Erectile dysfunction affects roughly 1 in 3 men over 40, and the treatment landscape has expanded well beyond the traditional "blue pill." MEDVi QUAD — the MEDVi telehealth ED formula you buy online, sometimes written as “medv quad” or “mediv ED” — is a clinician-prescribed compounded medication that folds four complementary ingredients — PT-141, Sildenafil, L-Citrulline, and Tadalafil — into a single sublingual (under-the-tongue) liquid. The thing I wanted to figure out writing this is whether “four ingredients” is a genuine clinical upgrade or just a way to justify a higher price, because at $114/month for 5 doses ($179 for 10) it's meaningfully above a generic. So this review walks through what each ingredient actually contributes, how it stacks up to Viagra and Cialis, and — importantly — when a plain generic is still the smarter first move.
If you're already comparing ED telehealth providers, check out our full Best ED Providers comparison list to see how MEDVi QUAD ranks alongside other top options.
ExploreTreatments Editorial Rating
MEDVi QUAD, 4.6 / 5
Based on ingredients, clinical oversight, pricing, and user experience. Read our full scoring below.
10–15 min
Onset time
36 hrs
Response window
$114/mo
Starting price
4-in-1
Active compounds
Quick-Look Summary
| Product Name | MEDVi QUAD |
|---|---|
| Product Type | Prescription-only compounded medication |
| Delivery Method | Sublingual liquid (under the tongue) |
| Prescription Required | Yes, online intake reviewed by a licensed U.S. clinician |
| Active Ingredients | PT-141, Sildenafil, L-Citrulline, Tadalafil |
| Onset Time | As little as 10–15 minutes (individual results vary) |
| Response Window | Up to 36 hours (no automatic erection) |
| Food Interaction | Less affected by meals vs. standard oral tablets |
| Starting Price | $114/mo (5 doses) · $179/mo (10 doses) |
| What's Included | Consultation, prescription, medication, discreet shipping, ongoing support |
| No-Approval Policy | No charge if clinician does not approve the prescription |
What Is MEDVi QUAD?
MEDVi QUAD is a telehealth-based, prescription-only compounded medication designed to support erectile function in adult men. It's not a supplement and isn't sold over the counter, you need to complete an online medical questionnaire, which a licensed U.S. clinician reviews before any prescription is approved.
What sets it apart from conventional ED pills is its four-ingredient formula, delivered as a sublingual liquid. Rather than swallowing a tablet that must travel through the digestive system, MEDVi QUAD is absorbed directly through the tissues under the tongue, which may lead to a faster, more predictable onset.
Notice who it's built for, because it tells you a lot: men who've already found single-ingredient tablets underwhelming — inconsistent timing, blunted by a heavy meal, or just not covering the whole picture of sexual response. That framing is honest, and it's also the tell that if the plain pill works fine for you, MEDVi isn't solving a problem you have. It earns its keep specifically when the simple version fell short.
How It Works: The Sublingual Advantage
Standard ED tablets are swallowed and absorbed through the gut, a process that takes time and can be slowed by food, particularly fatty meals. Sublingual delivery bypasses digestion entirely. The active compounds pass directly into the bloodstream through the mucous membranes under the tongue.
In practical terms, this means many users experience a faster onset (potentially 10–15 minutes), less variability depending on whether they've eaten, and a more consistent effect window. It's worth noting that MEDVi QUAD creates a response window, an extended period during which an erection can occur naturally with sexual stimulation, rather than producing an automatic or constant erection.
The Four Active Ingredients: What Each One Does
MEDVi QUAD earns its name from the four active ingredients it contains, each targeting a different part of the sexual response:
PT-141, Igniting Desire
Unlike the PDE5 inhibitors, PT-141 (bremelanotide) doesn't primarily act on blood vessels. Instead, it works through melanocortin receptors in the central nervous system to support the neurological and psychological side of arousal, addressing desire and mental readiness rather than just physical blood flow.
L-Citrulline, Rapid Flow
L-Citrulline is an amino acid the body converts to L-arginine to boost nitric oxide production, relaxing blood vessels and improving circulation. In the QUAD formula, it's included to support stronger, faster blood flow that reinforces the erectile response.
Sildenafil, Erection Firmness
The most widely recognized ED ingredient, sildenafil enhances blood flow to penile tissue to support erection quality and firmness. Decades of clinical use give it one of the strongest track records in the category. According to the FDA, sildenafil is approved for the treatment of erectile dysfunction in adult men.
