African Wild Potato Drug Interactions, Uses, Effectiveness, Safety & More
What is this page for?
First and foremost: how African Wild Potato interacts with medications. The heart of this page is the interaction list — every drug African Wild Potato is known to interact with, and how serious each one is.
But these pages have grown well beyond that into a full monograph — what African Wild Potato is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy
Check African Wild Potato against your medication
Add one medicationAfrican Wild Potato Drug Interactions: The Bottom Line
From the HelloPharmacist Editorial Team · Updated July 2026Based on the available evidence, the overall risk of a clinically significant African Wild Potato drug interaction appears low for most people, since nearly every listed interaction is theoretical rather than confirmed in humans. None of the interactions are rated major, all carry a moderate rating, and each rests on lab or animal research rather than human studies.
The pairing most worth watching is with diabetes medications, because animal research suggests African Wild Potato may lower blood sugar, and an added drop could matter for someone whose glucose is tightly managed. The HIV drug indinavir also stands out, as lab and animal work suggest the herb could raise its levels in the body. Beyond these, nothing else rises above the general theoretical concern.
The long list of medications reflects lab findings that African Wild Potato may slow the enzymes and transport proteins the body uses to clear many drugs, not proof that each combination is harmful. Notably, in one human study the herb did not change how the body handled efavirenz, a drug cleared by one of those enzymes, suggesting some predicted effects may not play out in people.
Based on HelloPharmacist’s African Wild Potato interaction data and reviewed under our editorial standards.
Drugs that interact with African Wild Potato
1007 medications have a known interaction with African Wild Potato, graded by severity. Select any drug for the full evidence-based detail.
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Tell us the medications you take and we’ll check each one against African Wild Potato using our pharmacist-reviewed interaction data.
AI summaries are generated from our African Wild Potato interaction data for education only — always confirm with your pharmacist. How we use AI
No drugs match “”.
What Severity, Likelihood & Evidence Mean
Severity — How Serious It Can Be
- Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
- Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
- Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
- No known interaction. Checked against our sources with nothing documented — not the same as proven safety.
Likelihood — How Well It’s Documented
- Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
- Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
- Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
- Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Where This Data Comes From
- Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
- Each drug listed above links to the full report for that exact African Wild Potato combination — clinical detail, likelihood, evidence level, and citations.
- Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
The kinds of drugs African Wild Potato affects
Every type of medication (drug category) African Wild Potato is known to interact with. Open any category for the detail — or search your exact drug in the checker above.
Antidiabetes Drugs
Evidence from animal research suggests that African wild potato lowers blood glucose levels. So far, this effect has not been shown in humans. Theoretically, concomitant use of African wild potato and antidiabetes drugs might increase the risk of hypoglycemia. Dose adjustments might be necessary. Some antidiabetes drugs include glimepiride (Amaryl), glyburide (DiaBeta, Glynase PresTab, Micronase), insulin, pioglitazone (Actos), rosiglitazone (Avandia), and others.
Cytochrome P450 1A2 (Cyp1A2) Substrates
In vitro research shows that African wild potato extract inhibits cytochrome P450 1A2 (CYP1A2). However, this effect has yet to be reported in humans. Until more is known, use with caution. Theoretically, concomitant use of African wild potato with CYP1A2 substrates might increase the risk for adverse effects from these substrates. Some of these drugs include amitriptyline (Elavil), haloperidol (Haldol), ondansetron (Zofran), propranolol (Inderal), theophylline (Theo-Dur, others), verapamil (Calan, Isoptin, others), and others.
Cytochrome P450 2B6 (Cyp2B6) Substrates
In vitro research shows that African wild potato extract inhibits cytochrome P450 2B6 (CYP2B6). However, this effect has yet to be reported in humans. Until more is known, use with caution. Theoretically, concomitant use of African wild potato with CYP2B6 substrates might increase the risk for adverse effects from these substrates. Some of these drugs include ketamine (Ketalar), phenobarbital, orphenadrine (Norflex), secobarbital (Seconal), and dexamethasone (Decadron).
Cytochrome P450 2C8 (Cyp2C8) Substrates
In vitro research shows that African wild potato extract might inhibit cytochrome P450 2C8 (CYP2C8). However, this effect has yet to be reported in humans. Until more is known, use with caution. Theoretically, concomitant use of African wild potato with CYP2C8 substrates might increase the risk for adverse effects from these substrates. Some drugs metabolized by CYP2C8 include amiodarone (Cordarone), paclitaxel (Taxol); nonsteroidal anti-inflammatory drugs (NSAIDs) such as diclofenac (Cataflam, Voltaren) and ibuprofen (Motrin); rosiglitazone (Avandia); and others.
