Drug & supplement interaction

Homotaurine + Imiquimod

Imiquimod brand names: Aldara, Zyclara, Vyloma.

No Known Interaction
The bottom line No known interaction

We found no known interaction between Homotaurine and Imiquimod in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Homotaurine and Imiquimod

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Imiquimod and Homotaurine in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

Worth understanding: our licensed dataset holds no drug-interaction record for Homotaurine at all — not against Imiquimod, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Homotaurine safety at a glance

Homotaurine overall Use caution Generally tolerated in studies, but long-term safety as a supplement is not well established.
Pregnancy Avoid There is not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid There is not enough safety information, so it is best avoided while breastfeeding.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Imiquimod and Homotaurine? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests Homotaurine and Imiquimod May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do.

  • Dizziness / Headache Additional detail

    Homotaurine

    “Orally, homotaurine seems to be generally well tolerated. The most frequent side effects reported in clinical trials are nausea, vomiting, diarrhea, dizziness, headache, and sleep disorders.”

    Homotaurine · Natural Medicines adverse-effect record, reported in cluster headache.

    6 sources cited
    1. 17063. Greenberg SM, Rosand J, Schneider AT, et al. A phase 2 study of tramiprosate for cerebral amyloid angiopathy. Alzheimer Dis Assoc Disord 2006;20:269-74. PubMed
    2. 17064. Aisen PS, Saumier D, Briand R, et al. A Phase II study targeting amyloid-beta with 3APS in mild-to-moderate Alzheimer disease. Neurology 2006;67:1757-63.
    3. 17065. Wright TM. Tramiprosate. Drugs Today (Barc) 2006;42:291-8.
    4. 101097. Abushakra S, Porsteinsson A, Scheltens P, et al. Clinical effects of tramiprosate in APOE4/4 homozygous patients with mild Alzheimer's disease suggest disease modification potential. J Prev Alzheimers Dis. 2017;4(3):149-156. PubMed
    5. 101099. Ricciardi L, De Nigris F, Specchia A, Fasano A. Homotaurine in Parkinson's disease. Neurol Sci. 2015;36(9):1581-7. PubMed
    6. 104786. Marino PF, Rossi GCM, Campagna G, et al. Effects of citicoline, homotaurine, and vitamin E on contrast sensitivity and visual-related quality of life in patients with primary open-angle glaucoma: A preliminary study. Molecules. 2020 Nov 29;25(23):5614. PubMed

    “Orally, some of the most frequent side effects of homotaurine are dizziness, headache, and sleep disorders.”

    Homotaurine · Natural Medicines adverse-effect record, reported in cluster headache.

    4 sources cited
    1. 17063. Greenberg SM, Rosand J, Schneider AT, et al. A phase 2 study of tramiprosate for cerebral amyloid angiopathy. Alzheimer Dis Assoc Disord 2006;20:269-74. PubMed
    2. 17064. Aisen PS, Saumier D, Briand R, et al. A Phase II study targeting amyloid-beta with 3APS in mild-to-moderate Alzheimer disease. Neurology 2006;67:1757-63.
    3. 17065. Wright TM. Tramiprosate. Drugs Today (Barc) 2006;42:291-8.
    4. 104786. Marino PF, Rossi GCM, Campagna G, et al. Effects of citicoline, homotaurine, and vitamin E on contrast sensitivity and visual-related quality of life in patients with primary open-angle glaucoma: A preliminary study. Molecules. 2020 Nov 29;25(23):5614. PubMed

    Imiquimod

    Listed in the ADVERSE REACTIONS section of the FDA label for Imiquimod. Read the label on DailyMed ›

  • Diarrhea Additional detail

    Homotaurine

    “Orally, some of the most frequent side effects of homotaurine are nausea, vomiting, and diarrhea. Nausea and vomiting are dose-dependent and the incidence ranges from 5% to 30% with doses of 50-150 mg twice daily. However, in some large studies, nausea and vomiting occurred at a similar rate in the placebo group.”

    Homotaurine · Natural Medicines adverse-effect record, reported in diarrhea.