Tadalafil, Extended Duration
Tadalafil is best known for its long active window, up to 36 hours, compared to other PDE5 inhibitors. Its inclusion in QUAD means the body can remain responsive for an extended period, reducing the pressure of strict timing.
MEDVi QUAD Dosage Chart: Doses Per Bottle, Strength and How to Take It
This is the question we get asked most about QUAD, and the honest answer has two halves. The part MEDVi publishes is the dose count, which is what the plan you pick actually buys you. The part MEDVi does not publish is a fixed milligram strength, because QUAD is compounded per patient rather than sold in off-the-shelf strengths the way a 50 mg sildenafil tablet is.
How many doses are in a bottle of QUAD?
MEDVi ships QUAD as a sublingual liquid in two plan sizes. The smaller one is what people are searching for when they look up the “MEDVi QUAD 5 pack”:
| Plan | Doses included | Monthly price | Cost per dose | Best for |
|---|---|---|---|---|
| 5-dose plan (“5 pack”) | 5 doses per month | $114/mo | ≈ $22.80 | Roughly once-a-week use, or a first month to test tolerance |
| 10-dose plan | 10 doses per month | $179/mo | ≈ $17.90 | Two or three times a week; ~21% cheaper per dose |
So “how many doses in a bottle of QUAD” resolves to five or ten depending on which plan the clinician approves you for. Neither plan carries a separate consultation or shipping charge, and if you finish a month's doses early there is no partial-refill mechanism — you wait for the next cycle or move up a plan.
Why there is no published milligram chart
If you have been hunting for a table of exact PT-141, sildenafil, L-Citrulline and tadalafil concentrations, you will not find one, and that is a function of how compounding works rather than an omission. A compounding pharmacy prepares the formula for an individual patient at the concentrations the reviewing clinician specifies, so the strength on your bottle reflects your intake answers — cardiovascular history, current medications, prior response to PDE5 inhibitors — rather than a catalogue SKU. Two men on the same $114 plan can be on different concentrations.
The practical consequence: your dosing instructions arrive with the medication, printed for your specific prescription, and they are the only chart that applies to you. Treat any milligram figures you find on a forum as somebody else's prescription.
How to take MEDVi QUAD
- Measure the dose as prescribed and place the liquid under your tongue — not on top of it, and not swallowed straight down.
- Hold it there for 60–90 seconds before swallowing what remains. This is the whole point of the sublingual route: the compounds cross the mucous membrane directly instead of going through the gut, which is why onset can land near 10–15 minutes.
- Take it 10–15 minutes before sexual activity. The tadalafil component means the response window can extend to roughly 36 hours, so precise timing matters far less than it does with a 4–6 hour sildenafil tablet.
- One dose in a 24-hour period. Do not repeat a dose because the first felt weak, and do not stack QUAD with Viagra, Cialis, or any other PDE5 inhibitor — that is an additive blood-pressure risk, not a stronger result.
- Heavy or fatty meals matter less than with swallowed tablets, but a large amount of alcohol still works against you and compounds the blood-pressure drop.
- Dose changes go through your clinician. If the prescribed amount is consistently underwhelming or the side effects are rough, that is a titration conversation, not a self-adjustment.
Because these are prescription compounds rather than a supplement, the FDA notes that compounded drug products are not FDA-approved and therefore have not undergone premarket review for safety, effectiveness, or manufacturing quality as finished formulas — even when, as here, the individual active ingredients have. That is the trade-off you accept in exchange for a personalized multi-ingredient dose.
MEDVi QUAD vs. Standard Single-Ingredient ED Pills
Traditional ED medications, sildenafil, tadalafil, or vardenafil prescribed individually, are effective for many men. But they're one-dimensional by design: they target blood flow, and that's largely it. MEDVi QUAD takes a different angle by addressing multiple aspects of sexual response simultaneously.
Single-ingredient generics are less expensive and well-understood. MEDVi QUAD costs more but bundles the consultation, prescription management, compounding, and discreet delivery into a single monthly plan. For men who've already tried generic options and found them inconsistent or insufficient, the four-mechanism approach may be worth considering.
Potential Benefits
Based on the formulation and delivery method, MEDVi QUAD may offer several practical advantages for some users:
- Faster onset than traditional oral tablets, due to sublingual absorption
- Reduced dependence on meal timing for effectiveness
- A longer response window that takes the pressure off strict scheduling
- Support for both neurological arousal and desire (PT-141) and physical blood flow (PDE5 inhibitors plus L-Citrulline)
- One prescription that consolidates multiple treatment mechanisms
As with any prescription treatment, individual results vary depending on health history, dosage, and how well the body responds.
