Other warning signs of an unsafe online pharmacy include outdated medication, no customer service, or suspiciously low prices. Follow-up support: Make sure you can get the help you need if questions or concerns arise after ordering. Tadalafil was found to have similar benefits for lower urinary tract symptoms as the usually prescribed tamsulosin. Subsequently, the FDA approved both vardenafil [27] and tadalafil in Cialis is also highly effective in reducing the symptoms of BPH. The trade-off is that the higher the strength, the greater the chance of side-effects and adverse events. Why is it called generic Cialis?Quoted prices are for cash-paying customers and are not valid with insurance plans. This price guide is based on using the discount card which is accepted at most U.S. pharmacies. A generic version of Cialis is available. . The lowest price on for generic Cialis (tadalafil) 20 mg is $ per tablet for 88 tablets at PharmacyChecker-accredited online pharmacies. You save 99% off the average U.S. pharmacy retail price of $ per tablet for 90 tablets. Lowest U.S. Pharmacy Coupon Price: $ per tablet for 90 tablets. 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.