Stimulant

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Stimulants are drugs that can increase alertness and awareness, usually for a short time only. Most stimulants have more side-effects than other drugs. Some are classified as illegal drugs, most can cause addiction. For this reason, most legal stimulants are only available on prescription. Stimulants act on the nerves: Stimulants cause more neuro transmitters to the synapse (this is the gap between different nerves)

Most stimulants fall into one of the following groups:

Some of the substances mentioned above can be used to treat certain diseases. Some are mostly used as illegal drugs.