take to work? Do I have to take Serenol with food? How long before or after meals? Do I take it at bedtime? What are the major side effects of Serenol? Can you take Serenol if you are taking birth control? Comments 0 comments Article is closed for comments.