Methylhexanamine, commonly known as 1,3-dimethylamylamine or DMAA, is an organic compound. It is marketed under many names and used in many different dietary supplements. It is also used in nasal decongestants, as well as treatment for hypertrophied oral tissues. It is a vasoconstrictor, which is any substance that causes the layer of smooth muscle in the blood vessels to contract, resulting in a shortening of the diameter of the blood vessel. This causes a rise in vascular resistance or the amount of energy it takes for blood to move through the blood vessels, and an increase in blood pressure. Can be taken as a drug, such as caffeine, pseudoephedrine, amphetamines, and antihistamines. In a medical setting, such drugs are used as decongestants, agents to raise blood pressure, and agents to stem blood flow to a certain area.
1,3-dimethylamylamine or DMAA has been marketed as a dietary supplement in combination with caffeine and other ingredients. They are to be used as an over-the-counter thermogenic or general purpose stimulant. Dimethylamylamine or methylhexanamine is an emerging active ingredient of party pills.