WebOct 12, · How Cialis Works. Tadalafil and other PDE5 inhibitors primarily work by inducing muscle relaxation. Tadalafil stops the breakdown of a chemical responsible for .Also tell your doctor if you or any of your family members have or have ever had an eye disease such as retinitis pigmentosa an inherited eye condition that causes loss of vision or if you have ever had sudden severe vision loss, especially if you were told that the vision loss was caused by a blockage of blood flow to the nerves that help you see. If you have certain health conditions or are taking certain medications, your doctor may tell you to take tadalafil less often or may prescribe a lower dose to be taken once a day. Tadalafil is also sometimes taken once a day every day without regard to timing of sexual activity. This leads to shortness of breath when exercising or completing regular daily activities. Though this growth is not cancerous, prostate cancer and BPH can co-occur. If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately or get emergency medical treatment, and avoid sexual activity until your doctor tells you otherwise. Ask your doctor if you are not sure whether any of your medications contain nitrates.WebWays to save on Cialis. These programs and tips can help make your prescription more affordable. Fill a Day Supply to Save. You may be able to lower your total cost by . WebMar 22, · Common Cialis side effects may include: headache; flushing (warmth, redness, or tingly feeling); nausea, upset stomach; stuffy nose; or. muscle pain, back . WebOct 12, · How Cialis Works. Tadalafil and other PDE5 inhibitors primarily work by inducing muscle relaxation. Tadalafil stops the breakdown of a chemical responsible for .What special precautions should I follow? If you are taking tadalafil for erectile dysfunction on a regular schedule, take the missed dose as soon as you remember it. Tadalafil is also sometimes taken once a day every day without regard to timing of sexual activity. Sexual activity may be a strain on your heart, especially if you have heart disease. If you are already taking medication to treat BPH, your doctor may tell you to stop taking your other medication at least one day before starting treatment with tadalafil.