Herb & supplement monograph

Alpha-lipoic Acid 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 Alpha-lipoic Acid interacts with medications. The heart of this page is the interaction list — every drug Alpha-lipoic Acid is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Alpha-lipoic Acid 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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Alpha-lipoic Acid Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, the overall risk of a clinically significant Alpha-lipoic Acid drug interaction appears low for most people. None of the listed interactions are rated major, and even the moderate ones rest on theoretical or lab-based evidence rather than proven effects in people.

Interactions deserving the most attention

The combinations that deserve the most thought involve chemotherapy drugs, since alpha-lipoic acid's antioxidant activity might in theory change how well these treatments work, though experts disagree on this. It may also have mild antiplatelet effects in lab studies, so caution makes sense with blood thinners, where any added bleeding risk matters. Animal research suggests it could reduce the activation of thyroid hormone, another medicine where small changes can count. None of these effects has been confirmed in well-controlled human studies.

What the rest of the list means

A long interaction list does not mean every combination is harmful. Most entries here are theoretical, based on lab or animal findings about how alpha-lipoic acid might behave in the body. Notably, the predicted blood sugar effect with diabetes medications has not produced clinically meaningful changes in larger human studies.

Check your medications against Alpha-lipoic Acid

Based on HelloPharmacist’s Alpha-lipoic Acid interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Alpha-lipoic Acid

263 medications have a known interaction with Alpha-lipoic Acid, graded by severity. Select any drug for the full evidence-based detail.

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

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

AI summaries are generated from our Alpha-lipoic Acid 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 Alpha-lipoic Acid 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 Alpha-lipoic Acid affects

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

All 5 drug categories Alpha-lipoic Acid interacts with

Alkylating AgentsAnticoagulant/antiplatelet DrugsAntitumor AntibioticsThyroid HormoneAntidiabetes Drugs

Alkylating Agents

Theoretically, the antioxidant effects of alpha-lipoic acid might alter the effectiveness of alkylating agents.
The use of antioxidants like alpha-lipoic acid during chemotherapy is controversial. There are concerns that antioxidants could reduce the activity of chemotherapy drugs that generate free radicals. However, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that might interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as alpha-lipoic acid have on chemotherapy. Advise patients to consult their oncologist before using alpha-lipoic acid.

Likelihood Possible Evidence D

Anticoagulant/Antiplatelet Drugs

Theoretically, alpha-lipoic acid may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
In vitro, alpha-lipoic acid inhibits platelet aggregation.

Likelihood Possible Evidence D

Antitumor Antibiotics

Theoretically, the antioxidant effects of alpha-lipoic acid might alter the effectiveness of antitumor antibiotics.
The use of antioxidants like alpha-lipoic acid during chemotherapy is controversial. There are concerns that antioxidants could reduce the activity of antitumor antibiotic drugs, which work by generating free radicals. However, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that might interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as alpha-lipoic acid have on chemotherapy involving antitumor antibiotics. Advise patients to consult their oncologist before using alpha-lipoic acid.

Likelihood Possible Evidence D

Thyroid Hormone

Theoretically, alpha-lipoic acid might decrease the effects of thyroid hormone drugs.
Animal research suggests that co-administration of thyroxine with alpha-lipoic acid reduces conversion into the active T3 form.

Likelihood Possible Evidence D

Antidiabetes Drugs

Theoretically, taking alpha-lipoic acid with antidiabetes drugs might increase the risk of hypoglycemia.
Although some small clinical studies have suggested that alpha-lipoic acid can lower blood glucose levels, larger clinical studies in patients with diabetes have shown no clinically meaningful effect. Additionally, co-administration of single doses of alpha-lipoic acid and glyburide or acarbose did not cause detectable drug interactions in healthy volunteers.

Likelihood Unlikely Evidence B

Monograph

Alpha-lipoic Acid: Uses, Safety & Side Effects

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

The bottom line

Alpha-lipoic acid (ALA) is an antioxidant made naturally by the body and found in small amounts in foods. It is most studied for diabetic nerve pain, where some evidence suggests it may help, but evidence for most other uses is limited. It is generally well tolerated, but talk to your pharmacist or doctor before using it, especially if you have diabetes or thyroid problems.

Part used: Not applicable (a naturally occurring compound, not a plant part)
Common forms: Capsules, tablets, softgels, and injectable forms (used in some countries)

People commonly use it for

Diabetic nerve pain (neuropathy)
Blood sugar support in diabetes
Antioxidant support
Liver health
Skin aging (topical and oral)

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

Safety at a glance

OverallUse caution

Generally well tolerated in most adults, but it can lower blood sugar and is best used under medical guidance.

PregnancyBest avoided

There is not enough reliable safety information, so it is best to avoid during pregnancy.

BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using.

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

Alpha-lipoic acid (ALA), also called thioctic acid, is a compound that your body makes in small amounts. It is found inside cells, where it helps turn food into energy. It is also found in small amounts in foods like spinach, broccoli, potatoes, and red meat.

ALA acts as an antioxidant, which means it may help protect cells from a type of damage caused by unstable molecules called free radicals. Because of this, it is sold as a dietary supplement, usually in capsules or tablets. In some countries it is also given by injection under medical supervision.

People take ALA for many reasons, but it is most often used for nerve pain related to diabetes and for general antioxidant support.

How it works

ALA plays a role in the way your cells produce energy from food. It works alongside enzymes in the parts of cells (mitochondria) that act like tiny power plants.

As an antioxidant, ALA may help neutralize free radicals. It is sometimes described as both water- and fat-soluble, which means it can work in different parts of the cell. It may also help recycle other antioxidants, such as vitamins C and E.

Researchers think these antioxidant effects may help explain its possible benefits for nerve health and blood sugar. Keep in mind that much of this is based on laboratory and animal research, and the way it works in the human body is not fully understood.

Effectiveness

Does Alpha-lipoic Acid work?

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

Evidence overview · 73 uses evaluated

3 Possibly effective 6 Leans ineffective 64 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.

Possibly Effective Diabetic neuropathy