BOH, also known as 3,4-methylenedioxy-β-methoxyphenethylamine, is a drug of the phenethylamine class. It is the β-methoxy analogue of methylenedioxyphenethylamine (MDPEA), and is also more distantly related to methylone. On account of its similarity to norepinephrine, the effects of BOH may be of a purely adrenergic nature.

BOH was first synthesized by Alexander Shulgin. In his book PiHKAL, the dosage range is listed as 80–120 mg, and the duration listed as 6–8 hours. Shulgin reports that BOH causes slight warmth, mydriasis, anorexia, mild nausea, and cold feet, with no psychedelic, entactogen, or euphoriant effects. He gives it a ++ on the Shulgin Rating Scale. Very little is known about the pharmacology, pharmacokinetics, effects, and toxicity of BOH.

BOH or Boh may refer to:

A drug, broadly speaking, is any substance that, when absorbed into the body of a living organism, alters normal bodily function. There is no single, precise definition, as there are different meanings in drug control law, government regulations, medicine, and colloquial usage.

In pharmacology, a drug is "a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being." Drugs may be prescribed for a limited duration, or on a regular basis for chronic disorders.

The molecules of drugs are complex, and most of them consist of many hydrogen and carbon atoms, a few oxygen atoms, and one or a few nitrogen atoms. Drugs may also have no nitrogen atoms in it and many may have chlorine atoms in it, such as chloral hydrate.

Recreational drugs are chemical substances that affect the central nervous system, such as opioids or hallucinogens. They may be used for perceived beneficial effects on perception, consciousness, personality, and behavior. Some drugs can cause addiction and/or habituation.