Horny goat weed, Epimedium grandiflorum, has been traditionally used in treating sexual dysfunction, fatigue, and arthritis. The herb's active constituent, icariin, has been shown in animal studies to help the body form maintain an erection. Horny goat weed also stimulates the production of osteoblasts, which are specialized cells involving in building bone mass. The flavonoids in horny goat weed are believed to stimulate the nerves, improving the sensation of touch.
High doses of horny goat weed may result in breathing trouble, dizziness, vomiting, thirst, and dry mouth.
This can be taken as a capsule.