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Generic Viagra, known as sildenafil, is an alternative to the branded drug Viagra that can be used to treat erectile dysfunction (ED) and is available online at a fraction of the price.
Best overall: Hims Sildenafil|Skip to review
Most transparent pricing: Roman Sildenafil|Skip to review
Most affordable generic Viagra: Lemonaid Sildenafil|Skip to review
Best telehealth service: Optum Perks Sildenafil|Skip to review
If you’re experiencing the symptoms of erectile dysfunction (ED), you may have considered using Viagra or a similar ED medication as a possible treatment.
If you’ve searched for places to buy Viagra online, you’ve surely noticed its price tag too. Since Viagra is a brand-name medication, the price of Viagra is very high and may not currently fit within your budget.
But a generic version of this popular medication, sildenafil, is now widely available from several drug manufacturers at a fraction of the cost.
| Price for sildenafil* | Dosage available for sildenafil* | ED medications available | |
|---|---|---|---|
| Roman | $4 to $10 per dose | 25 to 100 mg | • branded Viagra • sildenafil • branded Cialis • generic Cialis • generic daily Cialis |
| Hims | starting at $4 per dose | 25 to 100 mg | • branded Viagra • sildenafil • branded Cialis • generic Cialis |
| Lemonaid | $2 per dose | 20 mg | • sildenafil • tadalafil |
| Optum Perks | varies based on dosage and pharmacy | varies by pharmacy | varies by pharmacy |
*Prices are accurate as of May 2024
Sildenafil citrate (sildenafil), often referred to as “generic Viagra,” is the same active ingredient used in Viagra. Viagra also contains small amounts of inactive ingredients, which give the pill its form and make it easier for your body to metabolize it.
One of the primary causes of ED is a buildup of the phosphodiesterase type 5 (PDE5) enzyme that restricts blood flow to your penis and prevents or lessens the firmness of an erection. Sildenafil works as a PDE5 inhibitor, which blocks the effect of PDE5 and allows more unrestricted blood flow, making an erection more likely.
Sildenafil doesn’t cure ED — it treats ED symptoms. Likewise, sildenafil doesn’t cure pulmonary hypertension (PH), which is elevated blood pressure in the arteries of your lungs and in the right side of your heart. It just helps regulate blood pressure in the arteries in your lungs.
Sildenafil is in a class of medications called PDE5 inhibitors. These drugs restrict the action of phosphodiesterase enzymes, which break down cyclic guanosine monophosphate. This is a type of molecule that relaxes smooth muscle tissue in your body, such as the muscles in the blood vessels that allow your penis to become erect.
Taking sildenafil improves circulation by helping the arteries relax enough to fill more easily with blood.
Sildenafil is quickly absorbed into your bloodstream, reaching a maximum concentration in about 1 hour for most users. Generic Viagra, like other PDE5 inhibitors, can cause a drop in blood pressure. If you take medications for blood pressure regulation or tend to have low blood pressure, ask your doctor whether it’s safe for you to use sildenafil.
Sildenafil doesn’t trigger an erection on its own, nor does it increase sexual desire. Sexual stimulation is still required. However, for most people who are generally healthy, sildenafil can make an erection easier to get.
A
Instead of the “little blue pill,” as Viagra is known, sildenafil is often sold as a little white pill by Viagra’s competitors. The pill’s appearance does not change its effectiveness or how it works in your body.
While generic sildenafil and Viagra are equally safe and effective, the medications have one key difference: price. Viagra costs $90 to $139 per tablet. Generic sildenafil can range from $2 to $10 per pill, depending on the manufacturer and dose.
Avoiding fake Viagra
Viagra and other ED medications are some of the most counterfeited drugs. It’s important to talk with a doctor to seek treatment and get medications through a pharmacy.
Sildenafil is available at most retail pharmacy locations and several reputable online retailers, so there’s no need to buy sildenafil from companies that are not regulated by the Food and Drug Administration (FDA).
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Sildenafil is best known as a treatment for ED, the inability to get or keep an erection. Sildenafil is meant to be taken before having sex, with the understanding that its effects last only a few hours.
Sildenafil is also approved for treating PH. Revatio is the brand name of sildenafil prescribed for PH. It’s worth noting that while Revatio and Viagra have the same active ingredient, Revatio is FDA-indicated for treating PH specifically, and you shouldn’t take Revatio instead of Viagra or alongside Viagra to treat ED.
In the United States, sildenafil for ED or PH requires a prescription. The United Kingdom allows for over-the-counter (OTC) sales of the drug, in part to discourage the market for fake sildenafil. Sildenafil is one of the most counterfeited drugs in the world.
