Erectile dysfunction (ED) probably isn't your go-to conversation starter. However, it's incredibly common, and there are more treatment options available today than ever before. Among the most familiar are prescription medications designed to help make getting and maintaining an erection easier.
Still, knowing that these medications exist and understanding how they work are two different things. What's the difference between Viagra and Cialis? How quickly do they work? Does taking one mean you'll suddenly have an erection at an inconvenient moment? Thankfully, no.
Here's what to know about the most common ED meds and how they differ.
How Do ED Medications Actually Work?
Most commonly prescribed ED medications belong to a group of drugs called phosphodiesterase type 5 (PDE5) inhibitors. When you're sexually stimulated, your body releases chemical signals that cause blood vessels in the penis to relax, increasing blood flow and helping produce an erection.
An enzyme called PDE5 eventually breaks down one of the chemicals involved in this process. PDE5 inhibitors temporarily slow that enzyme down, helping blood vessels remain relaxed and supporting the blood flow needed for an erection.
Think of these medications less like flipping an “on” switch and more like removing a roadblock. Sexual stimulation is still generally necessary, and ED medications don't automatically increase sexual desire.
Sildenafil, Tadalafil, Vardenafil, and Avanafil
You've probably heard of Viagra and Cialis, but they're only part of the lineup. Sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and avanafil (Stendra) are all PDE5 inhibitors, but their timing and duration differ.
Sildenafil and vardenafil are generally taken as needed before sexual activity. Avanafil is also an as-needed medication and may start working relatively quickly. Tadalafil stands out because its effects can last considerably longer, and it's also available in a lower-dose daily regimen for some people.
When a medication is said to "last" for hours, that doesn't mean you'll have an erection for hours. It means there's a window during which the drug can help you get an erection when you're sexually stimulated.
Why One ED Medication May Work Better Than Another
The best option depends on several factors, such as how often you have sex, how much spontaneity you want, other medications you take, your health history, side effects, and cost.
Individual responses vary, too. A medication that works well for one person may be less effective or cause unwanted side effects for another. That's why choosing an ED medication and adjusting the dose when necessary is best done with a healthcare professional who can consider the bigger picture.
Side Effects: What Should You Expect?
Like practically every medication, ED medications can come with side effects. Fortunately, many of the commonly reported ones are relatively mild and temporary. Headaches, facial flushing, nasal congestion, indigestion, and dizziness can occur with PDE5 inhibitors. The exact experience can vary, depending on the medication, dose, and individual.
Some drugs have their own quirks. Tadalafil can sometimes cause muscle or back aches. Sildenafil and certain other PDE5 inhibitors may occasionally cause temporary visual changes, such as a bluish tint to vision or increased sensitivity to light.
More serious reactions are uncommon, but they're important to recognize. An erection that lasts more than four hours requires immediate medical attention. Sudden vision or hearing loss should also be treated as an emergency.
The Safety Conversation You Shouldn't Skip
ED medication can be convenient, but “easy to take” doesn't mean “safe for everyone.” Before using one, it's important to discuss your medications and health history with a qualified healthcare professional.
One particularly important interaction involves nitrates, which are medications commonly prescribed for chest pain. Combining nitrates with PDE5 inhibitors can cause blood pressure to fall to dangerously low levels. Other drugs, including certain blood pressure medications and alpha-blockers, may also require special consideration.
Certain cardiovascular conditions and other health issues can influence whether ED medication is appropriate. That's why your healthcare provider needs the full picture, including prescription drugs, over-the-counter medications, and supplements you're taking.
Stick with medication prescribed specifically for you and use reputable, licensed pharmacies rather than questionable websites selling suspiciously cheap products.
Know Your Options, and Ask the Right Questions
ED medications share the same general goal, but they're not interchangeable. Differences in how quickly they start working, how long their effects last, how they're taken, and their potential side effects can make one option a better fit than another.
Understanding those basics can make conversations about ED considerably less awkward. Rather than wondering which medication is supposedly “best,” you can ask more useful questions: Which option fits my lifestyle? Could it interact with anything I'm taking? What side effects should I watch for?
Those are questions worth discussing with a healthcare professional. With the right information and medical guidance, choosing an ED medication can become a straightforward healthcare decision rather than a guessing game.
