There are currently three generations of anti-ED drugs in the domestic market. The first generation is sildenafil, the second generation is tadalafil, and the third generation is vardenafil. The differences between the several Viagra types:
1. Sildenafil is also commonly known as an anti-ED drug. This drug became famous when it was first launched on the market. Because of its very significant therapeutic effect, its time on the market and sales volume were both in the retail market. It is the largest and earliest generation of drugs;
2. Tadalafil has the same principle of action as the first generation, but has improvements in details, shortening the drug's onset of effect;
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3. Vardenafil. Vardenafil is the latest drug for the treatment of erectile dysfunction in the world. It has the same treatment principle, but is more humane in terms of function, has the least dosage, and has fewer side effects on the human body. , the overall safety and comprehensiveness are more perfect.