Which drug for erectile dysfunction?

These medications work by inhibiting the effects of the enzyme phosphodiesterase type 5 (PDE5). This enzyme breaks down a signaling molecule called cyclic guanosine monophosphate (cGMP), which plays a key role in relaxing smooth muscles and regulating blood flow to the erectile tissue of the penis. When cGMP is active, it triggers the release of nitric oxide, which causes blood vessels to widen. This allows blood to flow into the penis, expanding the corpora cavernosa and leading to a firmer, fuller erection. By breaking down cGMP, PDE5 stops the signal that allows blood vessels to relax, limiting blood flow and making erections harder to achieve.

What side effects can this medication cause?

Currently, it’s only available as the brand-name medication, with no generic option available for sale. Other ED medications exist besides these oral ones. Alprostadil (Caverject®) is an FDA-approved medication for ED that can be injected or used inside the urethra. Compounded medications like BiMix, TriMix, and QuadMix can also be used for ED and are given by injection or in the urethra—but know that compounded medications are not FDA-approved. All four of the oral medications listed above belong to a class of drugs called PDE5 inhibitors. PDE5 inhibitors work by blocking this enzyme, allowing cGMP levels to rise. As a result, blood vessels in the penis can dilate more fully, making it easier to get and maintain an erection. The other treatment options for ED work through a variety of processes, including dilating the blood vessels, stimulating the nerves of the penis, and pulling more blood into the penis with negative pressure. However, these options don’t treat the psychological side of ED, meaning they won’t help you to feel more sexually stimulated or increase your libido.

• Viagra Professional: Higher dosage options, for severe ED, under medical supervision, may have more pronounced effects.
• Viagra Soft Tabs: Faster dissolving tablets, designed for quick onset, enhance spontaneity, but should be used responsibly.
• Sildenafil Plus: Over-the-counter options with added vitamins, intended to improve blood flow, consult a healthcare provider.

And, after all, erectile dysfunction can certainly have physical and psychological causes.

Physical causes include heart and blood vessel disease, diabetes, atherosclerosis (clogged arteries), and damage to the penis or surrounding tissue, which can affect nerve function and blood flow. Psychological causes may include depression, feelings of guilt, sexual performance anxiety, and stress. Although these don’t physically reduce blood flow, they can affect a person’s comfort in sexual situations and response to stimulation. There is no single safest ED drug.

Related/similar drugs

These side-effect rates can differ from one drug to another, meaning one may be a more effective option for you than its alternatives depending on your personal needs and health profile. Below, we’ve explained how ED medications work, their potential side effects, and other key safety data that you should be aware of before using any medication to treat ED. Erectile dysfunction is a common form of sexual dysfunction that affects an estimated 30 to 50 million men in the United States alone. Studies estimate that as many as 40 percent of all men will deal with some level of erectile dysfunction by the age of 40 — and that rate only increases with age. But certain treatments can help manage the condition’s key symptoms.

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Erectile dysfunction medication has been around since the late 1990s, when the FDA approved Viagra as the first pill for treating ED (here is a guide on where to buy Viagra). Currently, there are four FDA-approved oral medications for ED: The active ingredient in Viagra, sildenafil, is the most well-known medication for erectile dysfunction. It’s designed for use at least one hour before sex and works for about four hours per dose. Sildenafil is available as the brand-name Viagra and as a generic version. It’s a popular choice that works well for most men affected by ED.

Effective treatments, trusted by over 500,000 men

The active ingredient in Viagra, sildenafil, is the most well-known medication for erectile dysfunction. The active ingredient in Cialis®, tadalafil, is an ED drug that offers relief for up to 36 hours per dose. This long duration of action has earned it the nickname, the “weekend pill.” Tadalafil is available as the brand-name Cialis and as a generic medication. It can be used as needed before sexual activity or taken daily at a reduced dosage to provide ongoing ED relief. The active ingredient in Levitra®, vardenafil, works similarly to sildenafil but has a slightly longer half-life. Viagra (sildenafil), Cialis (tadalafil), Levitra (vardenafil), Stendra (avanafil), and Caverject (alprostadil) are all FDA-approved for the treatment of erectile dysfunction and are safe for most men to use.

These medications for erectile dysfunction underwent extensive clinical testing to check that they’re safe and effective before the FDA approved them. This testing process involves multiple phases of clinical trials and thousands of participants. The FDA reviews the findings from these studies to ensure the drugs aren’t just effective, but also safe for patients to use. All FDA-approved ED medications have passed this process, meaning the FDA has determined that each is safe and effective for its intended use — in this case, treating erectile dysfunction.

