Drug Uses
Viagra is used for treating erectile dysfunction (e.g. male impotence). It works by helping the blood flow into the penis to achieve and maintain an erection during sexual stimulation.
Cialis is to treate male impotence (eg, men's erectile dysfunction). It is supposed to be used for other purposes.
Cialis' Benefits:
comparing to Viagra and Levitra, Cialis' effect lasts much longer - up to 48 hours. Besides, Cialis has fewer side effects;
Cialis is to be taken from 30 minutes to 12 hours before sex;
66% clients prefer Cialis to Viagra.
Cialis is to be used for daily use, so you can be ready anytime.
Levitra is an oral therapy for the treatment of erectile dysfunction. It can be also used for other purposes.
How to use
Viagra is to be taken 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Viagra is not supposed to be taken more often than once per day.
Cialis should be taken as directed by your doctor. Please check the label to detemine an exact dosing instructions.
Cialis is to be taken oral, with or without food.
Levitra should be taken as needed, about an hour before sexual activity. Some form of sexual stimulation is needed for an erection to occur with Levitra. Levitra should not be taken more than once daily. Allow 24 hours to pass between doses. Benefits:
Levitra can act in 16 minutes comparing to 30 to 60 minutes for Viagra;
Levitra can be taken with food, while Viagra should be taken on an empty stomach;
Levitra has no adverse side effects on heart or vision. Viagra is known to require more monitoring for these side effects;
Levitra lasted longer in clinical trials compared to Viagra;
Works for up to 6 hours;
Recommended time to take before sex is 25 to 45 minutes;
With Levitra, there are no food or alcohol restrictions. Romantic dinners are no longer out of the question;
Levitra has less side effects compared to Viagra and lasts about the same time as Viagra in the body.
Drug Class and Mechanism
Viagra is a phosphodiesterase type 5 inhibitor and it works by helping the blood flow into the penis to achieve and maintain an erection during sexual stimulation.
Cialis is a phosphodiesterase inhibitor type 5. It works by helping the blood flow into a penis to achieve and maintain an erection.
Levitra is a phosphodiesterase inhibitor that works by helping blood flow into a penis to achieve and maintain an erection.
Missed Dose
Viagra is to be used as necessary, so you are not supposed to take it according to a schedule.
If you miss a dose of Cialis and you still intend to engage in sexual activity, take it as soon as you remember. Continue to take it as directed by your doctor.
Levitra is to be used as needed, so you are not likely to miss a dose.
Storage
Viagra is to be kept in its original container. It is to be stored at room temperature between 59 and 86 degrees F (15-30 degrees C) away from moisture, heat and light and out of the reach of children.
Keep Cialis at room temperature away from moisture, heat and light (between 59 and 86 degrees F (15-30 degrees C)). Store this medication out of the reach of children.
Store at 25 degrees C (77 degrees F); excursions permitted to 15-30 degrees C (59-86 degrees F). Keep Levitra and all medicines out of the reach of children and away from moisture and heat.
