Therefore the use of such treatments in combination with Cialis is not recommended. What special precautions should I follow? In , the Phase 2 clinical studies were initiated for males experiencing ED, then progressed to the Phase 3 trials that supported the drug’s FDA approval. Society and culture[ edit ] Marketing[ edit ] Cialis 5mg UK pack of 28 tablets In the United States, the FDA relaxed rules on prescription drug marketing in , allowing advertisements targeted directly to consumers. There are many other treatments for erectile dysfunction.DRUG_DESCRPTION Compare DRUG_NAME prices and find coupons that could save you up to 80% instantly at pharmacies near you such as CVS, Walgreens, Walmart, and . (Generic Cialis) 30 tablets 5mg. $ with free Coupon. Get Free: Coupon. sildenafil (Generic Revatio, Viagra) 30 tablets mg. $ with free Coupon. Get Free: . Cialis lasts up to 36 hours in the body, while Viagra lasts 4–6 hours in the body. Both are taken 30 minutes before sex. Cialis can cause limb pain, while Viagra can cause vision change, rash.