Muira puama is a plant. The wood and root are used to make medicine. Muira puama is used for preventing sexual disorders and to increase interest in sexual activity (as an aphrodisiac). It is also used for upset stomach, menstrual disorders, joint pain (rheumatism), and paralysis caused by poliomyelitis; and as a general tonic and an appetite stimulant. Some people apply muira puama directly to the skin as an aphrodisiac and for rheumatism and muscle paralysis. In combination with other herbs, muira puama is used as a remedy for male sexual performance problems (erectile dysfunction, ED).