Historically, it was used mostly to increase sexual desire (as an aphrodisiac). Damiana is used to treat headache, bedwetting, depression, nervous stomach, and constipation; for prevention and treatment of sexual problems; boosting and maintaining mental and physical stamina; and as an aphrodisiac.
Damiana is commonly used by mouth as an aphrodisiac and to treat sexual problems. It is also used to treat stomach complains such as dyspepsia, diarrhea, and constipation and to improve symptoms of menopause and premenstrual syndrome (PMS). But there is little scientific evidence to support its use for any of these conditions.
Some people inhale damiana for a slight "high.