Levitra general information
What is Levitra used for?
Levitra tablets 20mg are used to treat erectile dysfunction (impotence) in men, which is inability to achieve or maintain a hard erect penis suitable for sexual activity, due to insufficient blood flow into the penis. Levitra tablets 20mg relax the blood vessels in the penis increasing blood flow and causing an erection, which is the natural response to sexual stimulation. However, Levitra tablets 20mg will only work if you are sexually aroused.
How does Levitra work?
Levitra tablets 20mg contain vardenafil which acts on the erectile tissue of the penis to increase blood flow to cause an erection. During sexual stimulation nitric oxide is released in the erectile tissue of the penis which activates the enzyme guanylate cyclase.
This enzyme increases levels of a chemical called cyclic guanosine monophosphate (cGMP), which relaxes the blood vessels in the penis and allows blood to fill the spongy erectile tissues to cause an erection. Another enzyme called phosphodiesterase type 5 (PDE5) breaks down cGMP preventing blood flow into the penis, which causes loss of an erection. Levitra tablets 20mg inhibit the action of PDE5 which resolves erectile dysfunction by allowing the natural process of sexual stimulation to activate the cGMP mechanism for achieving and maintaining an erection.
How long does Levitra last?
Levitra tablets 20mg should be taken within an hour of planned sex and in most cases it helps you to get an erection in about 30 minutes that will last for around 4 hours, provided you are sexually aroused. Levitra tablets 20mg do not work if you are not aroused.
What does Levitra contain?
Levitra tablets 20mg contain the active ingredient vardenafil, which resolves erectile dysfunction (impotence) in men, by increasing blood flow into the penis. They also contain crospovidone, magnesium stearate, microcrystalline cellulose, colloidal anhydrous silica, macrogol 400, hypromellose, titanium dioxide (CI77891), iron oxide yellow (CI77492), iron oxide red (CI77491).
What are the side effects of Levitra?
The most commonly reported side effects when taking Levitra tablets 20mg include, headache, dizziness or light-headedness, flushing, nasal congestion, dyspepsia (heartburn), nausea. Less common side effects include, visual disturbance, increased tear formation causing watery eyes, changes in blood pressure (hypo and hypertension), sleepiness, dyspnoea (shortness of breath), pain (in the back joints, abdomen).
When should Levitra not be used?
You should not use Levitra tablets 20mg if you:
are allergic to vardenafil or any ingredient in Levitra tablets 20mg
are taking any nitrate medication, such as nitroglycerin for angina, as it may lead to a severe drop in blood pressure
have liver or kidney disease
have a condition where sexual intercourse inadvisable due to cardiovascular or heart problems or you have had a heart attack or stroke in the last 6 months
have abnormally high or low blood pressure
have an eye disease like non-arteritic anterior ischaemic optic neuropathy (NAION), which causes loss of vision, or if you have retinitis pigmentosa
are taking medication that may interact with Levitra or may increase your risk for side-effects, including cimetidine for treating ulcers, antibiotics like erythromycin and rifampicin, verapamil or diltiazem (for high blood pressure), ritonavir or saquinavir (for HIV), itraconazole or ketaconazole (for fungal infections) alpha-blockers like terazosin, tamsulosin and prazosin for enlarged prostate
Missed dose of Levitra
You should only take a Levitra tablets 20mg when you plan to have sex; it is not intended as a regular medication.
How should Levitra be stored?
You should keep your Levitra tablets 20mg in their blister pack until used and store in a cool, dry place where the temperature stays below 30°C.
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