Cialis is one of the most popular erectile dysfunction treatments available today. It can be bought online without a prescription from an online pharmacy in Netherlands https://www.cialis-kopen-nederland.com. Cialis works by increasing blood flow to the penis, making it easier to achieve and maintain an erection. The active ingredient in Cialis, tadalafil, belongs to a class of medications called phosphodiesterase type 5 inhibitors. These medications are also used to treat pulmonary arterial hypertension and benign prostatic hyperplasia. Cialis is available in tablet form and should be taken 30-60 minutes before sexual activity. It can be taken with or without food and should not be taken more than once per day. Cialis may cause side effects, including headache, dyspepsia, back pain, myalgia, and flushing. Most side effects are mild and go away on their own. However, if you experience any persistent or bothersome side effects, you should speak to your doctor or healthcare provider.