Quad by MEDVi is a clinician-prescribed, under-the-tongue option that the maker says combines apomorphine, L-citrulline, tadalafil, and sildenafil for desire, blood flow, strength, and a longer response window. For lifters and endurance athletes, the practical point is simple: it is not a pre-workout or a training supplement; it is a prescription pathway that may fit your sex-life goals while your clinician decides whether it fits your health history and current medicines.
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Is MEDVi Quad legitimate, and what are you actually getting?
MEDVi presents Quad as a four-ingredient, rapid-absorb liquid placed under the tongue. Its page says a US-licensed doctor reviews the online intake and may issue a prescription after approval. MEDVi’s terms say the platform supports consultations, assessments, and prescription coordination, while the medical provider makes the prescribing decision.
The product page lists apomorphine, L-citrulline, tadalafil, and sildenafil. It does not publish the amount of any ingredient, the number of doses, or the number of days a monthly supply lasts. That matters if you are comparing value or trying to plan around travel, race week, or a demanding training block: ask for the prescribed strength, dosing instructions, and supply length before checkout.
| What Quad lists | What it means for your decision |
|---|---|
| Apomorphine | The maker says it is included for desire and arousal. |
| L-citrulline | An amino acid involved in the body’s nitric-oxide pathway. |
| Tadalafil | The maker markets it as the longer-window ingredient. |
| Sildenafil | The maker markets it for its blood-flow role. |
| Ingredient amounts and doses | Not published. |
MEDVi’s page also displays customer testimonials and a 4.5-out-of-5 Trustpilot statement. Testimonials can show what individual customers say about their experience, but they are not a substitute for your own eligibility review and prescription discussion.
Does Quad really work for ED?
Quad is designed around ingredients that the maker says work together. The research behind the pieces is not the same as a study of the finished four-ingredient formula, so it helps to separate the two.
A 2014 PubMed review describes PDE5 inhibitors as a first-line option in its discussion of erectile dysfunction in men with diabetes. That review also explains that erectile dysfunction can involve nerve, blood-vessel, smooth-muscle, and hormonal pathways. A separate 2015 PubMed review discusses PDE5-inhibitor response and testosterone evaluation in men who do not respond as expected.
For L-citrulline, a small study summarized by Cleveland Clinic gave 24 people with mild erectile dysfunction 1.5 grams daily for one month; 12 participants moved from mild erectile dysfunction to typical erectile function. Cleveland Clinic notes that more research is needed. Quad’s label does not publish its L-citrulline amount, so that study dose cannot be matched to Quad.
If your question is whether a four-part prescription is “better than Viagra,” there is no head-to-head Quad-versus-Viagra study in the material here. Quad includes sildenafil, which is the active ingredient associated with Viagra, plus the other listed ingredients. The useful comparison is not a slogan. It is whether your clinician considers the formula, dose, timing, and your medication list appropriate for you.
What does the fitness angle add?
Training can improve how you feel in your body, but hard sessions do not turn an ED prescription into a performance supplement. Keep the goals separate. Your lifting plan is for strength and muscle. Your endurance plan is for aerobic performance. Quad is marketed for sexual performance.
L-citrulline is the one listed ingredient that often catches a gym-goer’s eye. A 2021 systematic review and meta-analysis included 118 studies of foods containing nitric-oxide-related compounds. It included three L-citrulline studies and found no effect on endurance exercise performance from L-citrulline-rich foods. A six-week randomized controlled trial in 44 adults ages 60 to 73 found improved walking speed with citrulline plus an activity program, while strength and endurance changes were not significantly different from placebo.
That does not make the ingredient irrelevant to Quad’s stated purpose. It does mean you should not count its prescription as your pump formula, race-day fuel, or substitute for the basics that drive training progress. Keep your food, hydration, sleep, and program consistent. If sleep is part of the bigger picture, see the Yu Sleep guide.
For an active man, the next small step is to bring your full training-supplement list and every prescription or nonprescription medicine to the prescribing conversation. That makes it easier to avoid guessing about what belongs in the same routine.
What side effects and safety questions should you raise?
L-citrulline may affect blood flow. Cleveland Clinic lists bloating, cramping, diarrhea, and sweating as possible side effects of citrulline supplements, and says supplements can interact with medicines. A 2018 review of L-citrulline explains that it can raise L-arginine levels and nitric-oxide synthesis, with research examining blood-pressure effects in adults with pre-hypertension or hypertension.
Ask a clinician before pursuing Quad if you use any medicines, have a relevant health condition, or are unsure how its listed ingredients fit your training supplements. Do not use a sales page to decide how to start, stop, or change a prescription. MEDVi says its clinician reviews your history and decides whether a prescription is appropriate.
ED itself can have more than one cause. The 2014 PubMed review describes vascular, nerve, hormonal, and structural pathways in men with diabetes. Stress can also matter; an iCliniq physician Q&A describes questions about stress, desire, morning erections, and masturbation as part of distinguishing possible patterns in one 29-year-old’s situation. A clinician can help you work through your own pattern rather than treating a hard training week, poor sleep, relationship pressure, or a health issue as the same problem.
Price, delivery, cancellation, and refund basics
Prices shown October 12, 2026: MEDVi advertises Quad starting at $114 per month, compared with a displayed $179 retail figure. The page says doctor consultation and free rush shipping are included, and it promotes bundles. Check the checkout for today’s price, supply length, and bundle terms. When you are ready to see the current option or begin the intake, use the Product Page.
| Checkout question | What MEDVi states |
|---|---|
| Starting price | $114 per month |
| Displayed retail comparison | $179 per month |
| Shipping | Free rush shipping is advertised |
| Consultation | Included, according to the product page |
| Supply and dose count | Not published |
MEDVi’s cancellation policy says you may cancel by emailing hello@medvi.org or using the patient-portal chat. It asks that the request arrive at least 72 hours before the next billing date. It says a full refund is available when a healthcare provider disqualifies you for a medical reason. Once prescription medication has been ordered, its policy says it cannot be returned for refund or reuse; damaged or incorrect medication may be replaced through the pharmacy after contact with customer service.
Can lifestyle work alongside an ED plan?
Yes. Make the lifestyle side practical, not dramatic. Protect sleep, keep training sustainable, eat enough to support the work you do, and make room for an honest conversation with your partner. A partner can help by lowering the pressure, listening, and encouraging a clinician visit when the issue keeps showing up. The goal is a shared plan, not a pass-fail test.
Natural routines can support general health, but they are not automatically a replacement for a prescribed option. Harvard Health notes that many herbal supplements marketed for erectile dysfunction are not proven effective and may have serious side effects. If you want a separate look at a different active-men’s sublingual option, the Vital Man 4th Gear guide explains its disclosed format and training context.
Before you order Quad
- Confirm the prescribed dose, doses per supply, and expected refill date.
- Share every medicine and supplement you use, including workout products.
- Confirm the current monthly price and whether a bundle changes your commitment.
- Save the 72-hour cancellation window in your calendar if you enroll.
- Use the clinician review to ask which option fits your own health and training routine.
Quad gives you a defined telehealth route if you want a clinician to assess a four-ingredient prescription option. Start with the intake, bring a complete medication and supplement list, and let the prescription decision be based on your own situation.
By the Gym Floor Guide Editorial Team