Experiment with lower doses first.
Good product and good deal for 5 mg 180 capsules with low price from Now Foods. I have used in the past 3 mg of melatonin capsules, and gone for 5 mg for the dozens of health benefits but not sleep. So drowsiness is a side effect for me. I thought I could handle 5 mg as a man 92 kg, but I was really wrong. The truth is that human do not need such doses for the general health benefits of melatonin. Start with 1 mg with one or two capsules to see your reaction, and do not take high doses for long periods as this can suppress your natural melatonin. So definitely take brakes and do not over do it. Finally I was forced to open the capsule and take quarters and thirds. 5 mg altogether, gave me foggy brain, headaches, morning sickness, strong vivid dreams, and 'sandy' eyes when waking.