Safety, Side Effects & Medical Oversight
MEDVi QUAD is only dispensed after a licensed clinician reviews your intake. Because it's a compounded medication, prepared specifically to combine these four active ingredients, it requires a full and honest medical history from the user.
It is not appropriate for everyone. Men with certain cardiovascular conditions, those taking nitrates, or users on contraindicated medications should not use MEDVi QUAD. The online intake process is the gate for screening these risks.
Potential side effects, which vary by individual and dose, may include headaches, facial flushing, mild nausea, nasal congestion, and temporary dizziness. Many side effects, when they occur, are dose-related and can be managed with guidance from a healthcare provider.
Pros & Cons
✔ Pros
- Four-mechanism formula instead of a single ingredient
- Sublingual delivery for faster, more consistent onset
- Up to 36-hour response window reduces timing pressure
- Clinician-reviewed and medically supervised
- Discreet, plain-packaging home delivery
- No charge if not approved
✗ Cons
- Requires a prescription and medical approval
- Higher monthly cost than generic single-ingredient options
- Not suitable for all health profiles
- Limited long-term independent research on the specific combined formulation
Pricing & What's Included
MEDVi QUAD is offered as a monthly subscription available in two plans: $114/month for 5 doses ($22.80 per dose) or $179/month for 10 doses ($17.90 per dose). Both plans cover the online medical consultation, prescription processing, the compounded medication itself, free rush shipping, and ongoing access to clinical support.
That's meaningfully more expensive than a bottle of generic sildenafil, but the comparison isn't quite apples-to-apples. MEDVi QUAD includes the doctor's visit equivalent, compounds four prescription medications, and handles fulfillment and follow-up in one plan. Whether that bundled value justifies the premium depends on your needs and how much you've struggled with conventional options.
If clinician review determines you're not a good candidate, no charge is applied.
The Ordering Process
Getting started is straightforward. You fill out an online medical questionnaire, the kind of information a clinician needs to evaluate safety and appropriateness. A licensed U.S. clinician reviews your responses and, if approved, a prescription is processed and shipped directly to your door in unmarked packaging. There's no in-person visit required.
Who Should Consider MEDVi QUAD?
MEDVi QUAD may be a good fit for men who have tried standard single-ingredient ED medications and found results inconsistent, or those who want a formula that addresses both the physical and psychological components of sexual response. It also suits users who prefer the convenience of an online telehealth process over a traditional in-person prescription visit.
It's likely not the best starting point for someone who has never tried ED medication before (where a lower-cost generic is a reasonable first step), anyone with cardiovascular contraindications, or those who prefer the simplest and most affordable approach.
MEDVi QUAD vs Viagra vs Cialis: Full Ingredient & Pricing Comparison
Most men evaluating MEDVi QUAD are coming from one of two directions: they've already tried generic sildenafil (Viagra) or tadalafil (Cialis) and want something stronger, or they're new to ED treatment and comparing all options. Here's a direct breakdown.
MEDVi QUAD vs Viagra vs Cialis
| Feature | MEDVi QUAD | Viagra (Sildenafil) | Cialis (Tadalafil) |
|---|---|---|---|
| Active Ingredients | 4 (PT-141, Sildenafil, L-Citrulline, Tadalafil) | 1 (Sildenafil) | 1 (Tadalafil) |
| Delivery | Sublingual liquid | Oral tablet | Oral tablet |
| Onset Time | 10–15 minutes | 30–60 minutes | 30–60 minutes |
| Duration Window | Up to 36 hours | 4–6 hours | Up to 36 hours |
| Food Effect | Minimal | Reduced with fatty meals | Minimal |
| Mental Arousal Support | Yes (PT-141) | No | No |
| Monthly Cost | $114/mo (5 doses) · $179/mo (10 doses) | $20–$60 (generic) | $30–$80 (generic) |
| Telehealth Included | Yes | Separate cost | Separate cost |
The core difference is breadth. Viagra and Cialis are proven, affordable single-ingredient options, excellent first choices for most men. MEDVi QUAD targets a different group: men who have already tried PDE5 inhibitors and want faster onset, broader mechanism coverage, or more flexibility in timing. The price premium reflects that expanded capability plus the bundled telehealth service.
For a wider view of how the leading telehealth options stack up, browse our in-depth ED provider reviews, where we evaluate each service on ingredients, pricing, and clinical oversight.
