Up to 40% of men who try Viagra (sildenafil) or Cialis (tadalafil) don’t get a satisfactory response. If you’re one of them, you have several well-established options, from simple adjustments to your current pills all the way to surgical solutions with high satisfaction rates. The key is understanding why the pills aren’t working for you, because the cause shapes what to try next.
Make Sure the Pills Actually Failed
Before moving on to other treatments, it’s worth confirming that oral medications truly don’t work for you, rather than that they weren’t given a fair shot. Sildenafil works best about 1.5 to 2 hours after you take it, with success rates for completing intercourse peaking at nearly 93% in that window. By 10 hours after taking it, that rate drops to about 82%. Many men take it too early or too late.
A high-fat meal can delay sildenafil’s absorption, though research suggests the overall effect on efficacy is modest. More importantly, adequate sexual stimulation is required for any of these drugs to work. They don’t create arousal on their own. They amplify the body’s natural response to arousal by helping blood vessels in the penis relax and widen. If you’ve only tried one medication, or only tried it once or twice, switching to another pill or adjusting your timing and dose is a reasonable first step. Sildenafil and tadalafil work through the same mechanism but have different absorption profiles, so one may succeed where the other didn’t.
Why These Medications Stop Working
Understanding the underlying cause helps you and your doctor choose the right next step. The most common reasons oral ED drugs fail fall into a few categories.
Low Testosterone
Viagra and Cialis work by boosting the effect of nitric oxide, a chemical that relaxes blood vessels in the penis. But testosterone plays a critical supporting role: it maintains the smooth muscle tissue in the penis and influences how much of the enzyme these drugs target is actually present. When testosterone is low, there’s less of that target enzyme available, so the drugs have less to work with. This is especially common in older men. Testosterone replacement therapy can restore the tissue changes caused by low levels and, in many cases, make ED pills effective again when they previously weren’t.
Diabetes and Nerve Damage
Chronically high blood sugar damages both nerves and blood vessels over time. Since erections depend on a coordinated response from both systems, this damage can be severe enough that oral medications can’t compensate. The same applies to nerve damage from prostate surgery or radiation therapy, where the signaling pathway these drugs rely on is physically disrupted.
Cardiovascular Disease and Medications
High blood pressure and heart disease compromise blood flow throughout the body, including the penis. Some medications used to treat depression or high blood pressure also cause or worsen ED as a side effect. If a medication you take for another condition is contributing to the problem, switching to an alternative (with your doctor’s guidance) can sometimes resolve things without adding new ED treatments.
Psychological Factors
Performance anxiety, depression, relationship stress, and past trauma can all cause or worsen ED. When the root cause is psychological, medication alone often falls short. If no clear physical cause is identified, or if ED happens in some situations but not others (for example, you get erections during sleep but not with a partner), a psychological component is likely involved. Psychotherapy, sometimes combined with medication or lifestyle changes, addresses the underlying issue rather than just the symptom.
Penile Injections
Injectable medications are the most common next step when pills fail, and they work differently. Instead of amplifying the body’s natural arousal response, these drugs act directly on the blood vessels in the penis, causing them to dilate and fill with blood. You inject a small amount of medication into the side of the penis using a very fine needle before sex.
The most widely used injectable is alprostadil, either alone or combined with two other vasodilators in a mixture sometimes called trimix. Success rates are significantly higher than oral medications: roughly 85% of men achieve adequate erections after finding the right dose, and the response rate overall exceeds 70%. For men whose ED is caused by nerve damage (after prostate surgery, for instance), the success rate approaches 100%.
The idea of a needle understandably gives most men pause, but the needle is small and users generally report that the discomfort is minimal. Alprostadil alone can cause a burning sensation in some men, which is one reason combination formulas exist. Your urologist will typically do a test injection in the office first to find the right dose and make sure you’re comfortable with the technique before you try it at home.
Urethral Suppositories
A less invasive alternative to injections is a small pellet of alprostadil inserted into the urethra (the opening at the tip of the penis) using a slim applicator. It delivers the same active medication but without a needle. The trade-off is that it’s generally less effective than injections. It can be a good option for men who want something beyond pills but aren’t ready for injections, though many men ultimately find injections more reliable.
Vacuum Erection Devices
A vacuum erection device (VED) is a plastic cylinder placed over the penis. A pump removes air from the cylinder, creating negative pressure that draws blood into the penis. Once the erection forms, you slide a constriction ring onto the base of the penis to maintain it, then remove the cylinder.
Among men who purchase and use these devices, satisfaction tends to be solid. In one study, 84% of users reported moderate to high satisfaction, and 43% achieved erection hardness scores of 3 or 4 on a 4-point scale (firm enough for penetration). The device requires no medication and has no systemic side effects, which makes it appealing for men who take multiple other medications or have health conditions that limit their options. The downsides are that the erection can feel less natural, the penis may be cool to the touch, and spontaneity is limited.
Penile Implants
For men who have tried other options without success, or who simply prefer a permanent solution, a penile prosthesis is the most definitive treatment. It involves a surgical procedure to place a device inside the penis that allows you to produce an erection mechanically.
There are two main types. A malleable (semi-rigid) implant consists of bendable rods placed inside the penis. You manually bend the penis up for sex and down to conceal it. It’s simpler, with fewer moving parts. An inflatable implant uses fluid-filled cylinders in the penis connected to a small pump placed in the scrotum. Squeezing the pump transfers fluid into the cylinders, creating an erection that looks and feels more natural. Pressing a release valve deflates it afterward.
Both types have high satisfaction rates, but the inflatable version consistently scores higher. In a comparative study of 130 men, those with inflatable implants reported significantly greater satisfaction with the device itself, with how well it met their expectations, and with their willingness to continue using it. None of the inflatable recipients expressed dissatisfaction with the device’s configuration, compared to about 16% of men with malleable implants. The procedure is irreversible in a practical sense, since it alters the internal structure of the penis, so it’s typically positioned as a final option after other treatments have been tried or discussed.
Shockwave Therapy
Low-intensity shockwave therapy delivers focused sound waves to the penile tissue, with the goal of stimulating new blood vessel growth and improving blood flow. It’s noninvasive, performed in an office setting, and requires no medication. The American Urological Association currently considers it investigational, meaning it shows promise but isn’t yet part of standard treatment guidelines.
That said, the clinical evidence is growing. A meta-analysis of randomized controlled trials supports mild to moderate improvement in erectile function across various causes of ED, including in men for whom medications didn’t work. In one trial of 60 men who had failed oral therapy, 70% in the treatment group showed meaningful improvement at six months, compared to just 10% in the placebo group. Another trial of 76 men who didn’t respond to pills found that 53% achieved erections firm enough for penetration after shockwave therapy, versus 28% in the control group. Results are encouraging but variable, and long-term durability data is still limited.
Lifestyle Changes That Support Treatment
Whatever next step you pursue, addressing the basics amplifies your results. Obesity, sedentary behavior, smoking, and excessive alcohol use all independently worsen erectile function by damaging blood vessels, reducing testosterone, or both. Weight loss in overweight men has been shown to improve erections even without adding new treatments. Regular cardiovascular exercise improves the blood vessel health that every ED treatment depends on. Managing blood sugar if you have diabetes slows the nerve and vascular damage that makes ED progressively harder to treat. These aren’t replacements for medical therapy when pills have already failed, but they create the conditions that give other treatments their best chance of working.