Viagra FAQS: Does Viagra Expire, Efficacy & More

Got a question about Viagra®? We’ve got answers. From the history of the drug to information about Viagra’s onset of action, potential side effects and more, we’ve answered 22 of the most common questions about Viagra (as well as its generic drug counterpart, sildenafil) below.

Does Sildenafil Expire?

Does Viagra expire? Yes, and so does the generic version, sildenafil. 

A Viagra tablet or pill may continue to provide erectile benefits after its expiration date, but because the active ingredient and other chemicals in expired medications see reduced activity, they may not work as well. Worse, expired meds can grow pathogens like bacteria and mold that can cause additional adverse effects.

If your Viagra has expired, do not use it. The FDA requires an expiration date for all prescription and over-the-counter medications for a reason. Take it from us: Follow them. 

What’s the Shelf Life of Viagra?

Sildenafil shelf life may range slightly from one producer to the next, but generally speaking, Viagra expires about two years after it’s manufactured.

That’s comparable to other ED medications, like (brand-name ), Stendra® (active ingredient avanafil), and Levitra® (active ingredient vardenafil). 

When you need precise answers, check your medication’s packaging.

Note the expiration date, and aim to use the medication as prescribed before it expires. If the expiration date has already passed, it’s time for a new pack.

Does Expired Viagra Still Work?

Because its ingredients only stay chemically potent for a certain amount of time , Viagra can become less effective over time.

Viagra — like most other erectile dysfunction treatments — works by increasing blood flow into the soft tissue of your penis. It’s very effective at this, making it a great treatment option if you have erectile dysfunction caused by a health issue that affects blood flow throughout your body. You can read the details in our guide to how Viagra works. 

That being said, not everyone who uses Viagra experiences improvements in erectile function. 

In clinical trials, the success rate of Viagra (percentage of men who reported improved erections) ranged from 66 to more than 80 percent.

Some medical conditions, such as diabetes, may reduce the effectiveness of Viagra and other ED medications.

Viagra might also be less effective if you’ve undergone a surgical procedure that affects your sexual function, like a radical prostatectomy.

Also, Viagra doesn’t directly affect the psychological side of sexual performance, such as your interest in sex, arousal level or sexual confidence. If your ED is caused by a psychological issue, Viagra or other ED medications may not relieve your symptoms. 

We broke down what you can do if Viagra doesn’t work, including how you can overcome common causes of ED, in case you need to know more.

What Happens to Viagra When it Expires?

For informational purposes, here’s what’ll start to happen to Viagra once it expires (which isn’t all that different from any other expired medication):

• The active ingredient becomes less active, increasing the medication’s onset of action — meaning, the time it takes to start working, and decreasing the potency - meaning the overall effectiveness   

• The risk of growing mold and bacteria increases, increasing your risk of getting sick. 

As the medication’s ingredients continue breaking down, the common side effects of Viagra can increase in frequency.

Taking expired Viagra can cause:

• Itchy, pin-and-needle sensations

• Nausea and stomach pain

• Indigestion or heartburn

• Back pain

• Headaches

• Dizziness 

• Vision issues, including sensitivity to light 

Is Expired Viagra Safe?

Expired sildenafil isn’t necessarily unsafe the day after its expiration date, but any respectable healthcare professional will advise against taking it.

To be clear: Viagra, sildenafil citrate and other phosphodiesterase type 5 or PDE5 inhibitors are FDA-approved for the treatment of ED. 

They can be a safe, effective erectile dysfunction treatment for men of all ages — especially when compared with supplements and over-the-counter ED treatments that are less rigorously controlled and tested than prescription ED meds.

Still, it’s important to get medical advice before taking any PDE5 inhibitor. Whether you’re taking Cialis (tadalafil), Levitra (vardenafil) or Stendra (avanafil), you can experience similar side effect risks.

While highly uncommon, the serious side effects of Viagra include allergic reactions, priapism (hint: prolonged and/or painful erection), sudden hearing loss and optic nerve damage.

