Can you take melatonin if allergic to penicillin?

Yes, you can generally take melatonin if you are allergic to penicillin, as they are different substances and Allergies to one do not typically affect the other. However, it's always best to consult with a healthcare professional before starting any new supplement, especially if you have a history of allergies or other medical conditions. They can provide personalized advice and ensure that melatonin is safe for you based on your individual health profile.