Men with erectile dysfunction have several effective options, ranging from prescription medications and over-the-counter supplements to lifestyle changes and newer topical treatments. The right choice depends on what’s causing the problem, since ED can stem from blood flow issues, low testosterone, medication side effects, or psychological factors. Here’s a practical breakdown of what’s available and what the evidence actually supports.
Prescription Oral Medications
PDE5 inhibitors are the most widely prescribed and well-studied treatment for ED. These drugs work by relaxing blood vessels in the penis, making it easier to get and maintain an erection when you’re sexually aroused. They don’t create arousal on their own. The four options currently available are sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and avanafil (Stendra).
The main differences between them come down to timing. Sildenafil and vardenafil typically work within 30 to 60 minutes and last four to six hours. Avanafil can kick in as fast as 15 minutes. Tadalafil lasts up to 36 hours and can also be taken as a low daily dose, which means you don’t have to plan around a pill. All four require a prescription and work best on an empty or light stomach (except tadalafil, which isn’t affected much by food).
Serious Interactions to Know About
PDE5 inhibitors are generally safe, but they carry real risks if combined with certain other drugs. The most dangerous interaction is with nitrates, medications commonly prescribed for chest pain. Taking both at the same time can cause a severe, potentially life-threatening drop in blood pressure. This applies to all forms of nitrates, including pills, patches, and sprays.
Alpha-blockers, often prescribed for enlarged prostate or high blood pressure, can also cause problems. Both alpha-blockers and PDE5 inhibitors lower blood pressure, and combining them can lead to dizziness, lightheadedness, or fainting. If you take blood pressure medication of any kind, your prescriber needs to know before writing a script for ED drugs.
Some medications used to treat HIV can dramatically increase how much of the drug stays in your system. One strong antiviral, for example, raises sildenafil levels in the blood by roughly 11 times, which means the dose needs to be significantly reduced. Rare but serious side effects include erections lasting more than four hours (which require emergency treatment to prevent permanent damage) and sudden vision loss in one or both eyes.
Topical Gel: A Newer Over-the-Counter Option
Eroxon is a non-prescription topical gel cleared by the FDA that works differently from pills. It contains no medication. Instead, the gel is applied directly to the tip of the penis, where its alcohol and water base evaporates quickly, creating a cooling sensation followed by a warming effect. This temperature shift stimulates local nerve endings and increases blood flow.
In clinical testing, about 63% of men noticed an erection within 10 minutes of application, and roughly 56% were able to have penetrative sex within 15 minutes. Each single-use tube contains about 300 mg of gel. It’s a reasonable first step for men with mild ED who want to try something without a prescription, though it’s less studied than oral medications for moderate or severe cases.
Testosterone Replacement
If your ED is linked to low testosterone, replacing that hormone can help. About 65% of men with clinically low testosterone see improvement in erectile function with testosterone replacement therapy, which is available as injections, gels, patches, or pellets. The exact testosterone level that’s “too low” for healthy erections isn’t precisely defined, but most doctors consider treatment when blood levels fall below a standard threshold and symptoms like low libido, fatigue, and difficulty with erections are present.
Testosterone therapy won’t help if your levels are already normal. It’s specifically for men whose bodies aren’t producing enough. A simple blood test, usually drawn in the morning when levels peak, can tell you where you stand.
Supplements With Some Evidence
Two amino acid supplements show promise for mild ED, though neither is as well-proven as prescription options. L-citrulline is converted by your kidneys into L-arginine, which then boosts production of nitric oxide, the same molecule that PDE5 inhibitors work through. Nitric oxide relaxes artery walls and improves blood flow. L-citrulline has been used in studies at doses up to 6 grams per day, though no optimal dose has been established for ED specifically. Some men prefer L-citrulline over taking L-arginine directly because it’s better absorbed and produces a more sustained rise in nitric oxide.
Yohimbine, derived from the bark of an African tree, has stronger clinical data behind it. A meta-analysis of randomized trials found that yohimbine was nearly four times more likely to improve erections than a placebo. Serious side effects were infrequent and reversible. That said, yohimbine can raise heart rate and blood pressure, so it’s not ideal for everyone, and the quality of over-the-counter yohimbine supplements varies widely.
Zinc and Testosterone
Zinc plays a direct role in testosterone production, and a deficiency can quietly undermine erectile function. In one study, young men placed on a low-zinc diet for 20 weeks saw their testosterone levels drop by nearly 75%. When elderly men with low zinc intake were given supplements, their testosterone levels almost doubled. Animal research has also shown that zinc supplementation improves both arousal and the ability to maintain an erection.
The catch is that zinc only helps if you’re actually deficient, and deficiency is surprisingly hard to diagnose. A normal blood zinc level doesn’t necessarily mean your body has enough stored in tissues and organs. Men who eat little red meat, shellfish, or legumes, or who drink heavily, are at higher risk of running low. Your body only holds two to three grams of zinc at any given time, so consistent dietary intake matters.
Diet and Lifestyle Changes
What you eat has a measurable effect on erectile function over time. In a randomized trial of 65 men with both metabolic syndrome and ED, those who followed a Mediterranean-style diet for two years showed significant improvements in both erectile function and blood vessel health compared to men on a different diet. Their markers of vascular inflammation also dropped. A separate trial involving 215 men with type 2 diabetes found that the Mediterranean diet group experienced significantly smaller declines in sexual function over time compared to a low-fat diet group.
The Mediterranean diet emphasizes vegetables, fruits, whole grains, nuts, olive oil, and fish while limiting red meat and processed foods. Its benefit for ED likely comes from improving the health of blood vessel linings, reducing inflammation, and supporting nitric oxide production. These are the same pathways that ED medications target, just through food instead of a pill.
Exercise matters too. Regular aerobic activity, even moderate walking, improves cardiovascular fitness and blood flow. Excess body fat converts testosterone into estrogen, so losing weight can raise testosterone levels naturally. Smoking damages blood vessels directly and is one of the most modifiable risk factors for ED. Cutting back on alcohol also helps, since heavy drinking suppresses testosterone and impairs nerve function.
Choosing the Right Approach
For most men, the practical starting point depends on severity. Mild, occasional difficulty might respond to lifestyle changes, L-citrulline, or a topical gel like Eroxon. Moderate to severe ED that’s affecting your quality of life typically calls for a PDE5 inhibitor, which remains the most reliable option. If low libido is part of the picture, getting testosterone levels checked is worth doing early, since treating a hormonal cause can make other treatments work better.
Many men end up combining approaches. A prescription medication handles the immediate problem while diet, exercise, and weight loss address the underlying vascular health that caused it. ED is often an early warning sign of cardiovascular disease, sometimes appearing three to five years before a heart event. Treating it isn’t just about sex. It’s a signal worth paying attention to.