Sexual Health
What medications should you disclose before sildenafil online?
Nitrates, poppers, riociguat, alpha blockers, other ED products and hidden drugs in supplements: what to tell your provider before starting sildenafil.
Before requesting sildenafil online, tell the provider about everything you take: prescriptions, over-the-counter medicines, vitamins, supplements and recreational substances, including anything you use only occasionally or stopped recently. Put nitrates, poppers and riociguat at the top of the list. Then add other erection treatments, alpha blockers, blood pressure medicines and medicines that change how your body clears sildenafil.
Don't stop a medicine you need just to make sildenafil possible. The provider's job is to review the whole picture, and they can only review what you tell them.
What medications should you disclose before sildenafil online?
Give the reviewing provider your complete list, not one you've already filtered for interactions. A medicine's purpose doesn't tell you whether it matters. Medicines for urinary symptoms, infections, HIV, blood pressure and even hair loss can change a sildenafil decision.
The table follows the FDA-approved Viagra (sildenafil) label, the reference label for generic sildenafil tablets. Use the exact names on your containers, not your memory.
| Medicine or substance | Examples to disclose | Why it matters | What the review needs to establish |
|---|---|---|---|
| Nitrates | Nitroglycerin; isosorbide mononitrate; isosorbide dinitrate | Combining nitrates with sildenafil can cause a dangerous blood pressure drop | Whether you use any nitrate, including an occasional rescue medicine |
| Recreational nitrites | Amyl nitrite or butyl nitrite, often called poppers | These also create a dangerous interaction with sildenafil | What you used and when you last used it |
| Guanylate cyclase stimulators | Riociguat | FDA labeling prohibits use together because of blood pressure effects | Whether this medicine is part of your treatment |
| Other erection treatments | Tadalafil, vardenafil, avanafil; sildenafil from any other source, including Revatio; combination troches such as Mint Mojo or Mint Vibe; injections such as Trimix | The label says combining sildenafil with other PDE5 medicines or ED treatments hasn't been studied and may lower blood pressure further, so it isn't recommended | Every ingredient, formulation and last use |
| Alpha blockers | Tamsulosin, doxazosin, terazosin | Combined blood pressure effects can cause dizziness or fainting | Your exact medicine, schedule, and any symptoms |
| Other blood pressure medicines | Amlodipine and other prescribed blood pressure treatments | Sildenafil can add to blood pressure lowering | Your full regimen and history of low blood pressure |
| Medicines that raise sildenafil exposure | Ritonavir and other HIV protease inhibitors; ketoconazole, itraconazole; erythromycin, clarithromycin | These slow sildenafil breakdown. In a label study, ritonavir raised sildenafil exposure about 11-fold | Whether the prescribing plan needs to change |
| Medicines that increase drug breakdown | Rifampin and other enzyme-inducing medicines | These can reduce sildenafil exposure | Whether treatment effectiveness or selection needs reassessment |
| Nonprescription products | Male enhancement or "energy" supplements, herbal products, vitamins | FDA warns many enhancement products contain hidden drug ingredients | The actual package and ingredient label |
An online visit depends on what you share. A provider can't account for the nitroglycerin spray in your glove box, a 'natural' pill from a gas station, or a prescription from another clinic unless you mention it.
Nitrates, poppers, and riociguat: flag these first
Nitrates are not simply another medicine to add at the bottom of your list. FDA-approved sildenafil labeling identifies nitrate use, whether regular or intermittent, as a contraindication, meaning a reason the medicines must not be used together.
Nitroglycerin can come as tablets, sprays, patches, or other formulations. Tell the provider about it even if you have not needed it recently. Also disclose isosorbide products and any recreational nitrites called poppers; their recreational use does not make the interaction less important.
Riociguat is a separate medicine used for certain forms of pulmonary hypertension. It is not a nitrate, but combining it with sildenafil is also contraindicated because of blood pressure effects.