Cytochrome P450 2C9 (Cyp2C9) Substrates
In vitro research shows that African wild potato extract inhibits cytochrome P450 2C9 (CYP2C9). However, this effect has yet to be reported in humans. Until more is known, use with caution. Theoretically, concomitant use of African wild potato with CYP2C9 substrates might increase the risk for adverse effects from these substrates. Some of these drugs include nonsteroidal anti-inflammatory drugs (NSAIDs) such as diclofenac (Cataflam, Voltaren), ibuprofen (Motrin), meloxicam (Mobic), and piroxicam (Feldene); celecoxib (Celebrex); amitriptyline (Elavil); warfarin (Coumadin); glipizide (Glucotrol); losartan (Cozaar); and others.
Cytochrome P450 3A4 (Cyp3A4) Substrates
In vitro evidence shows that African wild potato extract can inhibit cytochrome P450 3A4 (CYP3A4) enzyme activity by up to 86%. Theoretically, African wild potato might increase levels of drugs metabolized by CYP3A4. However, in human research, African wild potato does not seem to affect the pharmacokinetics of Efavirenz, a CYP3A4 substrate. Until more is known, use African wild potato cautiously or avoid in patients taking drugs metabolized by CYP3A4. Some drugs metabolized by CYP3A4 include lovastatin (Mevacor), ketoconazole (Nizoral), itraconazole (Sporanox), fexofenadine (Allegra), triazolam (Halcion), and numerous others.
Indinavir (Crixivan)
In vitro and animal research show that African wild potato can cause pharmacokinetic interactions that might lead to elevated serum levels of indinavir. While the exact mechanism of interaction is unknown, it is thought to be due to the inhibition of cytochrome P450 3A4 (CYP3A4) by African wild potato. Theoretically, concomitant use of African wild potato with indinavir might increase the effects and adverse effects of indinavir.
Organic Anion Transporter 1 (Oat1) Substrates
In vitro research shows that African wild potato extract inhibits OAT1. This drug transport protein is involved in renal tubular uptake of some drugs from the blood and then elimination in the urine. Inhibition of this transporter decreases renal elimination and increases drug levels in the body. The clinical significance of this in humans is not known.
Some substrates of OAT1 include acyclovir (Zovirax), adefovir (Hepsera), cephalosporins, cidofovir (Vistide), cimetidine (Tagamet), ciprofloxacin (Cipro), furosemide (Lasix), hydrochlorothiazide (HCTZ), NSAIDs, oseltamivir (Tamiflu), pravastatin (Pravachol), probenecid, simvastatin (Zocor), and zidovudine (Retrovir).
Organic Anion Transporter 3 (Oat3) Substrates
In vitro evidence shows that African wild potato extract inhibits OAT3. This drug transport protein is involved in renal tubular uptake of some drugs from the blood and then elimination in the urine. Inhibition of this transporter decreases renal elimination and increases drug levels in the body. The clinical significance of this in humans is not known.
Some substrates of OAT3 include cephalosporins, famotidine (Pepcid), furosemide (Lasix), hydrochlorothiazide (HCTZ), methotrexate, NSAIDs, probenecid, ranitidine (Zantac).
African Wild Potato: Uses, Safety & Side Effects
African Wild Potato (Hypoxis hemerocallidea) is a southern African plant traditionally used as a tonic and for immune, prostate, and inflammatory complaints. Human evidence for these uses is very limited, and safety—especially during pregnancy, breastfeeding, or with serious illness—is not well established. Talk to a pharmacist or doctor before using it.
- Scientific name
- Hypoxis hemerocallidea
- Family
- Hypoxidaceae
- Part used
- Corm (underground tuber/rootstock)
- Common forms
- Capsules, tablets, tinctures, dried corm extracts, traditional decoctions
- Immune support
- Prostate and urinary symptoms
- Inflammation
- General tonic/wellness
- Skin conditions
Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.
Limited human safety data and unclear effective doses mean it should be used cautiously.
Insufficient reliable information available; avoid using.
Read the full pregnancy detailInsufficient reliable information available; avoid using.
