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Arginine and Sildenafil: Why This Pair Is on Caution Lists
Mayo Clinic says arginine might lower blood pressure, so combining it with sildenafil (Viagra, Revatio), nitrates for chest pain or blood pressure drugs might make pressure too low. VapoCept lists 200 mg of L-arginine and 200 mg of arginine AKG, so ask a doctor or pharmacist first.
Written by the VapoCept label deskUpdated · 4 min read
The caution01
Why are arginine and sildenafil on interaction lists?
Both are linked to wider blood vessels and lower pressure, so together they might push pressure too low.
Mayo Clinic's page says arginine might lower blood pressure. Combined with blood pressure drugs, nitrates for chest pain or sildenafil, it might cause blood pressure to become too low (Mayo Clinic, L-arginine).
The list02
Which medicines and conditions call for a conversation first?
Blood pressure drugs, nitrates, sildenafil-type drugs, blood thinners and a recent heart attack.
| Medicine or condition | Concern raised |
|---|---|
| Blood pressure medicines | Additive lowering (Mayo and MSK) |
| Nitrates for chest pain | Pressure might become too low (Mayo) |
| Sildenafil (Viagra, Revatio) | Pressure might become too low (Mayo) |
| Anticoagulant or antiplatelet drugs | Might raise bleeding risk (Mayo) |
| Recent heart attack | Not recommended; might raise risk of death (Mayo) |
Memorial Sloan Kettering lists blood pressure medicines but does not mention nitrates or sildenafil (MSK, Arginine (About Herbs)).
This panel03
Does the small arginine amount in VapoCept remove the concern?
We cannot say it does. We found no source that sets a safe amount of arginine alongside these drugs.
As listed in the brand's panel, one capsule has 200 mg of L-arginine and 200 mg of L-arginine AKG. Blood pressure trials used 4,000 to 24,000 mg a day, so the label is small by comparison. Small is not zero.
The five questions below cover medicines, conditions, pregnancy and emergencies. The medicines guide has more.
VapoCept: 30 capsules, 30-day bottleOne capsule a day · 2, 3 or 6 bottles · $49 to $79 a bottle per the brand information, confirm at checkout
See packsNext step04
What should you ask your pharmacist or doctor?
Ask whether arginine and citrulline fit with every medicine you take, not only the ones named above.
Do not stop or change a prescribed medicine for a supplement. Chest pain, fainting or a racing heart after a new supplement needs urgent care.
If you get the all-clear and choose VapoCept, the packs are below. Checkout shows live totals, and the side effects page lists more cautions.
90-day supply
3 bottles: 90 days
$69a bottle · $207 for 3 · per the brand information
Ships from the U.S. · 60-day guarantee per the sales page
Order 3 bottles
180-day supply
6 bottles: 180 days
$49a bottle · $294 for 6 · per the brand information
Ships from the U.S. · 60-day guarantee per the sales page
Order 6 bottlesPrices follow the brand information; confirm the live price at checkout. A 2-bottle pack is also offered. Check your medicines with your doctor or pharmacist before you order.
FAQ05
VapoCept questions people ask
Can you take L-arginine with Viagra?
Mayo Clinic says the combination might make blood pressure too low. That is a possible risk, not a certain one. Ask your pharmacist before you combine them, and mention any nitrate you take as well.
Does citrulline interact with sildenafil too?
Citrulline is converted into arginine in the body, and blood pressure studies show small drops at gram doses. We found no source that clears the combination, so the same pharmacist check applies.
What are signs that blood pressure has dropped too low?
Dizziness, lightheadedness and fainting are common signs. Chest pain or a racing heart needs urgent care. Sudden confusion, trouble speaking or one-sided weakness needs a 911 call.
Sources (2)
- L-arginineMayo Clinic, 2026
- ArginineMemorial Sloan Kettering Cancer Center (About Herbs), 2022
Who wrote this06
Written and reviewed by
Pages built from the brand information, the brand's images and linked NIH, FDA, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site of Vapocepts, the U.S. stocking partner for VapoCept. It is not the manufacturer and it is not the sales page. We earn money when you buy through our order links.
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Check your medicines first, especially blood pressure, nitrate or erectile dysfunction medicine, then pick a supply. One capsule a day; one bottle lasts a month. The checkout shows the live price and the guarantee terms before you pay.
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