This supplement, which is sold over the counter, also contains Larginine, an amino acid precursor to nitric oxide, which plays a central role in sexual arousal in part through increasing smooth muscle relaxation. Has actions similar to Viagra, said at the meeting, sponsored by Harvard Medical School. It also contains Korean ginseng; vitamins A, C, and E; and minerals in different formulations for men and women. In a double-blind study of the womens formulation, 77 participants were randomized to receive the supplement or a placebo for four weeks. Improvements in overall sexual satisfaction were reported by 73 percent of women taking the supplement, compared with 37 percent of those receiving placebo. Ginkgo alone also works for some patients, but a high dosage often is required. When taken in doses of 60-120 mg twice daily, ginkgo may increase genital blood flow, but also may cause bleeding because of its anticoagulant effects.
In an open trial of ginkgo extract that included 30 men and 33 women with SSRI-related sexual dysfunction, 91 percent of the women and 76 percent of the men reported that the herb in doses ranging from 60mg/day to 120mg/day had enhancing effects on all phases to the sexual response cycle.