Butaxamine (INN; also known as butoxamine) is a ò<sub>2</sub>-selective beta blocker. Its primary use is in experimental situations in which blockade of ò<sub>2</sub> receptors is necessary to determine the activity of the drug (i.e. if the ò<sub>2</sub> receptor is completely blocked, but the given effect is still present, the given effect is not a characteristic of the ò<sub>2</sub> receptor). It has no clinical use. An alternative name is ñ-(1-[tert-butylamino]ethyl)-2,5-dimethoxybenzyl alcohol.