Potential Side Effects:

This means it remains active in the body for longer. It’s only available as a generic medication. The active ingredient in Stendra®, avanafil, is a viagra click and collect second-generation medication for ED. It’s more selective in its effects than older ED drugs and starts working in as little as 15 minutes. It’s also less likely to cause some side effects. The safest medication for you depends on your health history, needs, and other factors.

• Sildenafil Oral Jelly: A gel form that acts faster than pills for some, available in certain markets.
• Sublingual Tablets: Placed under the tongue for faster absorption than swallowed pills.
• Custom Compounded Formulas: Specialized pharmacies can create tailored blends (e.g., Sildenafil + Tadalafil).
• Herbal Blends (e.g., MaxiMan): Often contain unverified ingredients; efficacy and safety are not guaranteed.
• Yohimbine HCL: Prescription alpha-blocker derived from bark; limited evidence, significant side effects.

You can work with a healthcare provider to determine which medication is best and least likely to cause side effects for you.

If you’ve searched for information about treating erectile dysfunction, you may have come across certain products marketed as over-the-counter alternatives to prescription ED medications.

These products include Rhino pills and other supplements that are sold in gas stations and other stores with no need for a visit to the doctor. The reality is that these products are almost always significantly less safe than FDA-approved prescription drugs for treating erectile dysfunction. Over the years, the FDA has investigated many of these products and found that they often include unlabeled, hazardous ingredients. Some contain the same ingredients as prescription erectile dysfunction pills in either unusually low or dangerously high amounts.

Comparing Which Lasts Longer

It's far too early to know whether sildenafil may someday help people with strokes. If you get your information about sildenafil from Super Bowl commercials or e-mail spam, you might dismiss it as a lifestyle drug of little real medical importance. In fact, it's a serious prescription medication that has helped millions of men who are distressed by an entirely legitimate medical problem. Because the drug acts on arteries beyond the penis, it can produce various side effects. That means it should only be prescribed by a personal physician who really knows you.

What can Viagra do to a young man?

And it also means that scientists are investigating uses for the drug in patients with an array of vascular disorders having nothing to do with sexual function. They have nearly identical effects on ED as well as similar side effects. Because they are newer drugs, scientists are just beginning to study them for problems that don't involve sexuality. Sildenafil has already been licensed to treat men and women with pulmonary hypertension. Time will tell if any of these drugs will fill other potentials beyond promoting potency.

Your questions answered

Safety is a key factor to consider before using any medication, and treatments for erectile dysfunction (ED) are no exception. Luckily, ED is a treatable issue with several well-known options, such as sildenafil (the active ingredient in Viagra®), tadalafil (Cialis®), and newer ED treatments, such as avanafil (Stendra®). The United States Food and Drug Administration (FDA) approves all of these medications. All of the FDA-approved ED medications on the market right now are safe for most men to use regularly. However, there are some side effects and drug interactions that you should be aware of before taking any medication for ED. Because these “ED pills” are not held to the same standards as regulated medications, they may be more likely to cause side effects, interactions, and other issues—even if you’re otherwise healthy.

Viagra side effects

But it may have other benefits for cardiac patients. In the first years of the Viagra era, research on sildenafil and the heart was devoted to making sure the drug was safe for the circulation. In most men with heart disease, it is. But several studies of patients with congestive heart failure also reported that the medication improves oxygen consumption, pulmonary artery pressure, and exercise capacity in these patients. Research shows that sildenafil helps the heart muscle relax properly, which could help patients with heart failure due to diastolic dysfunction.

What strengths does Viagra come in?

Another interesting property is sildenafil's ability to protect the heart from excessive stimulation by adrenaline. Clinical trials will be needed to see which patients might benefit. It's the most speculative use for sildenafil, and it's far from clinical application. Still, it's an interesting area of new research. A European study of 25 men who had erectile dysfunction but no other circulatory disorders found that blood vessels in the brain responded to stress better after a 50-mg dose of sildenafil.

How to get Viagra

More interesting results were reported by scientists in Michigan, who produced ischemic strokes in rats by temporarily blocking blood vessels. During their recovery, the animals were divided into three groups. One received no treatment, another low-dose sildenafil, and the third high-dose sildenafil. The animals who got sildenafil recovered better, with the highest doses producing the best results. The scientists concluded that the medication actually stimulated the growth of new nerve cells in the brain tissue next to the stroke damage. The FDA maintains a list of tainted sexual enhancement products that includes recent products found to contain unlabeled and/or dangerous ingredients. Our guide to over-the-counter ED “medications” goes into more detail about these products and why they’re best avoided for your sexual health.