Phosphodiesterase type 5 (PDE5) inhibitors are often the first-line treatment option for erectile dysfunction. Aside from several medications for ED, natural PDE5 inhibitors are also present in some foods.
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ED Treatments: Natural PDE5 Inhibitors
PDE5 Inhibitors: Uses and How They Work
Phosphodiesterase type 5 (PDE5) inhibitors are a type of vasodilating drug for erectile dysfunction treatment. Vasolidating drugs work by expanding the blood vessels due to the relaxation of smooth muscle cells within the vessel walls. Researchers accidentally discovered PDE5 as a side effect of potential use for hypertension and angina.
During an erection, the parasympathetic nervous system becomes activated. This mechanism prompts the brain to release nitric oxide and cyclic GMP. Nitrous oxide and cGMP help relax the muscles and increase blood flow in the penis. However, an enzyme called PDE5 breaks down the cGMP and restrains erection.
PDE5 inhibitors work by blocking the degradative action of cGMP-specific PDE5 on cyclic GMP in the smooth muscle cells lining the blood vessels supplying various tissues.
Some of the common types of PDE5 inhibitors for ED include Sildenafil (Viagra), Tadalafil (Cialis), and Vardenafil (Levitra or Staxyn). Research also suggests that PDE5 inhibitors may help treat diabetes, heart disease, cancer, and potentially cognitive disorders.
RELATED: What Are PDE5 Inhibitors And How Do They Work?
What Are The Natural PDE5 Inhibitors for ED?
PDE5 inhibitors are present in the following foods and herbs:
1. Horny Goat Weed (Epimedium)
Horny goat weed is an herb traditionally used in alternative Chinese medicine for nerve pain, fatigue, atherosclerosis, osteoporosis, hay fever, and ED.
A study in rats has found that horny goat weed extract may be a potential treatment for ED and nerve injuries in humans. Horny goat weed contains the chemical compound icariin, an active component effective as a PDE5 inhibitor.
2. Thai Ginseng (Kaempferia Parviflora Rootstalk)
Thai ginger, also known as black ginger, contains PDE5 inhibitors. Scientific evidence suggests that Thai ginger may significantly increase handgrip strength and enhance sexual erotic stimuli.
Other frequent uses of Thai ginger include:
- Antioxidant
- Improved physical performance
- Improved mitochondrial biogenesis
- Weight management support
- SIRT-1 upregulation
- Aphrodisiac; male sexual dysfunction
- Insulin signaling; blood glucose support
- Cognitive support
- Neuroprotection
- Antiviral/effective vs. influenzas
If you are taking drugs for erectile dysfunction (ED) such as Viagra, Levitra, or Cialis, or medication for high blood pressure or heart disease, it is best not to take Thai ginseng or the other herbs above without talking to a doctor or pharmacist first. Several of these herbs act on blood vessels or heart rate directly: the National Center for Complementary and Integrative Health warns that Yohimbe can raise blood pressure and heart rate and is generally not recommended for people with hypertension or heart disease. Combining a vasodilating supplement with a blood pressure or nitrate medication can push blood pressure lower than either one would alone. Those blood-pressure and heart-rate effects are the clearest flagged concerns among these herbs, but they are not necessarily the only ones, since supplement-drug and supplement-condition interactions are not required to be tested or labeled the way a prescription drug's interactions are. Review your existing health conditions and medications with a physician before starting one of these herbs, which is the reliable way to catch interactions that a product label will not mention.
3. Pomegranate
Pomegranate juice may help with the management of erectile dysfunction.
In a study published by the International Journal of Impotence Research, Wonderful 100% Pomegranate Juice was beneficial to men with mild to moderate ED. Although 47% of the subjects reported improved erections, the researchers believe that more patients and trials are needed to reach statistical significance.
4. Yohimbe
An evergreen tree native to central and western Africa, Yohimbe contains a compound called yohimbine in its bark, said to be one of many natural PDE5 inhibitors. The bark has been used traditionally as an aphrodisiac and to enhance sexual performance and promoted as a treatment for erectile dysfunction. It lacks adequate testing however, in some studies it did appear to have a modest therapeutic benefit over the placebo, particularly in psychogenic erectile disorder.
5. Ashwagandha
Ashwagandha is a root that has been used in Ayurveda medicine for over 3000 years and is commonly referred to as “Indian ginseng”. Ashwagandha is widely claimed to have potent aphrodisiac, rejuvenative, sedative, and life-prolonging properties with vague claims that it can help overall wellness. In studies, some associations with increased levels of testosterone have been found.
Other Potential Natural Treatments
Other alternative therapies thought to help ED include Panax ginseng, Rhodiola Rosea, the herb ashwagandha, and ginkgo Biloba, but more studies are needed to know their safety and efficacy.
