Cialis vs. Viagra
| DRUGS | Cialis | Viagra |
| Manufacturer | Ei Lilly | Pfizer |
| Date Introduced | Feb 2003 | March 1998 |
| Dosage | 5mg,10mg,20mg | 50mg,100mg |
| Average
Approx. Absorption Rate (time until active) |
20 Minutes | 40 Minutes |
| Duration Of Effectiveness | 36 Hours | 4 Hours |
| Reported Side Effects | Headache, Myalgia, Dyspepsia, Back Pain | Congestion,
Diarrhea, |
| Contraindications |
Any Nitrate-Based Medicine, Angina, Hypertension, Hypotension | Any Nitrate-Based Medicine |