Read the full breastfeeding detailPregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Overview
African Wild Potato comes from the plant Hypoxis hemerocallidea, which grows naturally in grasslands across southern Africa. Despite its name, it is not a true potato. The part most often used is the underground corm (a swollen, tuber-like rootstock).
It has a long history in traditional southern African medicine, where it is taken as a general tonic and used for a range of complaints. Today it is sold as capsules, tablets, tinctures, and dried extracts. Some products are marketed for immune support and prostate health.
How it works
The plant contains a compound called hypoxoside, which the body can convert into a substance called rooperol. In laboratory studies, rooperol has shown antioxidant, anti-inflammatory, and possible anti-cancer activity, and the corm also contains plant sterols (phytosterols) that may affect inflammation and the immune system.
It is important to understand that these mechanisms are mostly based on test-tube and animal research. What happens in a lab dish does not always translate to real benefits in the human body, and the amounts used in research may differ from what is in commercial products.
Does African Wild Potato work?
How to read these evidence grades
Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.
Possibly Effective Benign prostatic hyperplasia (BPH)
Clinical trials in patients with BPH show that taking beta-sitosterol (Harzol, Azuprostat), extracted from African wild potato, 60-130 mg in divided doses daily, either alone or in combination with other beta-sitosterol sources, for 6-18 months seems to reduce urinary symptoms, improve urine flow, and improve quality of life when compared with placebo. The effect of whole African wild potato is unclear.
Also studied for 1 condition — evidence insufficient to rate
Insufficient Reliable Evidence To Rate Lung cancer
A very small clinical study in patients with lung cancer shows that taking hypoxoside, a constituent of African wild potato extract, does not seem to prolong survival when compared with historical control. The validity of these findings is limited by the small study size and lack of a control group.
Source & disclaimer. Effectiveness ratings and evidence summaries are provided by Natural Medicines (Therapeutic Research Center) and shown as licensed. Where Natural Medicines hasn’t rated a use, HelloPharmacist’s pharmacists may add their own reviewed rating and evidence (each such entry is labeled). This is educational information, not medical advice — talk with your pharmacist or doctor before starting, stopping, or changing a supplement.
Safety & precautions
There is not enough reliable human data to call African Wild Potato clearly safe. Because some of its compounds may affect the immune system and inflammation, people with autoimmune conditions or those taking medicines that suppress the immune system should be especially cautious.
There have been concerns that, in some people or at higher doses, it could affect blood cells or the body in ways that are not fully understood. People with serious medical conditions—such as cancer, HIV, kidney, or liver problems—should not use it in place of proven treatment and should speak with their doctor first.
For pregnancy and breastfeeding, there is no dependable safety information. Because of this uncertainty, it is best to avoid it during these times. Always tell your pharmacist or doctor about any supplement you take.
Side effects
Reported side effects are not well documented because formal human studies are limited. As with many herbal products, possible effects include stomach upset, nausea, or digestive discomfort.
More serious concerns have been raised about possible effects on blood cells and the immune system, though these are not fully confirmed in people. Stop using it and seek medical care if you notice an allergic reaction (such as rash, swelling, or trouble breathing) or any unusual symptoms.
African Wild Potato: Reported Adverse Effects
Documented safety reports on African Wild Potato from the evidence-graded Natural Medicines (TRC Healthcare) database, shown word-for-word from the licensed record.
There is limited information available about the adverse effects of African wild potato. Some studies have evaluated constituents isolated from African wild potato, including beta-sitosterol and hypoxoside. Side effects reported with beta-sitosterol include nausea, indigestion, gas, diarrhea, constipation, erectile dysfunction, and loss of libido. Side effects reported with hypoxoside include anxiety, nausea, vomiting, and diarrhea.
- Berges RR, Windeler J, Trampisch HJ, et al. Randomised, placebo-controlled, double-blind clinical trial of beta-sitosterol in patients with benign prostatic hyperplasia. Beta-sitosterol Study Group. Lancet 1995;345:1529-32.
- Klippel KF, Hiltl DM, Schipp B. A multicentric, placebo-controlled, double-blind clinical trial of beta-sitosterol (phytosterol) for the treatment of benign prostatic hyperplasia. Br J Urol 1997;80:427-32.
- Berges RR, Windeler J, Trampisch HJ, et al. Randomized, placebo-controlled, double-blind clinical trial of beta-sitosterol in patients with benign prostatic hyperplasia. Lancet 1995;345:1529-32.
