The clinically established treatment for erectile dysfunction — the generic form of Viagra®, now prescribed online, reviewed by licensed providers, and shipped discreetly from U.S. pharmacies to all 50 states.
Your price depends on the dose your provider prescribes
$35/mo Most people start here
A few private questions, then a licensed provider reviews your answers.
Sildenafil citrate is the generic form of Viagra® — the original PDE5 inhibitor approved for erectile dysfunction. As an FDA-approved generic, it contains the identical active ingredient to the brand at a far more accessible price.
It's intended for use as needed before sexual activity rather than on a daily schedule. Because it relies on natural arousal to work, sildenafil supports your body's own response rather than overriding it — one of the most prescribed and studied ED medications in the world, with a well-characterized profile.
It comes in three strengths — 25 mg, 50 mg, and 100 mg — so a provider can dial in what works for your body, and adjust over time based on how you respond.
Erectile dysfunction — difficulty getting or keeping an erection firm enough for sex — is one of the most common conditions men face, and it becomes more common with age. An erection depends on healthy blood flow, so ED can stem from vascular, nerve, hormonal, or psychological factors, and it's often linked to conditions like high blood pressure, diabetes, and heart disease, as well as stress, anxiety, and lifestyle factors.
ED affects millions of men and grows more common with age. It's a routine reason men talk to a provider, not a rare or embarrassing problem.
For most men, ED responds well to treatment. PDE5 inhibitors like sildenafil are a well-established first-line option, and a licensed provider can help you find what works.
The short answer: over-the-counter "enhancement" supplements aren't reviewed for ED and their contents vary, lifestyle changes help gradually, and a prescription PDE5 inhibitor like sildenafil is clinically proven to improve erections on demand — with a provider reviewing your health history first.
| OTC "enhancement" supplements | Lifestyle changes | Prescription sildenafil (Rx) | |
|---|---|---|---|
| What it does | Marketed for "performance," contents unregulated | Supports overall vascular health | Clinically shown to improve erections |
| Evidence for ED | Not FDA-reviewed for ED | Helpful, but gradual | Decades of clinical trials |
| When it works | Varies / unverified | Weeks to months | Within 30–60 minutes |
| Provider involved | No | No | Yes — reviews your health history first |
| Regulated & dispensed by a pharmacy | No | N/A | Yes — Rx only, U.S. pharmacies |
Many men try OTC supplements first, can't verify what's actually in them, and see little effect. A prescription tablet is the proven step up: an established medicine, a provider in the loop, and a dose matched to your body instead of a one-size-fits-all supplement.
It works by improving blood flow. Sildenafil blocks an enzyme called PDE5 so that, with natural arousal, blood vessels relax and more blood reaches the penis — making an erection easier to achieve and maintain.
Sildenafil inhibits the PDE5 enzyme, which normally breaks down the signal that allows an erection to form.
With PDE5 paused, blood vessels relax and circulation to the penis increases when you're aroused.
The result is a firmer erection that's easier to achieve and maintain — with natural arousal still required.
It's for men who want a proven, as-needed option for erectile dysfunction — especially those trying treatment for the first time.
If erections have become harder to achieve or maintain, sildenafil is a clinically established first step.
Taken only when you need it — no daily pill — ideal for spontaneity and trying treatment on your own terms.
Affordable, well-understood, and flexible across three dose strengths — the sensible place most men start.
A private online visit and unmarked shipping mean no waiting room and no pharmacy counter.
If you take nitrate medications for chest pain or heart conditions, sildenafil is not safe for you. If you'd prefer a longer window of effect, Tadalafil (up to 36 hours) may fit better. And any chest pain, fainting, or undiagnosed heart symptoms need evaluation before starting — mention them in your visit.
You complete a private online visit, a licensed provider reviews it, and — if appropriate — your prescription ships to your door. No insurance required, no in-person appointment, no waiting room.
A few private questions about your health and goals, on your own time.
A provider licensed in your state reviews your information and, if appropriate, prescribes the dose that fits you.
Shipped from a U.S. pharmacy in plain, unmarked packaging to all 50 states. Automatic refills available, and you can message your care team anytime.
Pricing is shown at checkout — no insurance needed, no hidden fees.
You take one tablet as needed, about an hour before sexual activity, and your provider sets your starting dose. Sildenafil is well-studied and generally well-tolerated, but it must never be combined with nitrates.
Taking sildenafil with nitrate medications (often prescribed for chest pain or heart conditions) can cause a dangerous, life-threatening drop in blood pressure. Tell your provider about every medication you take.
Most side effects are mild and short-lived. Possible effects include:
Seek immediate care for an erection lasting more than 4 hours (priapism) or sudden vision or hearing changes. Limit alcohol, and disclose all medications and conditions so a licensed provider can confirm sildenafil is appropriate for you.
A side-by-side look at the ED options available through ForbiddenRx. Your provider helps you choose what's right.
| Treatment | What it is | Onset | Duration | Form | Rx required |
|---|---|---|---|---|---|
| Sildenafil Popular | Generic Viagra®, a PDE5 inhibitor | 30–60 min | 4–6 hours | Tablet | Yes |
| Tadalafil | Generic Cialis®, longer-acting PDE5 | 30–60 min | Up to 36 hours | Tablet | Yes |
| 3-in-1 Hard Mint | Compounded blend, dissolvable | 15–30 min | Varies | Troche / mint | Yes |
| Branded Viagra | Original brand-name sildenafil | 30–60 min | 4–6 hours | Tablet | Yes |
Sildenafil is the active ingredient in Viagra®, available as an FDA-approved generic. It contains the identical active compound as the brand-name product at a lower cost.
Most men find sildenafil begins working within 30–60 minutes. Taking it about an hour before activity, and avoiding heavy meals beforehand, can help. Natural sexual stimulation is still required.
Yes. Sildenafil is a prescription medication. After your online visit, a licensed provider reviews your information. A prescription is not guaranteed and is subject to provider review of your health history.
Sildenafil comes in 25 mg, 50 mg, and 100 mg. Your provider recommends a starting dose based on your intake form, and your plan can be adjusted over time based on how you respond.
Never take sildenafil with nitrate medications — the combination can cause a dangerous drop in blood pressure. Limit alcohol, and disclose all medications and conditions to your provider.
Yes. Your consultation is confidential, and medication ships in discreet, unmarked packaging. Your information is handled in accordance with applicable privacy standards.
U.S. board-certified clinicians
Licensed, verified dispensing partners
Nationwide telehealth coverage
Complete a quick online visit and a licensed provider takes it from there — reviewing your information and, if appropriate, shipping your sildenafil discreetly to your door.
Medically reviewed by ForbiddenRx Medical Affairs — Independent, licensed medical providers · Last reviewed July 2026. This page was written and is periodically reviewed for medical accuracy in line with clinical guidance followed by the independent, licensed medical providers in the ForbiddenRx network. It is provided for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. Always talk with a licensed provider about your individual health.
This page is educational and is not medical advice.