Tadalafil is an orally administrated drug developed by the pharmaceutical company Eli Lily for treatment of male erectile dysfunction disease. It belongs to the second generation of phosphodiesterase type 5 inhibitors. Study has shown that compared , the onset rate of Tadalafil is very rapid with about 15 ~ 20 min for onset and with long-term effects up to 36h. Its T1/2 was 17.5h. In a study including 348 cases of patients with mild to severe erectile dysfunction, male patients were randomized for being subject to 20 mg of tadalafil or placebo. The results have showed that, compared with placebo, the intercourse success rate at 24 and 36 hours after taking the drug are both improved with most male patients can successfully have sexual intercourse for twice within 36 hours. There is also no difference in the incidence and severity of the adverse drug reactions compared with placebo. In the tadalafil group, more than 5% of men get headache and indigestion. 
Adverse reactions: It has no serious adverse reactions. No adverse reactions such as facial flushing, vision abnormalities after serving have been observed. There has been occasionally headache and indigestion.
Note: For patients serving nitrates, angina, heart disease, uncontrolled hypertension or hypotension. Patients who had got stroke within the past six months should be disabled.
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Shanghai Biolang Biological  Co.,Ltd located in the Shanghai Zhangjiang BioPark where is a  Hightech Medical industry of China,specilize in producing and developing Sarms, peptide and antipsychotics raw materials in distributing the products of our own company and affiliated enterprises. We have set up R&D center, quality inspection center and manufacturing site in Wuhan, Jiangsu and others places.Our company has professional staff who deal with chemical R&D and scientific management, and holds several sets of analyzing instruments with high efficiency and high sensitivity, such as HPLC, GC and Spectrophotometer. Meanwhile, we possess of complete Q.A. and Q.C. system, supply chemical products with good quality and customtailored products according to our clients' requirement. We have professional sales team, focus on quality and service, and we have achieved excellent performance over the10 years. Our company is committed to the development of international market , our products are mainly exported to many countries and regions, such as Europe, America, Southeast Asia, the Middle East and Africa etc. With our constant efforts and good service, We sincerely hope to establish longterm cooperation and common development with our customers.