| Viagra works up to 4.5 - 5 hours |
Cialis works for up to 36 hours |
Levitra works for up to 5 hours |
| Viagra is taken 60 minutes before sex |
Cialis is taken 20 - 60 minutes
before sex |
Levitra is taken 25 - 60 minutes before sex |
| Side effects are similar - up to 10% of users experience headache, red face |
Side effects are similar - up to 10% of users experience headache, red face |
Side effects are similar - up to 10% of users experience headache, red face |
| Viagra tablets are easier to split |
Cialis is reported to be more effective for diabetics |
Levitra is reported to be more effective for diabetics |