The most effective option is a class of prescription medications that includes sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and avanafil (Stendra). These are the gold standard for getting and maintaining an erection, and they work for the majority of men who try them. Beyond prescriptions, certain supplements, lifestyle changes, and even addressing psychological factors can all make a real difference, depending on what’s causing the problem.
How Erections Work (The Short Version)
An erection is fundamentally a blood flow event. When you’re aroused, nerves in the penis release a chemical signal called nitric oxide. That signal triggers a chain reaction that relaxes the smooth muscle inside the penis, allowing arteries to open wide and fill the tissue with blood. A molecule called cGMP keeps those muscles relaxed and the blood flowing in. The body also produces an enzyme that breaks cGMP down, which is what eventually ends the erection.
Most erection problems come down to a disruption somewhere in that chain: not enough blood flow, not enough nitric oxide, hormonal issues, nerve damage, or psychological factors that interrupt the arousal signal before it even starts.
Prescription ED Medications
The four FDA-approved pills all work the same way. They block the enzyme that breaks down cGMP, so once arousal triggers nitric oxide release, the erection-sustaining signal sticks around longer. They don’t create arousal out of thin air. You still need to be turned on for them to work.
Here’s how they compare:
- Sildenafil (Viagra): Kicks in within 30 to 60 minutes, lasts four to five hours.
- Tadalafil (Cialis): Kicks in within 30 to 45 minutes, lasts 24 to 36 hours. This is the one people call the “weekend pill.” It can also be taken daily at a low dose for around-the-clock readiness.
- Vardenafil (Levitra): Kicks in within 30 to 60 minutes, lasts four to five hours. Similar profile to sildenafil.
- Avanafil (Stendra): The fastest, working in as little as 15 minutes, lasting six to 12 hours.
Doctors typically start you on a lower dose and adjust upward if needed. These medications are available through your regular doctor, a urologist, or telehealth platforms that now make the process relatively quick and private.
Who Should Not Take Them
If you take nitrate medications for chest pain or heart conditions (nitroglycerin, isosorbide), ED pills are off the table. Combining the two can cause a dangerous, potentially fatal drop in blood pressure. This also applies to recreational “poppers” (amyl nitrite), which interact the same way. If you take alpha-blockers for blood pressure or prostate issues, ED pills can still be used, but your dose needs to be carefully managed to avoid lightheadedness or fainting. Certain antifungal medications, some antibiotics, and HIV medications can also amplify the effects of ED drugs, so always disclose what you’re taking.
Supplements That Have Some Evidence
If you’re looking for something available without a prescription, the options are less powerful but not useless for mild cases.
L-citrulline is an amino acid your body converts into L-arginine, which then gets converted into nitric oxide, the same molecule that kicks off the erection process. Clinical evidence suggests it can ease symptoms of mild to moderate ED. It doesn’t work nearly as well as prescription medications, but it’s generally safe. Doses in studies have gone up to 6 grams per day, though no official optimal dose has been established.
Korean red ginseng (Panax ginseng) has been studied in multiple trials. A review in the World Journal of Men’s Health found that men taking ginseng were about 2.5 times more likely to report being able to have intercourse compared to those taking a placebo. That sounds impressive, but the overall quality of the evidence is low, and the actual improvement in erectile function scores was modest. It’s probably worth trying if you want to avoid prescriptions, but set your expectations accordingly.
Watch Out for Gas Station Pills
Those flashy “male enhancement” supplements sold at gas stations, convenience stores, and online are a genuine safety concern. A study analyzing products sold in the Sacramento area found that 67% were secretly laced with at least one pharmaceutical ED drug. Sildenafil was found in 74% of adulterated samples, tadalafil in 59%, and 60% contained two or more hidden drugs. Some contained compounds that have never been tested in humans. You’re essentially taking an unknown dose of a prescription medication without knowing it, which is especially dangerous if you’re on nitrates, blood pressure drugs, or have heart problems.
Lifestyle Changes That Improve Erections
Exercise is one of the most underrated tools. A review covered by Harvard Health found that men who did aerobic exercise for 30 to 60 minutes, three to five times per week, saw meaningful improvement in erectile function compared to men who didn’t exercise. The effect is strong enough that researchers have compared it to the benefit of medication. Cardio improves blood vessel health, lowers blood pressure, reduces inflammation, and boosts nitric oxide production, all of which directly support erections.
Diet matters too. A Mediterranean-style eating pattern, heavy on vegetables, fruits, whole grains, nuts, olive oil, and fish, has been linked to better erectile and blood vessel function. In a two-year randomized trial of men with metabolic syndrome and ED, those following this diet showed significant improvements in both erectile function and the health of their blood vessel linings, along with reduced inflammation. You don’t need to overhaul your entire life overnight, but consistently eating more plants and healthy fats while cutting back on processed food creates real, measurable changes in vascular health over time.
Other basics that matter: getting enough sleep, limiting alcohol (a drink or two is fine, but heavy drinking suppresses erections), quitting smoking (which damages blood vessels directly), and managing stress. These aren’t sexy answers, but they address root causes rather than just masking symptoms.
Check Your Testosterone
Low testosterone can contribute to weak erections, though it’s more commonly associated with low libido than with the erection itself. The American Urological Association defines low testosterone as a total level below 300 ng/dL, confirmed by two separate morning blood draws. If your levels are genuinely low and you’re experiencing symptoms like reduced sex drive, fatigue, or difficulty maintaining erections, testosterone replacement therapy may help. But testosterone alone doesn’t fix ED for most men. It’s one piece of a larger picture.
When It’s a Mental Game
Performance anxiety is one of the most common causes of erection problems in younger men, and it creates a vicious cycle: you lose your erection once, then you worry about it happening again, and that worry makes it happen again. The physical equipment works fine, but the brain is sending the wrong signals.
Several approaches can break the cycle. Open communication with your partner takes the pressure off and prevents them from internalizing the issue. Broadening your definition of sex beyond penetration, using hands, mouths, or toys, removes the all-or-nothing pressure on your erection. Talk therapy or certified sex therapy can help if the anxiety connects to deeper relationship issues or past experiences. And sometimes, just having a prescription ED medication available as a backup provides enough confidence to resolve the anxiety entirely, even if you never actually take the pill.
For many men, the best results come from combining approaches: a prescription or supplement to handle the immediate problem, lifestyle changes to address the underlying cause, and psychological strategies if anxiety is part of the picture.