Herb & supplement monograph

Apple Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how Apple interacts with medications. The heart of this page is the interaction list — every drug Apple is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Apple 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

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Apple Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, Apple drug interactions can be clinically significant for people taking certain medications, mainly because apple juice can sharply lower the absorption of some drugs. Several interactions are rated major and are backed by well-controlled human studies, and none of the listed interactions are minor.

Interactions deserving the most attention

The best-documented concern involves drugs absorbed through a gut transporter that apple juice blocks. Human studies show apple juice can cut blood levels of fexofenadine (Allegra) by up to 78% and atenolol by more than half, and it reduced levels of aliskiren by about 63%, which could make these medicines much less effective. There is also some human evidence that apple juice may nudge blood pressure and blood sugar upward, which could matter for people whose blood pressure or diabetes medicines are closely adjusted. A single case report suggests apple juice may also lower lithium levels.

What the rest of the list means

Although the overall list of interacting medications is long, most entries trace back to that one absorption mechanism rather than hundreds of separate proven problems. The strongest effects were seen with larger amounts of apple juice, and small servings did not meaningfully change fexofenadine levels, so eating an apple is not the same as drinking large volumes of juice with a dose.

Check your medications against Apple

Based on HelloPharmacist’s Apple interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Apple

300 medications have a known interaction with Apple, graded by severity. Select any drug for the full evidence-based detail.

47 major interactions. These combinations can be clinically significant — best avoided, or used only with close professional supervision. Always check with your pharmacist before combining them with Apple.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Apple using our pharmacist-reviewed interaction data.

AI summaries are generated from our Apple interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

Read The List Like a Pharmacist

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 Apple combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Apple affects

Every type of medication (drug category) Apple is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 7 drug categories Apple interacts with

Organic Anion-transporting Polypeptide Substrates (oatp)Aliskiren (tekturna, Rasilez)Antidiabetes DrugsAntihypertensive DrugsAtenolol (tenormin)Fexofenadine (allegra)Lithium

Organic Anion-Transporting Polypeptide Substrates (Oatp)

Concomitant consumption of apple juice can significantly decrease oral absorption and blood levels of OATP substrates.
Research shows that consuming apple juice inhibits OATP, which reduces bioavailability of oral drugs that are substrates of OATP. Fexofenadine, atenolol, and aliskiren are substrates of OATP. Clinical research shows that coadministration of apple juice decreases bioavailability of fexofenadine by up to 78%, aliskiren by 63%, and atenolol by up to 82%. These effects appear to increase with larger quantities of apple juice. It is thought that apple juice might affect OATP for only a short time. Therefore, separating drug administration and consumption of apple juice by at least 4 hours might avoid this interaction.

Likelihood Likely Evidence B

Aliskiren (Tekturna, Rasilez)

Concomitant consumption of apple juice can significantly decrease oral absorption and blood levels of aliskiren.
Pharmacokinetic research shows that coadministration of apple juice 200 mL along with aliskiren 150 mg decreases the bioavailability of aliskiren by 63%. Apple juice seems to inhibit organic anion transporting polypeptide (OATP), which is involved in drug uptake in the gut, liver, and kidney. It is thought that apple juice might affect OATP for only a short time. Therefore, separating drug administration and consumption of apple juice by at least 4 hours might avoid this interaction.

Likelihood Probable Evidence B

Antidiabetes Drugs

Theoretically, consuming apple juice with antidiabetes drugs might interfere with blood glucose control.
Clinical research suggests that consuming apples or drinking apple juice can raise blood glucose levels, with the effects of drinking apple juice being more significant than consuming apples.

Likelihood Possible Evidence D

Antihypertensive Drugs

Consuming apple juice with antihypertensive drugs might interfere with blood pressure control.
Some clinical evidence suggests that consuming apple and cherry juice can increase blood pressure in elderly patients.

Likelihood Probable Evidence B

Atenolol (Tenormin)

Concomitant consumption of apple juice can significantly decrease oral absorption and blood levels of atenolol.
Pharmacokinetic research shows that coadministration of apple juice 600-1200 mL decreases levels of atenolol by 58% to 82% in a dose-dependent manner. Apple juice seems to inhibit organic anion transporting polypeptide (OATP), which is involved in drug uptake in the gut, liver, and kidney. It is thought that apple juice might affect OATP for only a short time. Therefore, separating drug administration and consumption of apple juice by at least 4 hours might avoid this interaction.

