Medicines are sometimes prescribed for conditions other than those described in patient information leaflets. Do not use LEVITRA for a condition for which it was not prescribed. Do not give LEVITRA to other people, even if they have the same symptoms that you have. The most common side effects with LEVITRA are headache, flushing, stuffy or runny nose, indigestion, upset stomach, dizziness or back pain. Call your doctor if you get a side effect that bothers you or one that will not go away.
Just like any other medicine, these drugs can have side effects. If you purchase them online -- without a prescription -- you won't get a chance to discuss this with your doctor before you take them. Whether you’re in the US or Canada, you need a valid prescription to purchase Levitra or Vardenafil. The prescription must be written and signed by a licensed healthcare provider. Yes, you need a prescription for Levitra (Vardenafil), a drug used to treat erectile dysfunction.
LEVITRA 20 mg caused an additional time-related reduction in blood pressure and increase in heart rate in association with NTG administration. The blood pressure effects were observed when LEVITRA 20 mg was dosed 1 or 4 hours before NTG and the heart rate effects were observed when 20 mg was dosed 1, 4, or 8 hours before NTG. Levitra must not be used in people who are hypersensitive (allergic) to vardenafil or any of the other ingredients.

What Precautions Should I Take?

Concomitant administration with strong CYP3A4 inhibitors (such as ritonavir, indinavir, cobicistat, ketoconazole) or moderate CYP3A4 inhibitors (such as erythromycin) increases plasma concentrations of vardenafil. Dosage adjustment is necessary when LEVITRA is administered with certain CYP3A4 inhibitors [see DOSAGE AND ADMINISTRATION and DRUG INTERACTIONS]. Rare but serious side effects may include priapism (a prolonged and painful erection), sudden hearing loss, BUY XANAX WITHOUT PRESCRITION or vision changes.
If you do not understand the information, or have questions, talk with your doctor or pharmacist. In a healthy volunteer study of elderly males (≥65 years) and younger males (18–45 years), mean Cmax and AUC were 34% and 52% higher, respectively, in the elderly males [see Use In Specific Populations]. Do not use LEVITRA in patients on renal dialysis as vardenafil has not been evaluated in such patients. Do not use LEVITRA in patients on renal dialysis, as vardenafil has not been evaluated in this population [see DOSAGE AND ADMINISTRATION and Use In Specific Populations]. LEVITRA (10 mg and 20 mg) did not potentiate the increase in bleeding time caused by aspirin (two 81 mg tablets). Seizure, seizure recurrence and transient global amnesia have been reported postmarketing in temporal association with vardenafil.

For most individuals, the recommended dose of vardenafil regular tablets is 10 mg per day taken 60 minutes before intercourse. If there is no response or side effects, the dose may be increased to 20 mg or, if there are side effects, it may be reduced to 5 mg. If you experience symptoms of nausea, dizziness, chest pain or arm pain upon initiation of sexual activity after taking this medication, you should refrain from further activity and call your care team as soon as possible.

What Are Side Effects of Levitra?

The dose may be increased to a maximum recommended dose of 20 mg or decreased to 5 mg based on efficacy and side effects. In another double-blind, placebo controlled clinical trial, at least 15 doses of 20 mg vardenafil were administered over 8 weeks versus placebo to 52 males. Thirty-two (32) males (62%) of the patients completed the trial. Retinal function was measured by ERG and FM-100 test 2, 6 and 24 hours after dosing. The trial was designed to detect changes in retinal function that might occur in more than 10% of patients. Vardenafil did not produce clinically significant ERG or FM-100 effects in healthy men compared to placebo.
Vardenafil may cause a rare, dangerous heart rhythm problem called QT prolongation. Some people may have a higher risk of this, including people born with long QT syndrome and those taking certain medicines for heart rhythm problems. Tell your healthcare provider right away if you faint or have changes in your heart rate or rhythm, such as a fast or skipping heartbeat. In rare instances, men taking PDE5 inhibitors (oral erectile dysfunction medicines, including LEVITRA) reported a sudden decrease or loss of vision in one or both eyes.
Vardenafil is present in rat milk of lactating rats (see Data). Inform patients that Levitra is contraindicated in patients who use guanylate cyclase stimulators, such as riociguat. Patients with left ventricular outflow obstruction, (for example, aortic stenosis and idiopathic hypertrophic subaortic stenosis) can be sensitive to the action of vasodilators including PDE5 inhibitors.
Levitra effectively relaxes the muscles on the blood vessel walls, increasing blood flow to the penis and causing an erection. Levitra relaxes blood vessel wall muscles and increases blood flow to the penis. This will assist a man in obtaining and maintaining an erection.