Icariin combined with breviscapine improves the erectile function of spontaneously hypertensive rats. Acta Pharmacol Sin ; This will increase the supply of blood to the lungs and reduce the workload of the heart. Kaempferia parviflora, a plant used in traditional medicine to enhance sexual performance contains large amounts of low affinity PDE5 inhibitors. Neychev V, Mitev V.Sales of Jin’ge, the Chinese version of Viagra, increased year-on-year by percent in thanks to strong demand in both the home and overseas markets, according to . In fact, a recent review of studies found that some counterfeit drugs contained a very high, dangerous level of sildenafil that far exceeded a typical prescription dosage. . A 50 milligram pill of Jin’ge, equal in dose to Viagra, costs 48 yuan, 60 percent lower than its overseas counterparts. Jin’ge comes in packs of one, two, three, four and 10 tablets. .