Which Natural PDE5 Inhibitor Has the Strongest Evidence?
Pomegranate juice has the most direct human evidence of the group: a placebo-controlled trial published in the International Journal of Impotence Research tested it specifically for erectile dysfunction. Thai ginseng and Yohimbe both have human trial data behind them too, though the Yohimbe trials show only a modest effect over placebo. Ashwagandha's human research covers testosterone changes rather than erectile function directly, and horny goat weed's ED evidence is still limited to a rat study. None of these five has been tested head-to-head against Sildenafil, Tadalafil, or Vardenafil, so having the strongest evidence among natural options is not the same as matching a prescription PDE5 inhibitor.
Which Natural PDE5 Inhibitor Is Safest?
Safety data across all five herbal options is thinner than effectiveness data, as none of them undergoes FDA safety review the way a prescription drug does. Pomegranate juice has the most direct human trial data among the five with no documented interaction warnings, whereas ashwagandha and horny goat weed lack human safety data specific to erectile dysfunction. Yohimbe and Thai ginseng carry the clearest flagged interaction risk, since both are linked to blood pressure and heart-rate effects that can compound with blood pressure or ED medication. Prescription PDE5 inhibitors like Sildenafil, Tadalafil, and Vardenafil carry a layer of oversight that over-the-counter herbs do not, since they require a physician's prescription. We recommend reviewing your complete health profile and current prescriptions with an Opt Health physician before combining any of these herbs with an existing medication.
Do I Need a Doctor's Prescription to Try Natural PDE5 Inhibitors?
No prescription is required for the herbs and foods described above; they are sold over the counter as dietary supplements, unlike Sildenafil (Viagra), Tadalafil (Cialis), and Vardenafil (Levitra or Staxyn), which require one. The FDA does not evaluate dietary supplements for safety or effectiveness before they reach the shelf, the way it does a prescription drug. That gap is a reason to loop in a doctor even without a prescription requirement, since no outside check confirms what is in the product or whether it is safe for a given person.
Is There a Cheaper Way to Treat ED Than Prescription Medication?
The herbs above are typically sold as over-the-counter supplements, which skip the office visit and pharmacy markup that come with a prescription PDE5 inhibitor. Because the FDA does not review these supplements for safety or effectiveness before sale, price differences between brands reflect marketing and dose. They do not reflect proven results. A direct cost comparison against Sildenafil, Tadalafil, or Vardenafil is not meaningful without knowing which option, if any, will actually work for a given case. A physician-guided evaluation and any prescription cost is listed on Opt Health's membership pricing, which is the number that actually applies once a doctor is involved.
Should I Try Natural PDE5 Inhibitors Before Prescription ED Medication?
A physician should make this call because natural PDE5 inhibitors can interact with existing medications and health conditions. A doctor can review what you currently take and confirm whether a natural option, a prescription PDE5 inhibitor, or neither fits your case. Raise the question at a regular checkup or telehealth visit. There is no need to decide alone before speaking with someone. If a natural compound does not produce the results you want, the physician who evaluated that option can pivot your care directly to a prescription PDE5 inhibitor such as Sildenafil, Tadalafil, or Vardenafil. Because we manage your clinical follow-up and monitor your biomarkers over time, you make that transition without having to restart your medical intake elsewhere. Schedule your consultation with an Opt Health physician to review your baseline blood panel and set your treatment plan.
Does Opt Health Discuss Natural PDE5 Inhibitors During a Consultation?
An Opt Health physician reviews your full health picture during the initial consultation, including any supplement or herb you already use, before recommending a treatment plan. We evaluate your symptoms alongside your blood panel, cardiovascular markers, and medical history to identify the underlying drivers of erectile dysfunction. Your physician discusses how those compounds compare and interact with clinical treatments so you can evaluate your options using reliable medical data. Schedule an initial consultation with Opt Health to review your biomarkers and determine the most effective path forward for your goals.
Summary
Natural PDE5 inhibitors are not established as being as effective as prescription options such as Sildenafil (Viagra) or Tadalafil (Cialis), which remain the first-line, more thoroughly studied ED treatment. The herbs above have only small human studies behind them. Pomegranate juice improved erections in 47% of participants in one trial, and Yohimbe showed only a modest benefit over placebo. Combining any of these herbs with a prescription ED medication is not established as safe. Thai ginseng specifically should not be taken alongside Sildenafil (Viagra), Tadalafil (Cialis), or Vardenafil (Levitra) without talking to a doctor or pharmacist first. It is best to consult your doctor before starting any supplementation, especially if a prescription ED medication is already part of the picture.
For a more personalized treatment for ED, feel free to consult us. See our memberships page for current pricing.
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On the supplement most often paired with these, the pooled ashwagandha data reports what the pooled trial data found.
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