- Cialis, which is an oral medication for men designed to treat erectile dysfunction, works by increasing blood flow to and relaxing the muscles around the penis. Both of these factors produce a stronger, longer-lasting erection.
- Cialis is taken prior to the commencement of sexual activity, normally within one hour before the start of sexual activity. A single pill is taken with a glass of water. Cialis can be taken with or without food. In the event of an upset stomach, it is indicated that Cialis be taken with food.
- Although side effects from Cialis are rare, they can occur. Upset stomachs and mild nausea are some of the mild side effects that can occur, especially in new users of the drug. A less common, but more severe, side effect is the impairment of vision. In some users, Cialis has been shown to decrease blood flow to the optic nerve serving the eye, which can impair vision. It is recommended that Cialis be discontinued if this occurs.