Who Should NOT Use MEDVi QUAD?
MEDVi QUAD is not appropriate for everyone. The online medical intake is designed to screen for contraindications, but here are the clearest disqualifying factors:
- Men taking nitrates (nitroglycerin, isosorbide) for heart conditions, combining PDE5 inhibitors with nitrates can cause a dangerous drop in blood pressure.
- Men with certain cardiovascular conditions, recent heart attack, unstable angina, or severe heart failure require medical clearance before any ED medication.
- Men on alpha-blockers or certain antifungals/antibiotics, drug interactions can amplify side effects.
- Men with severe liver or kidney impairment, metabolism of these compounds may be affected.
- Men seeking an over-the-counter or herbal option, MEDVi QUAD is a prescription compounded medication, not a supplement.
If any of the above apply, MEDVi's intake clinician will not approve a prescription, and no charge is applied. This safeguard is a feature, not a limitation.
Also Consider: DirectMax by DirectMeds
If you are evaluating MEDVi QUAD, it is worth comparing it directly against DirectMax, another multi-ingredient compounded ED formula with a similar telehealth-first approach.
MEDVi QUAD vs. DirectMax, Side-by-Side
| Feature | MEDVi QUAD | DirectMax |
|---|---|---|
| Formula | 4-in-1 (PT-141 + Sildenafil + L-Citrulline + Tadalafil) | Triple-action (Apomorphine + Sildenafil + Tadalafil) |
| Delivery Format | Sublingual liquid (under the tongue) | Rapid dissolve tablet |
| Onset Time | 10–15 minutes | ~15 minutes |
| Duration Window | Up to 36 hours | Up to 36 hours |
| Starting Price | $114/mo (5 doses) · $179/mo (10 doses) | From $7.45/dose |
| Desire Pathway | PT-141 (peptide) | Apomorphine |
| Prescription Required | Yes | Yes |
| Best For | Men wanting the most comprehensive multi-pathway formula | Men seeking a lower per-dose cost with triple-action coverage |
MEDVi QUAD vs Rugiet Ready vs FeelGood QUAD
MEDVi QUAD is not the only 4-in-1 compounded ED formula on the market. Rugiet Ready and FeelGood QUAD are the two closest competitors, all three target men who want broader multi-ingredient coverage than single-molecule generics.
- Rugiet Ready, Combines Sildenafil, Tadalafil, and Apomorphine in a sublingual troche (wafer). Similar onset and duration to MEDVi QUAD, but uses Apomorphine for desire rather than MEDVi's PT-141, and has no L-Citrulline blood-flow booster. Popular for its troche format over liquid. Starting price comparable to MEDVi.
- FeelGood QUAD, A 4-in-1 sublingual tablet using Apomorphine, Vardenafil, Sildenafil, and Tadalafil, a different ingredient mix from MEDVi QUAD's PT-141 and L-Citrulline approach. Starts at $114/month, slightly less than MEDVi. Ideal for those who prefer a tablet over a liquid.
- BraveRX, 3-in-1 formula (Tadalafil 15mg + Apomorphine 3mg + Sildenafil 40mg) in an oral dissolving tablet. Strong emphasis on the neurological arousal pathway via Apomorphine. Different format and dosing profile from MEDVi QUAD.
MEDVi QUAD's differentiator is its liquid sublingual delivery and its combination of a PT-141 desire peptide and an L-Citrulline blood-flow booster alongside two proven PDE5 inhibitors. If pricing is the priority, FeelGood QUAD is the closest priced tablet alternative at slightly lower cost. If you prefer a troche format, Rugiet Ready is the logical alternative to compare.
Final Verdict
So, back to my opening question — real upgrade or dressed-up markup? My honest read is that MEDVi QUAD is a genuinely thought-through, clinician-managed formula, not a gimmick. Stacking PT-141, sildenafil, L-Citrulline, and tadalafil into one sublingual dose to hit desire, firmness, blood flow, and duration together is a coherent idea, and the sublingual delivery is a real practical edge over a pill you have to time around dinner.
But I won't oversell it. It's not a cure-all, it costs more than a generic, and if you've never tried ED medication at all, starting here is paying for complexity you haven't yet found out you need. Where it clearly earns the premium is the man who's already hit the ceiling of what a single-ingredient tablet does — for him, the broader formula is the point, not the price. Match it to that situation and it's a legitimate, well-run option worth exploring under medical supervision.
As always, discuss any prescription ED treatment with a qualified healthcare provider before starting.
