What happens when you take beetroot with sildenafil?
Both beetroot and sildenafil act on the same blood-vessel-relaxing pathway, just from different ends. Here is the chain of events when they overlap:
- Beetroot delivers inorganic nitrate. Beetroot is one of the richest dietary sources of inorganic nitrate. After you swallow it, bacteria on your tongue and in your gut convert the nitrate to nitrite.
- Nitrite becomes nitric oxide. Your body turns that nitrite into nitric oxide, a natural signalling molecule that relaxes the smooth muscle in blood vessel walls and gently lowers blood pressure.
- Sildenafil blocks the off-switch. Sildenafil inhibits an enzyme called phosphodiesterase type 5 (PDE5). PDE5 normally breaks down cyclic GMP, the chemical messenger that nitric oxide uses to keep vessels relaxed. With PDE5 blocked, that relaxation signal lingers.
- The two effects can add up. Beetroot raises nitric oxide production while sildenafil slows the clearing of the resulting signal. In principle the effects are additive, producing a slightly larger or longer dip in blood pressure than either alone.
It is worth being clear about the strength of the evidence: beetroot's blood-pressure-lowering effect and the nitric-oxide/cGMP mechanism are both well documented in people. The specific beetroot-plus-sildenafil additive drop, however, is reasoned from that mechanism rather than proven by case reports. It is a sensible caution, not a recorded emergency.
Why is this important?
The formal contraindication printed on sildenafil's label is for organic nitrate drugs such as nitroglycerin and isosorbide, which can cause a sudden, severe, and occasionally fatal drop in blood pressure when combined with a PDE5 inhibitor. Dietary nitrate from food is chemically and pharmacologically different, and major regulators and the cardiovascular literature do not treat nitrate-containing vegetables as a contraindication.
The grey area is concentrated beetroot products. A beetroot juice shot or a nitrate-based pre-workout supplement is not really food in the everyday sense; it delivers a much larger, more drug-like load of nitrate that produces a measurable, sustained fall in blood pressure. Layer sildenafil on top of that and some people may feel the combined effect as dizziness on standing, a throbbing headache, flushing, palpitations, or faintness.
People with naturally low blood pressure, those taking other blood-pressure medicines, older adults, and anyone who is dehydrated are the most likely to notice these effects. For most occasional users eating normal amounts of beets, the practical risk is small.
What should you do?
The guiding principle is simple: treat whole beets as food, but treat concentrated nitrate products as something closer to a mild blood-pressure medicine and keep them clear of your sildenafil dose.
- Before any change: if you already take a blood-pressure medication alongside sildenafil, talk to your prescriber before adding a regular beetroot or nitrate supplement, and introduce it slowly as you would any new blood-pressure-affecting product.
- On a day you take sildenafil: skip concentrated beetroot juice shots, beetroot powders, and nitrate pre-workout supplements. Whole roasted, boiled, or pickled beets in normal serving sizes are fine and do not need to be timed around your dose.
- After taking both: if you feel lightheaded, get a pounding headache, or feel faint, sit or lie down and hydrate until it passes. Seek urgent medical attention for persistent symptoms or any chest pain.
If you use a daily beetroot supplement, review it with your doctor or pharmacist so they can account for it in your overall blood-pressure picture.
Which specific products are affected?
On the medication side, this applies to all PDE5 inhibitors in the sildenafil family, including Viagra for erectile dysfunction and Revatio for pulmonary arterial hypertension, as well as generic sildenafil.
On the beetroot side, the products most worth separating from sildenafil are concentrated beetroot juice (brands such as Beet It, Love Beets, and James White), beetroot powder shots and capsules marketed for blood pressure, athletic performance, or nitric-oxide support, and pre-workout supplements that list beetroot extract or sodium nitrate as a main ingredient.
Whole roasted or pickled beets in ordinary serving sizes deliver far less nitrate and are not a practical concern for most people. The interaction is driven by the concentrated nitrate dose, not by beets as a food.
The science behind it
A randomized, double-blind, placebo-controlled crossover study of beetroot juice found that a single dose meaningfully lowered aortic systolic blood pressure within about half an hour compared with placebo, confirming that dietary nitrate has a real, measurable blood-pressure-lowering effect in humans (Kukadia et al., PMC6369216).
The interaction mechanism itself is well described in pharmacology reviews: when PDE5 is inhibited, nitric oxide drives cyclic GMP to accumulate, which is exactly why combining PDE5 inhibitors with nitrates exaggerates vasodilation and lowers blood pressure (EBM Consult, nitrate + PDE5 inhibitor mechanism).
Applying that mechanism to beetroot specifically, clinical pharmacy guidance rates beetroot extract with PDE5 inhibitors as a moderate caution, noting it may enhance nitric-oxide effects and lower blood pressure further, and advising cautious use (Bolt Pharmacy). Notably, the beetroot-plus-sildenafil combination is supported by mechanism and expert caution rather than by documented adverse-event reports.
Frequently Asked Questions
Can I eat beets at all while taking sildenafil?
Yes. Whole beets in normal food amounts, such as a salad or a side dish, deliver far less nitrate than the concentrated products studied in blood-pressure trials and are not a practical concern for most people.
Is beetroot the same as the nitrate drugs sildenafil warns about?
No. The label contraindication is for organic nitrate medicines like nitroglycerin and isosorbide. Dietary nitrate from beetroot is different and is not treated as a contraindication, though concentrated beetroot products behave more like a mild blood-pressure agent than like food.
What symptoms should I watch for?
Lightheadedness on standing, a pounding headache, flushing, palpitations, or faintness. If these appear, sit or lie down and hydrate; persistent symptoms or chest pain need urgent care.
Who is most at risk of feeling the combined effect?
People with naturally low blood pressure, anyone on other blood-pressure medications, older adults, and people who are dehydrated are the most likely to notice the additive blood-pressure-lowering effect.
Should I time my beetroot shot away from my sildenafil dose?
The simplest approach is to skip concentrated beetroot shots, powders, and nitrate pre-workouts on a day you plan to take sildenafil, rather than trying to space them by a few hours.
Do I need to tell my doctor about a daily beetroot supplement?
Yes. A regular nitrate supplement can shift your blood-pressure baseline, so review it with your doctor or pharmacist, especially if you also take other blood-pressure medicines.
Key takeaways
- Beetroot and sildenafil act on the same nitric-oxide pathway, so their blood-pressure-lowering effects can be additive in theory.
- This is a mechanism-based, moderate caution echoed by pharmacy guidance, not a danger documented by case reports.
- Whole beets as food are generally fine; concentrated beetroot juice, powders, and nitrate pre-workouts are the products to keep clear of your sildenafil dose.
- People with low blood pressure, on other blood-pressure medicines, older, or dehydrated should be the most cautious.
- Review any regular beetroot or nitrate supplement with your doctor or pharmacist.