Vidalista 40 is a medication used to treat erectile dysfunction (ED), a common condition in men characterized by the inability to achieve or maintain an erection during sexual activity. The active ingredient in Vidalista 40 is Tadalafil, which belongs to a class of medications known as phosphodiesterase type 5 (PDE5) inhibitors.

Tadalafil works by relaxing the blood vessels in the penis, allowing increased blood flow to facilitate an erection when sexually stimulated. It does not cause spontaneous erections; sexual arousal is still necessary for the medication to be effective.

The recommended starting dose of Fildena 100 is usually one tablet taken orally with water, about 30 minutes to an hour before anticipated sexual activity. The effects of Vidalista 40 can last for up to 36 hours, which is why it's often referred to as the "weekend pill."

It's essential to follow your doctor's instructions and dosage recommendations regarding Vidalista 40 or any other medication containing Tadalafil. Also, inform your doctor about any other medications you are taking to avoid potential interactions.