Not sure MEDVi is the right provider? Compare it against our top-rated picks on our Best ED Providers list.
Frequently Asked Questions
Is MEDVi QUAD a supplement?
No. MEDVi QUAD is a prescription-only compounded medication that requires clinician approval. It is not sold over the counter and should not be confused with herbal ED supplements.
How quickly does MEDVi QUAD work?
Because it is absorbed sublingually (under the tongue) rather than swallowed, many users report effects within 10–15 minutes. This is faster than most standard oral ED tablets, though individual timing varies based on health, dosage, and other factors.
Will MEDVi QUAD cause a constant erection?
No. MEDVi QUAD creates a response window, an erection requires natural sexual stimulation during that window. It does not cause automatic or prolonged erections (priapism risk is extremely low at prescribed doses but should be discussed with your clinician).
Does MEDVi QUAD interact with food?
Less so than standard oral tablets. Because it is absorbed under the tongue rather than through the digestive system, heavy or fatty meals have less impact on onset time and absorption compared to swallowed sildenafil or tadalafil pills.
What if I am not approved by the clinician?
If a licensed U.S. clinician reviews your intake and determines MEDVi QUAD is not appropriate for your health profile, no charge is applied. You only pay if a prescription is approved and dispensed.
How does MEDVi QUAD compare to Viagra?
Viagra (sildenafil) is a single-ingredient PDE5 inhibitor that takes 30–60 minutes orally to work and lasts 4–6 hours. MEDVi QUAD contains sildenafil plus three other active ingredients (PT-141, L-Citrulline, tadalafil) delivered sublingually, potentially working in 10–15 minutes with a 36-hour window. It is more expensive but offers a multi-mechanism approach.
How does MEDVi QUAD compare to Cialis?
Cialis (tadalafil) is a once-daily or as-needed oral tablet lasting up to 36 hours. MEDVi QUAD includes tadalafil as one of its four ingredients but adds PT-141 (desire), L-Citrulline (blood flow), and sildenafil (firmness) in a single sublingual dose. It may suit men who want broader coverage than tadalafil alone.
Is MEDVi safe to use?
MEDVi QUAD is dispensed only after a licensed clinician reviews your medical history. It is not suitable for men taking nitrates, those with certain cardiovascular conditions, or those on contraindicated medications. Common side effects include headache, flushing, nasal congestion, and mild nausea. Always disclose your full medication list during the intake process.
Can I get MEDVi QUAD without a doctor visit?
There is no in-person visit required. MEDVi operates through a fully online telehealth platform. You complete a detailed medical questionnaire, a licensed U.S. clinician reviews it, and, if approved, medication is dispensed and shipped discreetly to your door.
Does insurance cover MEDVi QUAD?
MEDVi QUAD is a compounded medication and is generally not covered by standard insurance plans. Pricing is $114/month for 5 doses or $179/month for 10 doses, and includes the consultation, prescription, medication, and shipping — no hidden fees.
How does MEDVi QUAD compare to Rugiet Ready?
MEDVi QUAD and Rugiet Ready are two of the most comparable sublingual compounded ED medications on the market. Both share Sildenafil and Tadalafil in a sublingual format with rapid onset (10–15 minutes) and a 36-hour response window. Rugiet Ready adds Apomorphine, while MEDVi QUAD pairs PT-141 for desire with an L-Citrulline blood-flow booster and is priced at $114/month for 5 doses or $179/month for 10 doses. Rugiet Ready starts at a similar price point and uses a troche (sublingual wafer) rather than a liquid. The choice between them often comes down to preference for delivery format and which desire pathway (PT-141 vs. Apomorphine) suits your response profile.
How does MEDVi QUAD compare to FeelGood QUAD?
Both MEDVi QUAD and FeelGood QUAD are 4-in-1 compounded ED formulas, but their ingredients differ. MEDVi QUAD combines PT-141, Sildenafil, L-Citrulline, and Tadalafil, while FeelGood QUAD uses Apomorphine, Vardenafil, Sildenafil, and Tadalafil. Delivery differs too: FeelGood QUAD starts at $114/month and uses a sublingual tablet format, while MEDVi QUAD uses a liquid sublingual formula priced at $114/month for 5 doses or $179/month for 10 doses. Both are clinician-prescribed and delivered via telehealth.
Is MEDVi QUAD legitimate?
