The drug is approved for use in adults. What is Viagra? Viagra can be taken as long as four hours or as little as 30 minutes before sex. One of the best forms to get Ginseng through is within pill format. Found growing in China, this herb has been used for centuries as a natural memory booster, but new evidence has come to light that Ginkgo Biloba can be used for treating male impotence, and much more effectively than Cialis. · Cialis Descriptions Tadalafil is used to treat men who have erectile dysfunction (also called sexual impotence). Tadalafil belongs to a group of medicines . Common Cialis side effects may include: headache; flushing (warmth, redness, or tingly feeling); nausea, upset stomach; stuffy nose; or. muscle pain, back pain, pain in your arms, legs, or back. This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. heart attack symptoms – chest pain or pressure, pain spreading to your jaw or shoulder, nausea, sweating. Common tadalafil side effects may include: headache; flushing (warmth, redness, or tingly feeling); nausea, upset stomach; stuffy nose; or. muscle pain, back pain, pain in your arms, legs, or back. This is not a complete list of side.