Sildenafil may cause side effects, most of which are minor and temporary. Some of the most common are:
- headaches
- flushing (a feeling of warmth under your skin)
- heartburn
- diarrhea
- insomnia
- tingling in your limbs
- muscle aches
- sensitivity to light
Serious side effects of sildenafil
If you experience any of these serious side effects, you should immediately call your doctor or 911:
- priapism (an erection that is painful or lasts longer than 4 hours)
- blurry vision or a sudden and severe loss of vision
- diminished hearing
- ringing in your ears
- dizziness or lightheadedness
- fainting
- shortness of breath
- chest pain
- itching or burning during urination
- rash
Like any other medication, sildenafil can have potentially serious interactions with other drugs, alcohol, and even some foods.
Blood pressure and heart medications
One of the most serious interactions can come from combining PDE5 inhibitors with nitrates or compounds containing nitrates. Several studies, including a 2018 study, show that using PDE5 inhibitors with nitrates is a contraindication that can cause a life threatening drop in blood pressure.
To reduce the chances of a dangerous interaction, you should tell your doctor about any medications you’re taking before starting any new medication.
If you take other medications for high blood pressure, you may be at risk of experiencing a dangerous drop in blood pressure. Examples of these medications include:
- diuretics
- angiotensin-converting enzyme (ACE) inhibitors
- calcium channel blockers
A drop in blood pressure can result in:
- dizziness
- headache
- fainting or falling
Severe drops in blood pressure can also result in less oxygen moving through your organs.
Other ED medications
Avoid taking sildenafil with any other ED medications. The combination can lower your blood pressure, causing fainting, dizziness, and in some rare cases, heart attack.
Alcohol
Combining alcohol and sildenafil can lower your blood pressure too much. Avoid alcohol if you’re taking sildenafil.
Grapefruit
The only foods that interact with generic Viagra are grapefruit and grapefruit juice. These products can raise the levels of sildenafil in your body but can also delay the time it takes for the drug to take effect.
Cytochrome P450
Similar to grapefruit, medications known as cytochrome P450 (CP450) inhibitors and substrates can delay the effects of sildenafil and increase your chances of experiencing side effects. CP450 inducers, such as modafinil, reduce the effects of sildenafil if taken at the same time.
CP450 medications include:
- cimetidine
- clopidogrel
- chloramphenicol
- fluvoxamine
- omeprazole
- modafinil
While you may be familiar with Viagra and its effectiveness, you might be understandably cautious about a generic version of Viagra.
If you have questions about how well generic Viagra works or where to buy it from a reputable source, it’s a good idea to meet with a doctor or another healthcare professional.
If you’re experiencing symptoms of ED and considering a generic version of Viagra, your doctor can prescribe a generic alternative to ensure that it’s safe and FDA-approved.
It’s important to avoid any generic alternative that is not prescribed by a doctor and fulfilled by a reputable pharmacy. Prescriptions not filled through legitimate channels may not be FDA-approved, may have inaccurate labeling on the packaging, and may have ineffective or potentially harmful ingredients.
Sildenafil (generic Viagra) is the non-branded version of the popular ED drug. It’s virtually identical to the brand-name drug, except that the pills may be a different color (instead of blue, like Viagra) and they cost a lot less.
Generic Viagra usually costs anywhere from $2 to $10 per tablet, depending on the dose, manufacturer, and pharmacy.
This is the general price you can find through subscription services such as Roman, Hims, and Lemonaid.
You may encounter a wider price range when filling a prescription at your local pharmacy. Your price can vary even more depending on whether you use a discount card from the pharmacy or from a third party and whether your insurance provider covers generic Viagra.
Before purchasing your medication, it’s always worthwhile to inquire about the price from several pharmacies or companies so you can find the best price for your budget.
No. In most countries, including the United States, Viagra is not available without a prescription.
However, in 2017, Viagra became available over the counter in the United Kingdom to fight the counterfeit market and improve access.
In the United States and most other countries, generic Viagra is only available with a prescription.
However, many new telehealth services make it easier to get a prescription without making an in-person appointment with a doctor.
There are also a few OTC alternatives to Viagra that may be worth exploring.
If a doctor prescribes 100 mg of sildenafil or Viagra, it’s safe to use — as long as you’ve told your doctor about your medical history and any other medications you’re currently taking.
A 100-mg dose is on the high end of the available doses and may be necessary only for people with more severe ED symptoms.
In most cases, if you’re new to taking ED medications, your doctor will likely start you on a lower dose and may increase it if you don’t get your desired results.
A frequent misunderstanding about ED medications is that a higher dose will produce better results. Thetruth is that a higher dose won’t make your erections any harder or help you maintain an erection any longer after the point of org*sm if a lower dose can effectively address your ED symptoms.
Additionally, a person who takes ED medication when they’re not experiencing ED symptoms will likely not experience any changes, even if they take a high dose.
In fact, if you take the medication without a prescription or do not take it as prescribed, you could experience very serious side effects if it negatively interacts with other medications you may be taking.
Generic Viagra (sildenafil citrate) works the same way as Viagra but comes at a lower cost.
While Pfizer still manufactures the “little blue pill,” other companies, globally and in the United States, make sildenafil. It may look different, but it’s still an effective treatment for ED.
