Has permitted multiple “interactions” in one night. You could be having a serious side effect. Alcohol, however, may reduce its effects. Read our ls for details. Levitra is available to purchase online , but users should consider the above points and check with their health provider first. This is because there is a chemical in grapefruit juice which can increase the amount of vardenafil in your bloodstream and make side-effects more likely. · Since Levitra is used as needed, you are not likely to be on a dosing schedule. Do not take Levitra more than once a day. Allow 24 hours to pass between . Both Viagra and Cialis can be taken 30 minutes before sexual activity. However, Cialis lasts much longer and is noteworthy for the amount of time it remains in . Levitra takes about 30 minutes to start working and the effects last a little longer than Viagra, about 5 hours. Staxyn dissolves in your mouth. It contains the same active .