Likelihood Probable Evidence B

Fexofenadine (Allegra)

Concomitant consumption of apple juice can significantly decrease oral absorption and blood levels of fexofenadine.
Pharmacokinetic research shows that coadministration of apple juice 400-1200 mL along with fexofenadine 60-120 mg decreases bioavailability of fexofenadine by up to 78%. Coadministration with smaller quantities of apple juice (150 mL or less) does not appear to affect the bioavailability of fexofenadine. Apple juice seems to inhibit organic anion transporting polypeptide (OATP), which is involved in drug uptake in the gut, liver, and kidney. It is thought that apple juice might affect OATP for only a short time. Therefore, separating drug administration and consumption of apple juice by at least 4 hours might avoid this interaction.

Likelihood Likely Evidence B

Lithium

There is some concern that concomitant consumption of apple juice might decrease oral absorption and blood levels of lithium.
In one case report, a patient had an undetectable serum lithium level when lithium citrate was administered with apple juice. When lithium was administered with an alternative beverage, the lithium level became detectable and the patient demonstrated clinical improvement.

Likelihood Possible Evidence D

Monograph

Apple: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed July 2026 ·

The bottom line

Apples are a nutritious whole food that provides fiber, vitamins, and antioxidant plant compounds, and eating them regularly fits well into a healthy diet. While research suggests apples may support heart and digestive health, most claims about concentrated apple supplements or extracts are not strongly proven, so enjoy apples as food and talk with your pharmacist before using high-dose products.

Scientific name: Malus domestica
Family: Rosaceae
Part used: Fruit (with peel), and sometimes the peel, pectin (fiber), juice, and cider vinegar
Common forms: Fresh fruit, juice, dried fruit, applesauce, apple cider vinegar, pectin supplements, polyphenol extracts

People commonly use it for

General nutrition and fiber intake
Heart and cholesterol health
Blood sugar and weight management
Digestive regularity
Antioxidant support

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance

OverallLikely safe

Apples as a food are safe for most people when eaten in normal amounts.

PregnancyInsufficient reliable information

There is insufficient reliable information available about the safety of apple in amounts greater than those found in foods during pregnancy and lacta...

Read the full pregnancy detail

BreastfeedingInsufficient reliable information

There is insufficient reliable information available about the safety of apple in amounts greater than those found in foods during pregnancy and lacta...

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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Overview

The apple is the fruit of the apple tree (Malus domestica), a member of the rose family. Apple trees are grown all over the world in temperate climates, and the fruit comes in many colors and varieties, from sweet to tart.

Apples are most often eaten fresh, but they are also made into juice, sauce, dried snacks, and cider. In the supplement world, apples are sold as pectin (a type of soluble fiber), polyphenol or antioxidant extracts, and apple cider vinegar. Most of the health interest comes from the fiber, vitamin C, and antioxidant plant compounds found in the fruit and its peel.

How it works

Apples contain several components that may explain their possible health effects. The main ones are fiber (including soluble fiber called pectin), vitamin C, and a group of antioxidant plant compounds called polyphenols, such as quercetin and catechins, which are concentrated in the peel.

Soluble fiber can bind to substances in the gut and may help lower cholesterol absorption and slow the rise of blood sugar after meals. Polyphenols act as antioxidants in laboratory studies, which means they may help reduce cell damage from unstable molecules. Many of these effects have been studied mostly in laboratory and animal research, so they do not automatically prove benefits in people.

Effectiveness

Does Apple work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by Dr. Brian Staiger, PharmD.

Evidence overview · 8 uses evaluated

8 Insufficient evidence

How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.

2Likely EffectiveGood evidence, though not yet conclusive.

3Possibly EffectiveSome evidence suggests a benefit.

4Possibly IneffectiveSome evidence it may not help.

5Likely IneffectiveFairly strong evidence it doesn’t help.

6IneffectiveStrong evidence it doesn’t work.

7Insufficient Reliable Evidence to RateToo little research to say either way.

For Apple, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 8 conditions — evidence insufficient to rate

Insufficient Reliable Evidence To Rate Alzheimer disease