Yes. MEDVi QUAD is dispensed by a licensed U.S. compounding pharmacy and requires clinician approval before any prescription is processed. It is a legitimate prescription-only compounded medication, not a supplement or over-the-counter product. Compounded medications combine FDA-approved active ingredients into a custom formulation prepared by a licensed pharmacy. MEDVi operates through a regulated telehealth intake and does not dispense medication without clinical review.
What is the MEDVi QUAD dosage?
MEDVi QUAD dosage is determined by the prescribing clinician based on your health profile and intake responses. It is a liquid sublingual formula taken under the tongue before sexual activity. Dosing guidance, including the specific concentration of each of the four ingredients, is provided with your prescription and may be adjusted based on your response and tolerance. Do not self-adjust the dose without consulting your MEDVi clinician.
How do I cancel my MEDVi QUAD subscription?
MEDVi subscriptions can be cancelled by contacting MEDVi customer support directly. There is no long-term contract required, and the subscription is month-to-month. If you decide MEDVi QUAD is not right for you, you can cancel before the next billing cycle. Contact MEDVi through their website or the support email provided with your order confirmation.
How do I buy MEDVi ED and sign up online?
You buy MEDVi ED entirely online: the MEDVi telehealth ED platform starts with a brief medical questionnaire, a licensed U.S. clinician reviews it, and — if MEDVi ED medication is appropriate — your prescription ships discreetly to your door. The MEDVi ED sign up takes only a few minutes, requires no in-person visit, and there is no charge unless a prescription is approved. MEDVi ED treatment is prescription-only, so a clinician review is always part of buying MEDVi ED online.
How much does MEDVi QUAD cost per dose?
MEDVi QUAD price works out to about $22.80 per dose on the $114 five-pack and about $17.90 per dose on the $179 ten-pack, so the quad medvi price drops as you buy more. That MEDVi QUAD cost is all-inclusive — consultation, compounded prescription, shipping, and support — rather than a separate charge for each item.
Is QUAD good for ED, and does MEDVi QUAD really work?
For the right candidate, QUAD is a strong option for ED: it pairs two proven PDE5 inhibitors (Sildenafil and Tadalafil) with PT-141 for desire and L-Citrulline for blood flow, so it addresses more of the sexual-response cycle than a single pill. This quad ED medicine works best for men who have already tried standard ED treatment and found it inconsistent; if you have never tried an ED medication, a lower-cost generic is a sensible first step.
How many doses are in a bottle of QUAD?
Five or ten, depending on the plan your clinician approves. The $114/month plan — what people usually mean by the "MEDVi QUAD 5 pack" — includes 5 sublingual doses, which works out to about $22.80 each. The $179/month plan includes 10 doses at about $17.90 each. Both plans bundle the consultation, the compounded prescription, shipping, and clinical support, and there is no partial-refill option if you use your doses early in a cycle.
Is there a MEDVi QUAD dosage chart with exact mg strengths?
No, and that is a consequence of compounding rather than an oversight. QUAD is prepared per patient, so the concentrations of PT-141, sildenafil, L-Citrulline, and tadalafil are set by the reviewing clinician from your intake answers rather than sold as fixed off-the-shelf strengths. Two men on the same monthly plan can be on different concentrations. Your dosing instructions ship with the medication and are specific to your prescription — any milligram figures you find on a forum belong to somebody else's script.
How do you take MEDVi QUAD?
Place the prescribed amount of liquid under your tongue and hold it there for roughly 60 to 90 seconds before swallowing what remains, rather than swallowing it straight down. That sublingual contact time is what lets the compounds bypass the digestive tract, which is why onset can land near 10 to 15 minutes. Take it 10 to 15 minutes before sexual activity, and no more than one dose in a 24-hour period. Do not repeat a dose because the first felt weak and never stack it with Viagra, Cialis, or another PDE5 inhibitor.
How long does MEDVi QUAD last?
The response window runs up to roughly 36 hours, driven by the tadalafil component — meaningfully longer than the 4 to 6 hours typical of a sildenafil-only tablet. That window is not a continuous erection: it is a period during which an erection can occur with natural sexual stimulation. In practice it means timing matters far less than with a standard pill, since one dose can cover most of a weekend.
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Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a licensed healthcare provider before starting or changing any prescription treatment. Individual results may vary.
Disclosure: ExploreTreatments.com may earn a commission if you begin treatment through links on this page, at no additional cost to you. This does not influence our editorial assessment.
About This Review
- Researched by
- Charly P., Founder and Telehealth Researcher
- Last Reviewed
- June 2026
- Disclosure
- ExploreTreatments may receive compensation from partner links. This does not influence our editorial process. Read our editorial policy.