Availability
Legal availability of melatonin varies in different countries, ranging from being available without prescription (e.g. in most of North America) to being available only on prescription or not at all (although its possession and use may not be illegal). In the UK it is available on prescription only.
The hormone may be administered orally, as capsules, tablets or liquid, sublingually, or as transdermal patches.
The use of melatonin derived from animal pineal tissue may carry the risk of contamination or the means of transmitting viral material. The synthetic form of this medication does not carry this risk.
Read more about this topic: Melatonin
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