γ-Hydroxyvaleric acid (GHV), also known as 4-methyl-GHB, is a designer drug related to γ-hydroxybutyric acid (GHB).

It is sometimes seen on the grey market as a legal alternative to GHB, but with lower potency and higher toxicity,[2] properties which have tended to limit its recreational use.

[3] γ-Valerolactone (GVL) acts as a prodrug to GHV, analogously to how γ-butyrolactone (GBL) is a prodrug to GHB.

[4] This drug article relating to the nervous system is a stub.

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