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I wonder about the dosage you might’ve been taking. Many, many people take much more than needed, and higher doses are more likely to have adverse effects. 250-300 µg is an appropriate dosage for most adults. Note that common over-the-counter dosages are 10 to 25 mg. There is a Cochran collaboration meta-analysis supporting this. I work in a pharmacy school in the US. One of my colleagues told me a funny anecdote abo…
10-25mg seems really high. UK NHS advice is 2mg for sleep, 3mg for jet lag, w/advice it can be increased to up to 10mg if you don't get the desired.effect at lower doses. For my part, 3mg leaves me totally ruined (exhausted, lethargic, worse than being ill) the following day. 1mg seems to improve my sleep, but I can totally believe less would work too. I will certainly not go higher. UK is weird with this - I can ord…
I experimented with higher doses, such as 15 mg. They worked like sledgehammer to the forehead, with a weird feeling the next day. Not recommended. A good sleep mask and ear plugs are better than increasing dosage of melatonin, at least for me.
Here in CZ, melatonin is OTC.