Cialis,Viagra Library

The drug Levitra works by blocking an enzyme called phosphodiesterase-5 or PDE-5 thus helping the smooth muscles of the penis to relax and effectively increase the flow of blood to the penis. This helps to achieve an erection that lasts. After completion of excitement and sexual activity, blood flow to the penis decreases, giving the latter its normal size and shape. Levitra will not give a man an erection spontaneously, it only helps a man get an erection when he is sexually stimulated, the same way as viagra or cialis work. Manufacturers have experimented with the drug Levitra over 3750 men in clinical trials worldwide. If Levitra is taken with the recommended dosage, side effects of Levitra are mild and transient. The side effects of Levitra the most common are headaches and bouffes heat. Levitra must be taken 25 to 60 minutes before the report (or more if taken during a meal rich in fat), and you should avoid grapefruit juice. Also levitra has some against-indications like angina pectoris or heart failure, severe allergy to a component or sub-nitrates, hepatic or renal dysfunction, hypotension, recent myocardial infarction, stroke, retinitis pigmentosa.