If you’re simultaneously taking alpha-blockers, recreational drugs with nitrites (commonly called “poppers”), nitrates like nitric oxide or other medications for high blood pressure), drug interactions may lower your blood pressure.

As we’ve mentioned, certain side effects can become more frequent and more serious when these ED medications expire.

What to Do with Expired Viagra

When it comes down to it, our advice is simple: Do not take expired Viagra. If you’ve got some in your medicine cabinet or toiletry bag, dispose of it responsibly.

That’s not quite as simple as tossing it in the trash, but it’s not complicated either. And you’ve got a few options:

• Take advantage of city, state, or national take-back programs to let individuals throw away or recycle your expired Viagra the right way.

• Put your expired Viagra tablets in a sealed container like a plastic bag with some dirt, coffee grounds or cat litter before throwing it away. That way, a pet, child or other person is less likely to get into them.

Whatever you do, don’t flush any little blue pills down the toilet. That can be dangerous for the environment.  

Can Any Factors Affect How Long Viagra Lasts?

There’s no magical secret for extending the shelf life of Viagra pills, and while the Food and Drug Administration might remind you to keep your medication out of direct sunlight in normal temperature ranges, doing so won’t postpone Viagra’s expiration date.

However, several different factors can affect how long Viagra remains active in your body, as well as its effectiveness as an ED treatment. We’re talking:

• Your Viagra dosage. Like other medications, a normal dose of Viagra slowly becomes less effective as it leaves your body. A larger dose may remain active for slightly longer than a smaller dose.

• Your recent eating habits. Some types of food, particularly fatty food, may slow down your body’s absorption of Viagra. Eating a high-fat meal before using Viagra may affect how long it takes to work and increase the amount of time that Viagra is active.

• Any other medication you’re taking. Certain antibiotics, antiretrovirals and antifungal medications may increase the effects of Viagra and affect the amount of time required for your body to process the medication.

• Your psychological well-being. Viagra may be less effective, or last for a shorter period of time, if you have sexual performance anxiety, depression, feelings of guilt about sex or other mental health conditions.

• Your physical health. Some physical conditions, such as heart disease and diabetes, may reduce the effectiveness of Viagra or cause it to provide relief from ED for a shorter period of time. Procedures that can affect sexual function may have similar impacts. 

• Your age. In general, older men are more likely to experience increased concentrations of certain medications, as well as a reduced level of effectiveness. This may affect Viagra’s effects or duration of action.

How Do I Take Viagra for the Best Results?

For best results, you should take Viagra on a relatively empty stomach around one hour before you expect to have sex. A normal dose of Viagra should remain effective for approximately four hours. 

Avoid drinking large amounts of alcohol while using Viagra or generic sildenafil. If you use other medications, check with your healthcare provider to make sure they do not interact with Viagra, reduce its effectiveness or have any other safety risks. 

Viagra and generic sildenafil come in several doses, from 25mg to 100mg. You may need to try several different doses of sildenafil before finding one that’s most effective for you.

And in case it isn’t obvious, please follow your healthcare provider’s instructions while using this medication.

Learn More About Treating Erectile Dysfunction

If you’re one of the 30 million men affected by erectile dysfunction, ED medications such as Viagra and Cialis can help you to improve your erections and restore your sexual function. It just shouldn’t be expired.

Facts are facts — here’s what you need to know about expired ED meds:

• A pill that expired yesterday probably won’t cause major damage. It may be less effective, though, and take longer to work.

• Expired medications can cause unpleasant side effects that get worse the longer the medication’s been expired.

• If you don’t want to risk nausea, itchy sensations, bacterial infections and the ingestion of mold, responsibly discard your medications once their expiration date passes.

We offer several ED medications, following an online consultation with a licensed provider who will determine if a prescription is appropriate. 

You can also learn more about the causes of ED and the most effective methods of treatment in our full guide to erectile dysfunction.