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. Brand names Why is this medication prescribed? Your healthcare provider may prescribe Cialis for daily use at a daily dosage of 2. Nitrates come as tablets, sublingual under the tongue tablets, sprays, patches, pastes, and ointments. You can take it at the same time every day, without any need to think about other factors. Erectile Dysfunction, though, is when your difficulty with getting an erection or staying hard becomes a regular occurrence. FDA encourages anyone aware of a serious side effect, including consumers or patients, to make a MedWatch report.Cialis has been a widely available medication since gaining FDA approval in The medication is marketed and distributed by the company Eli Lilly and is sold . Brand Cialis Generic Tadalafil No data Form Bottle Box Disp Pack Tablet No data Dosage mg 5mg 10mg 20mg No data Quantity 5 6 10 15 30 90 No data. Tadalafil is a medicine used to treat erectile dysfunction (ED, also called impotence) and problems with urination caused by an enlarged prostate (benign prostatic hypertrophy or BPH). It is sometimes known by its generic name tadalafil, and sometimes known by its trade name, Cialis. There are also other brands of this medicine available.