Levitra is a prescription medication used to treat erectile dysfunction (ED). Its active ingredient, vardenafil, belongs to a class of drugs called PDE5 inhibitors, the same family that includes Viagra and Cialis. It’s taken about 60 minutes before sexual activity and is available in 5 mg, 10 mg, and 20 mg tablets.
How Levitra Works
An erection depends on blood flowing into the penis and staying there long enough for sex. Your body manages this process through a signaling molecule called cGMP, which relaxes the smooth muscle in penile blood vessels so they can widen and fill with blood. Normally, an enzyme called PDE5 breaks down cGMP after a short time, ending the erection.
Levitra blocks that enzyme. By preventing PDE5 from doing its cleanup job, the drug lets cGMP accumulate longer, keeping blood vessels dilated and making it easier to achieve and maintain an erection. It doesn’t create arousal on its own. Sexual stimulation is still needed to trigger the release of cGMP in the first place.
Dosage and Timing
The standard starting dose for adults under 65 is 10 mg, taken roughly one hour before sexual activity. For adults 65 and older, the usual starting point is 5 mg. Depending on how well it works and how you tolerate it, the dose can be adjusted up to a maximum of 20 mg. You should not take it more than once per day.
Levitra comes in two forms: a standard tablet that you swallow with water and an orally disintegrating tablet (sold under the brand name Staxyn) that dissolves on the tongue. Both are now available in generic versions, which tend to cost significantly less than the brand-name products. The half-life of vardenafil is approximately 4 to 5 hours, meaning its effects taper off over that window.
Common Side Effects
Most side effects are mild and tied to the same blood-vessel-relaxing action that makes the drug work. In clinical trials involving over 2,200 patients, the most frequently reported issues were:
- Headache: 15% of patients (vs. 4% on placebo)
- Flushing: 11% (vs. 1% on placebo)
- Stuffy or runny nose: 9% (vs. 3% on placebo)
- Indigestion: 4% (vs. 1% on placebo)
- Dizziness: 2% (vs. 1% on placebo)
- Nausea: 2% (vs. 1% on placebo)
Back pain showed up in about 2% of patients, though that was nearly identical to the placebo group. Overall, only 3.4% of trial participants stopped taking Levitra because of side effects, compared to 1.1% on placebo. For most people, these effects are temporary and resolve within a few hours as the drug leaves the system.
Who Should Not Take Levitra
The most important safety rule with Levitra is simple: do not combine it with nitrate medications. Nitrates are commonly prescribed for chest pain (angina) and come in many forms, including tablets, sprays, and patches. Because both nitrates and Levitra relax blood vessels, using them together can cause a sudden, dangerous drop in blood pressure that could lead to dizziness, fainting, or in serious cases a heart attack or stroke. This applies whether you use nitrates daily or only occasionally.
People with certain cardiovascular conditions may need careful evaluation before using Levitra, since sexual activity itself puts some demand on the heart. Liver problems can also affect how quickly your body processes the drug, potentially requiring a lower dose. Your prescriber will factor in your full medication list and health history before writing a prescription.
How Levitra Compares to Viagra and Cialis
All three medications work through the same mechanism: blocking PDE5 to keep blood vessels in the penis relaxed. The practical differences come down to timing and flexibility.
Levitra and Viagra (sildenafil) are similar in profile. Both are taken about 60 minutes before sex, and both have effects that last roughly 4 to 5 hours. Cialis (tadalafil) stands apart with a much longer duration of action, sometimes up to 36 hours, and is also available in a low daily dose for men who prefer not to plan around a pill. That longer window gives Cialis more spontaneity but also means side effects can linger longer if they occur.
One area where they differ slightly is sensitivity to food. High-fat meals can slow the absorption of both Viagra and Levitra, potentially delaying onset. Cialis is generally less affected by food. For someone who wants a reliable option that works within a defined window and doesn’t need all-day coverage, Levitra occupies a similar niche to Viagra. Choosing between them often comes down to individual response, side effect tolerance, and cost, since generic versions of all three are now available.
Tips for Getting the Best Results
Timing matters. Taking Levitra on a relatively empty stomach, or at least avoiding a heavy, greasy meal beforehand, helps your body absorb it faster and more predictably. Alcohol in moderation is generally fine, but heavy drinking can both worsen side effects like dizziness and make ED itself harder to manage.
If the starting dose doesn’t seem effective after a few attempts, that’s worth a conversation with your prescriber. Some men respond better at 20 mg, while others do well at 5 mg with fewer side effects. It’s also worth noting that Levitra, like all PDE5 inhibitors, requires sexual arousal to work. It won’t produce an erection on its own, so don’t expect results from the pill alone without any stimulation.