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The key mechanism of Snovitra XL is the inhibition of the PDE5 enzyme. Normally, this enzyme breaks down a substance called cGMP, which relaxes blood vessels and allows blood flow. By blocking PDE5, Vardenafil increases cGMP levels, leading to relaxation of the penile blood vessels and improved blood circulation during sexual stimulation. Snovitra XL is taken orally, typically 30 to 60 minutes before planned sexual activity. It should be swallowed with water and can be taken with or without food. However, heavy or high-fat meals may slow its absorption and delay its effects. Once active, the medication can remain effective for about 4 to 5 hours.