Vigora 100 tablet is commonly used to treat sexual problems in men. The ingredient in this medicine is sildenafil citrate, which works to relax the muscles by increasing the blood flow in the penile arteries. This medicine should only be taken by men above 18 years of age. This medicine can be taken before or after food. The effect of this medicine is seen in about 30 minutes. You can use this medicine 1 hour before sexual activity to enjoy a good erection. Cold drinks or alcohol should not be consumed while taking this medicine as its side effects can be seen on your body.