Similar to Sildenafil and other erectile dysfunction medications, Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor, which means it blocks the PSE5 enzyme from restricting blood vessels near the penis, thereby improving blood flow into and out during erections. It is important to remember that for Tadalafil to work, sexual stimulation and arousal is required.
Also like Viagra and Levitra, Cialis impacts (for the better) on a chemical in your body called nitric oxide, which encourages muscles to relax. These relaxed muscles let blood to flow more freely and help give a firmer erection when you become aroused.
Possible side-effects can include nasal congestion, headaches, facial flushing, slight vertigo, a pounding heartbeat and blurred vision. However, side effects are rare, and most people don’t get any. Side effects may vary from one person to the next, as with any medication. You should always read the manufacturer’s Patient Information Leaflet (PIL) before taking this or any other medication.
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