- Smit BJ, Albrecht CF, Liebenberg RW, et al A phase I trial of hypoxoside as an oral prodrug for cancer therapy--absence of toxicity. S Afr Med J 1995;85:865-70.
Anxiety Neurologic/CNS
Orally, hypoxoside, an African wild potato constituent, has been reported to cause anxiety in one small, uncontrolled study.
Constipation Gastrointestinal
Orally, specific beta-sitosterol extracts from African wild potato (Azuprostat, Harzol) can cause nausea, indigestion, gas, diarrhea, or constipation. Hypoxoside, an African wild potato constituent, has been reported to cause nausea, vomiting, and diarrhea in one small, uncontrolled study.
- Berges RR, Windeler J, Trampisch HJ, et al. Randomised, placebo-controlled, double-blind clinical trial of beta-sitosterol in patients with benign prostatic hyperplasia. Beta-sitosterol Study Group. Lancet 1995;345:1529-32.
- Klippel KF, Hiltl DM, Schipp B. A multicentric, placebo-controlled, double-blind clinical trial of beta-sitosterol (phytosterol) for the treatment of benign prostatic hyperplasia. Br J Urol 1997;80:427-32.
- Smit BJ, Albrecht CF, Liebenberg RW, et al A phase I trial of hypoxoside as an oral prodrug for cancer therapy--absence of toxicity. S Afr Med J 1995;85:865-70.
Erectile dysfunction (ED) Genitourinary
Orally, the beta-sitosterol constituent of African wild potato has been reported to cause erectile dysfunction and loss of libido.
Adverse-effects data: Natural Medicines, Therapeutic Research Center
Dosing
There is no well-established, standardized dose for African Wild Potato. Products vary widely in strength and in how they are prepared, so it is hard to compare one to another.
If you choose to use it, follow the directions on the product label and do not exceed them. A pharmacist can help you review a specific product, check for quality concerns, and make sure it is appropriate for you. Choose products from reputable manufacturers, since supplement quality is not tightly regulated.
African Wild Potato & Pregnancy
African Wild Potato & Breastfeeding
© 2026 Therapeutic Research Center
Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center
References & further reading
The 10 references that drive our African Wild Potato 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.
- Berges RR, Windeler J, Trampisch HJ, et al. Randomised, placebo-controlled, double-blind clinical trial of beta-sitosterol in patients with benign prostatic hyperplasia. Beta-sitosterol Study Group. Lancet 1995;345:1529-32.
- Klippel KF, Hiltl DM, Schipp B. A multicentric, placebo-controlled, double-blind clinical trial of beta-sitosterol (phytosterol) for the treatment of benign prostatic hyperplasia. Br J Urol 1997;80:427-32.
- Berges RR, Windeler J, Trampisch HJ, et al. Randomized, placebo-controlled, double-blind clinical trial of beta-sitosterol in patients with benign prostatic hyperplasia. Lancet 1995;345:1529-32.
- Berges RR, Kassen A, Senge T. Treatment of symptomatic benign prostatic hyperplasia with beta-sitosterol: an 18-month follow-up. BJU Int 2000;85:842-6.
- Mahomed IM, Ojewole JA. Hypoglycemic effect of Hypoxis hemerocallidea corm (African potato) aqueous extract in rats. Methods Find Exp Clin Pharmacol 2003;25:617-23. PubMed
- Smit BJ, Albrecht CF, Liebenberg RW, et al A phase I trial of hypoxoside as an oral prodrug for cancer therapy--absence of toxicity. S Afr Med J 1995;85:865-70.
- Wilt TJ, Ishani A, Rutks I, et al. Phytotherapy for benign prostatic hyperplasia. Public Health Nutr 2000;3(4A):459-472. PubMed
- Jalloh MA, Gregory PJ, Hein D, et al. Dietary supplement interactions with antiretrovirals: a systematic review. Int J STD AIDS. 2017 Jan;28(1):4-15. PubMed
- Fasinu PS, Gutmann H, Schiller H, Bouic PJ, Rosenkranz B. The potential of Hypoxis hemerocallidea for herb-drug interaction. Pharm Biol. 2013 Dec;51(12):1499-507.
- Havenga K, Abay E, Wiesner L, Viljoen A, Steyn D, Hamman J. The in vitro and in vivo effects of Hypoxis hemerocallidea on indinavir pharmacokinetics: modulation of efflux. Planta Med. 2018;84(12-13):895-901. PubMed
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.
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC
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African Wild Potato: Common Questions
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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