Cialis is the trade name and generic name for tadalafil, which has no time-delaying properties. Tadalafil treats erectile dysfunction in men and requires sexual stimulation to be effective. The drug does not have a time-delaying effect. Premature ejaculation can be treated with selective 5-HT reabsorption inhibitor drugs such as dapoxetine and paroxetine, or with topical application of lidocaine spray or ointment to the penis to prolong the ejaculatory latency period through local anesthetic effects. Common adverse reactions to Tadalafil are headache and indigestion. This drug is contraindicated if you are taking nitrates, such as isosorbide nitrate and nitroglycerin. People who are allergic to tadalafil are prohibited from taking this drug. In addition, patients with heart disease and severe cardiovascular disease should be concerned about the normal function of the heart and blood vessels when continuing to take tadalafil. All the above drugs are prescription drugs.