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LSD Category: Psychedlics

Also called: lysergic acid diethylamide, acid, blotter, cheer, dots, flash, hawk, L, lightening flash, liquid acid, lucy, micro dot, trips, tabs.

How it’s used

LSD is a hallucinogenic drug. It comes from ergot, a fungus found growing wild on rye and other grasses. It comes as a piece of paper with pictures on it, which you suck or swallow.

Short-term effects

Long-term effects

Other dangers

If you are pregnant

Do not use if you are pregnant as we don’t know enough about the risks to your baby.


LSD is not addictive, but you can build tolerance so you need to take more to get the same effect.


No withdrawal symptoms

How long does it stay in your system?

LSD will show up in a urine test for 2-3 days. (The length of time depends on the test used, the amount you take, if you have other medical conditions and your own metabolism. Please use this figure as a guide only)

What help is available?

« Back to Types of Drugs page
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Find a local service that can help

The HSE and Union of Students in Ireland (USI) ask students to think about drug safety measures when using club drugs
Harm reduction messages from the #SaferStudentNights campaign.
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