The label also says it's unknown when nitrates can safely be given after sildenafil. That's why emergency clinicians need to know you took it and when.
Do not withhold or stop these medicines to obtain sildenafil. If you are unsure whether a heart medicine is a nitrate, provide its exact name and ask the pharmacist to identify it. Do not guess at a safe interval between treatments.
Other erection treatments: count every PDE5 ingredient
Tell the provider about tadalafil, vardenafil, avanafil and any sildenafil you already have, whether it came from another telehealth service, a local pharmacy, a specialist or an old prescription.
Combination products count too. Mint Mojo contains tadalafil, and Mint Vibe contains both sildenafil and tadalafil. Adding a sildenafil tablet to either one stacks medicines from the same class. These are examples for your list, not products to combine.
Sildenafil is also prescribed for pulmonary arterial hypertension, which is high blood pressure in the lungs, under the brand Revatio and as generics. The Viagra label says not to use it with Revatio or other PDE5 medicines. If you take sildenafil for your lungs, say so, even if you don't think of it as an erection medicine.
Injections such as Trimix work differently, but they still belong on the list. Give the provider the route, meaning how you take it, and the full ingredient list. Never combine erection treatments unless your prescriber has specifically directed it.
Blood pressure and urinary medicines: review, not automatic exclusion
Alpha blockers can treat urinary symptoms from an enlarged prostate or high blood pressure. Examples include tamsulosin, doxazosin, and terazosin. When combined with sildenafil, their blood pressure effects can cause symptoms such as lightheadedness or fainting.
The label asks prescribers to make sure you're stable on an alpha blocker before starting sildenafil, and to start low.
Other blood pressure medicines also belong on the list. Taking one does not automatically rule out sildenafil, but the reviewing provider needs to assess the combination, your health history, and any symptoms.
In a label study of people taking amlodipine for high blood pressure, adding sildenafil lowered blood pressure by an average of about 8 points systolic and 7 points diastolic. Your provider needs to know about every blood pressure medicine you take.
Report dizziness when standing, fainting episodes, or a history of low blood pressure. If you know your recent blood pressure readings, share the readings and when they were taken; do not invent or estimate them.
Some medicines have uses outside the condition you associate with them. Oral minoxidil, for example, can lower blood pressure even when prescribed for hair loss. If your label says minoxidil 2.5 mg, copy that name and strength rather than writing only “hair treatment.”
Infection medicines and HIV treatment: timing matters
Some medicines change the activity of enzymes that break down sildenafil. When breakdown slows, sildenafil exposure can increase. That makes the exact medicine important, even when it is only a short course.
Disclose HIV treatments such as ritonavir and other protease inhibitors, antifungal medicines such as ketoconazole or itraconazole, and antibiotics such as clarithromycin or erythromycin. These examples are not a complete interaction list.
Other medicines, including rifampin, can increase drug breakdown and reduce sildenafil exposure. A weaker effect is not a reason to take more sildenafil on your own; ask the prescriber to reassess the treatment.
For a short antibiotic or antifungal course, include the start date, planned end date, and last dose if you have finished. The provider or pharmacist should decide whether recent treatment still matters. Do not create your own waiting period from general advice online.
Supplements and 'natural' enhancers: the hidden PDE5 problem
Some of the riskiest items on a medication list don't look like medicine. FDA warns that many products sold as male enhancement supplements, energy pills or all-natural ED treatments are contaminated with hidden drug ingredients. A study of FDA warnings from 2007 through 2016 found that sildenafil was the most common hidden ingredient in adulterated sexual enhancement supplements.
That matters two ways. A hidden PDE5 drug can stack on top of your prescription, and it carries the same nitrate danger. If you use any enhancement product, bring the package or a photo of its label to your visit. The safest move is to stop buying them, but tell your provider either way.
An interaction does not always mean the same outcome. Nitrates and riociguat are prohibited combinations; other medicines require an individualized prescribing assessment. Do not treat every warning as either harmless or an automatic rejection.
