I'm taking Metoprolol 50mg Succ. (in the a.m.) for anxiety related sinus tachycardia. Is it safe to take Melatonin 3mg to help with sleep issues?

Usually OK. The most common melatonin side effects include: •Daytime sleepiness •Headaches •Dizziness Other, less common melatonin side effects might include abdominal discomfort, mild anxiety, irritability, confusion and short-lasting feelings of depression. In addition, melatonin supplements can interact with various medications, including: •Blood-thinning medications (anticoagulants) •Medications that suppress the immune system (immunosuppressants) •Diabetes medications •Birth control pills.