Zhewitra 20mg Tablet is used to treat male erectile dysfunction. It improves blood flow to the penis, allowing men to achieve an erection. When sexually stimulated, it relaxes the blood vessels in the penis, allowing blood to flow into the penis. Zhewitra 20mg Tablet contains Vardenafil, a phosphodiesterase (PDE-5) inhibitor as its active ingredient. It relaxes the blood vessel muscles in the penis, increasing blood flow to the penis and thus treating erectile dysfunction. An erection can only be obtained if the individual is sexually stimulated.