How do you prepare your medication list?
Use your current containers and pharmacy records to build your medication list. Photos can help you copy information accurately, but make sure the ingredient list and directions are readable.
- Gather labels. Include prescriptions, nonprescription medicines, vitamins, supplements, injections, creams, and recreational substances.
- Record actual use. Write the strength, formulation, schedule, and last use. Include the form, such as tablet, troche, spray, injection or cream.
- Add recent changes. Include medicines recently started, stopped, or taken only when needed, plus any reactions.
- Share the list. Provide it during the clinical review and update it whenever another clinician changes treatment.
Keep one version you can update. A saved list is useful only if it reflects what you take now; a prescription history alone does not explain whether you stopped a medicine or still use it occasionally.
What happens after you disclose your medicines?
A licensed provider reviews your list along with your symptoms and health history, and decides whether sildenafil is appropriate. Sometimes the next step is a question back to you rather than a prescription.
Your pharmacist helps with the medication questions: ingredients, directions and interactions, before and after delivery. Client Care handles orders and accounts. If another clinician adds a medicine later, tell your pharmacist before your next sildenafil dose. The guide on when to call the pharmacy team explains which questions go where.
What if you have symptoms after taking sildenafil?
Seek emergency help for chest pain, fainting, or severe symptoms after sildenafil. Tell emergency personnel that you took sildenafil and when. Do not self-treat chest pain with a nitrate after sildenafil; emergency clinicians need that information to choose appropriate treatment.
An erection lasting more than 4 hours requires immediate medical help, even without pain. Sudden vision loss or a sudden decrease or loss of hearing also requires urgent medical attention; FDA labeling directs patients to stop sildenafil and seek care for these symptoms.
Do not wait for an online message response when symptoms require urgent care. Call 911 for a medical emergency, and bring or share your medication list when possible.
FAQ
Do I need to disclose supplements before requesting sildenafil online?
Yes. Disclose vitamins, herbal products, and sexual-enhancement supplements before requesting sildenafil online. Share the actual ingredient label because the product name alone does not establish its contents or safety. Many enhancement products have been found to contain hidden sildenafil or similar drugs.
Can I take sildenafil if I have nitroglycerin but rarely use it?
Sildenafil is contraindicated with nitrate use, including intermittent use. Tell the reviewing provider that you have nitroglycerin and how you use it; do not stop your heart treatment or choose a waiting interval yourself.
Does taking blood pressure medicine automatically rule out sildenafil?
No. Blood pressure medicine does not automatically rule out sildenafil, but the exact combination needs licensed-provider review. Report low blood pressure, dizziness, and fainting as well as your medicine names.
Should I mention tadalafil, Mint Mojo or Mint Vibe if I took one recently?
Yes. All three contain tadalafil, and Mint Vibe also contains sildenafil. Disclose which you took, when you last took it, and any other erection treatments. Do not combine treatments or decide on a waiting period without your licensed provider's direction.
Do antibiotics matter if I have already finished the course?
Yes. Recently finished antibiotics can still be relevant to the medication review. Give the exact name and last-dose date so the provider or pharmacist can assess the timing.
The medicine you rarely take matters most
The medicine you almost forgot is often the one that matters: the rescue nitroglycerin, the occasional supplement, the prescription from another service. Put it on the list.
When your list is ready, the sildenafil tablets page explains how to request treatment. If you're weighing options, see what changes when you switch from sildenafil to tadalafil, or compare sexual health treatments. Questions about something on your list? Talk with a MintRx pharmacist before your visit.
Assigned reviewer: Nathan Parker, PharmD
Sources
- DailyMed, Viagra (sildenafil citrate) tablets prescribing information and patient information
- FDA, Sexual Enhancement and Energy Product Notifications
- Tucker J, et al. Unapproved pharmaceutical ingredients included in dietary supplements associated with US Food and Drug Administration warnings. JAMA Netw Open. 2018
