M1-4add + Sildenafil
Sildenafil brand name: Revatio.
We found no known interaction between M1-4add and Sildenafil in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first.
M1-4add and Sildenafil
We checked these two against our interaction database. Here is what we found.
No Known Interaction Found
We did not find a documented interaction between Sildenafil and M1-4add in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.
Worth understanding: our licensed dataset holds no drug-interaction record for M1-4add at all — not against Sildenafil, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.
If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.
Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.
M1-4add safety at a glance
Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
M1-4add in Pregnancy & Breastfeeding
When used orally. Prohormones can be converted to active hormones in the body and cause adverse effects such as menstrual irregularities, infertility, hair loss, and acne. Prohormones have also been associated with hepatotoxicity and increased risk of cardiovascular disease. The U.S. Food and Drug Administration and other regulatory agencies warn that dietary supplements containing prohormones are dangerous. Avoid using.
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center
Questions About M1-4add or Sildenafil
These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers M1-4add or Sildenafil, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:
- Which Medications Interact With Nitric Oxide Supplements? ›
- Can You Cut, Split Or Crush Viagra (Sildenafil Citrate)? ›
Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.
See Every Supplement That Interacts With Sildenafil
This page covers M1-4add only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Sildenafil page lists 160 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), American Mistletoe (major), Grapefruit (major), Hawthorn (major) and St. John's Wort (major).
By severity: 5 major · 114 moderate · 41 minor.
From our pharmacist’s overview on the Sildenafil page
“Sildenafil relaxes blood vessels, whether prescribed as Revatio for pulmonary hypertension or as Viagra, and that blood-pressure-lowering action makes this list one to treat with genuine care. Of the 160 supplement and herbal ingredients on file, five carry a major rating, and those deserve understanding first.”
Reviewed by 2 · Jul 18, 2026
Where M1-4add and Sildenafil Sit Against Everything Else
Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.
#1,044 of 1,452 supplements looked up here in the last 7 days
#360 of 2,830 medications looked up here in the last 7 days
Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.
Where does our data come from?
- Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
- Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every M1-4add reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The M1-4add and Sildenafil records this page draws on were last updated June 22, 2026.
- What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
About M1-4add
What is M1-4add?
"M1-4add" does not match any recognized dietary supplement, herb, or botanical that we can confidently identify. Because we cannot verify what this product is, we cannot describe its uses, safety, or dosing. Please check the product label and ingredient list, and talk with a pharmacist or doctor before using anything with this name.
An interaction check asks whether these two react with each other — it does not ask whether M1-4add is a good idea for someone in your situation. Here is what our M1-4add record says about it on its own.
M1-4add: dosing
There is no established or recognized dose for M1-4add because the product cannot be identified. Never assume a higher dose is safer or more effective.
From our M1-4add monograph — the full record covers uses, side effects and every documented interaction.
About Sildenafil
What Is Sildenafil Used For?
Brand name: Revatio
Sildenafil treats two distinct conditions depending on the product. Viagra (tablet) and Vybrique (dissolving oral film) are approved for erectile dysfunction (ED) — difficulty getting or keeping an erection. Generic sildenafil tablets and oral film are also approved for ED.
Revatio and several generic sildenafil products (tablets, oral suspension, and injection) are used for pulmonary arterial hypertension (PAH) — high blood pressure in the arteries of the lungs — in adults to improve exercise ability and slow the disease from getting worse. Revatio oral suspension and injection are also approved for PAH in children ages 1 to 17.
Most-Reported Side Effects for Sildenafil
From FAERS, the FDA’s public side-effect reporting system (126,564 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & M1-4add
Browse every other medication we’ve checked against M1-4add — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked M1-4add against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Losartan Potassium ›
- Metoprolol ›
- Aspirin ›
- Ivermectin ›
- Rivaroxaban ›
- Rosuvastatin ›
- Escitalopram ›
- Acetaminophen ›
- Tadalafil ›
- Clopidogrel ›
- Atorvastatin ›
- Valacyclovir ›
- Docusate ›
- Hydroxyurea ›
- Abemaciclib ›
- Methamphetamine ›
- Ibuprofen ›
- Sumatriptan ›
- Semaglutide ›
- Tirzepatide ›
- Warfarin Sodium ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Bupropion ›
- Metformin ›
- Amoxicillin ›
- Acyclovir ›
- Lisinopril ›
- Bendamustine ›
- Amitriptyline ›
- Doxycycline ›
- Methotrexate ›
- Lamotrigine ›
- Fluoxetine ›
- Amphetamine ›
- Pregabalin ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Azithromycin ›
- Dextroamphetamine ›
- Isotretinoin ›
- Clonazepam ›
- Omeprazole ›
- Quetiapine ›
- Methylene Blue ›
- Amlodipine Besylate ›
- Duloxetine ›
- Letrozole ›
- Buspirone ›
- Citalopram ›
- Ciprofloxacin ›
- Naproxen ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full M1-4add list.
M1-4add References
The 1 references that drive our M1-4add monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.
- Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100. PubMed
Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Taking M1-4add and Sildenafil Together: Common Questions
Is it safe to take M1-4add with Sildenafil?
Does Sildenafil interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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Still Have a Question About Sildenafil and M1-4add?
Our pharmacists answer your medication & supplement questions — free.
This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.