This product is available in the following dosage forms: Suspension Tablet There is a problem with information submitted for this request. This is a serious condition that requires immediate medical attention. If you are taking tadalafil for erectile dysfunction on a regular schedule, take the missed dose as soon as you remember it. Tadalafil works on the PDE5 enzyme in the lungs to relax the blood vessels. Take all of the tablets for your daily dose at one time each day; do not divide the tablets to take as separate doses.Side Effects. Headache, stomach upset, back pain, muscle pain, stuffy nose, flushing, or dizziness may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To.  · It treats erection problems by increasing blood flow to the penis. It’s also used to treat symptoms of an enlarged prostate (benign prostatic hyperplasia or BPH). At $ for 30, 5MG Tablet, Cialis is an expensive prescription drug. You can lower the cost of Cialis to $ for 30, 20mg Tablet of generic Cialis. We have good news for you: generic Cialis, used to treat erectile dysfunction (ED)and enlarged prostates, just hit pharmacies. Prices for the generic, known as tadalafil, are more than 50% less than those of brand-name Cialis. As more men are able to afford tadalafil and treat their ED, it’s likely that many will have questions.