    6 sources cited
    1. 17063. Greenberg SM, Rosand J, Schneider AT, et al. A phase 2 study of tramiprosate for cerebral amyloid angiopathy. Alzheimer Dis Assoc Disord 2006;20:269-74. PubMed
    2. 17064. Aisen PS, Saumier D, Briand R, et al. A Phase II study targeting amyloid-beta with 3APS in mild-to-moderate Alzheimer disease. Neurology 2006;67:1757-63.
    3. 17065. Wright TM. Tramiprosate. Drugs Today (Barc) 2006;42:291-8.
    4. 101097. Abushakra S, Porsteinsson A, Scheltens P, et al. Clinical effects of tramiprosate in APOE4/4 homozygous patients with mild Alzheimer's disease suggest disease modification potential. J Prev Alzheimers Dis. 2017;4(3):149-156. PubMed
    5. 101099. Ricciardi L, De Nigris F, Specchia A, Fasano A. Homotaurine in Parkinson's disease. Neurol Sci. 2015;36(9):1581-7. PubMed
    6. 104786. Marino PF, Rossi GCM, Campagna G, et al. Effects of citicoline, homotaurine, and vitamin E on contrast sensitivity and visual-related quality of life in patients with primary open-angle glaucoma: A preliminary study. Molecules. 2020 Nov 29;25(23):5614. PubMed

    Imiquimod

    Listed in the ADVERSE REACTIONS section of the FDA label for Imiquimod. Read the label on DailyMed ›

Reported for Homotaurine but not commonly for Imiquimod: vomiting and nausea.

Effects for Imiquimod come from the ADVERSE REACTIONS section of its FDA label; effects for Homotaurine come from the Natural Medicines adverse-effect record, quoted above. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Everything else you take

See Every Supplement That Interacts With Imiquimod

This page covers Homotaurine only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Imiquimod page lists 3 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Dimethylsulfoxide (dmso) (moderate), Turpentine Oil (moderate) and Alchemilla (minor).

By severity: 2 moderate · 1 minor.

From our pharmacist’s overview on the Imiquimod page

“Imiquimod (Aldara, Zyclara, Vyloma) is a cream for warts, precancerous spots, and certain skin cancers, and its supplement list is short and workable for most people. Only 3 ingredients are on file, none rated major, and all involve products applied to the skin rather than swallowed.”

Reviewed by 2 · Jul 18, 2026

Open the Imiquimod interaction page

One more smart check

Taking Homotaurine as Part of a Dietary Supplement Product? Check It for Interactions

We hold 2 real supplement products containing Homotaurine, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Homotaurine. Even though Homotaurine itself has no known interaction with Imiquimod, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Homotaurine and Imiquimod Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Homotaurine
Steady interest

#1,249 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Imiquimod
Top half

#1,098 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Homotaurine reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Homotaurine and Imiquimod records this page draws on were last updated July 10, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Homotaurine

What is Homotaurine?

  • Memory support
  • Brain and cognitive health
  • Alzheimer's disease (investigational)
  • General neuroprotection

Homotaurine (also called tramiprosate) is a small amino acid-like molecule studied mainly for slowing memory loss and Alzheimer's disease. Large clinical trials did not clearly prove it works, and it is now sold as a dietary supplement rather than an approved drug. Talk to your pharmacist or doctor before using it, especially if you have a medical condition.

Synthesized compound (also found naturally in some seaweeds) · Capsules, tablets

An interaction check asks whether these two react with each other — it does not ask whether Homotaurine is a good idea for someone in your situation. Here is what our Homotaurine record says about it on its own.

Homotaurine: dosing

There is no officially established supplement dose for homotaurine. Doses used in research were chosen for studying Alzheimer's disease and may not match what is sold in stores.If you choose to use a homotaurine product, follow the directions on the label and do not exceed the recommended amount.

From our Homotaurine monograph — the full record covers uses, side effects and every documented interaction.

Read the full Homotaurine monograph & all interactions
Medication

About Imiquimod Topical

What Is Imiquimod Topical Used For?

Brand names: Aldara, Zyclara, Vyloma

Imiquimod cream is used to treat three skin conditions in adults: actinic keratoses (rough, scaly patches on the skin caused by sun damage) on the face or scalp; superficial basal cell carcinoma (a type of skin cancer) on the trunk, neck, or limbs when surgery is not the best option; and external genital and perianal warts (condyloma acuminata) in patients 12 years and older.

It is not effective for molluscum contagiosum in children ages 2–12, and it has not been proven safe or effective in people with weakened immune systems. It should not be used for warts inside the urethra, vagina, cervix, rectum, or anal canal.

Most-Reported Side Effects for Imiquimod

From FAERS, the FDA’s public side-effect reporting system (0 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Erythema 183 reports
Fatigue 179 reports
Nausea 114 reports
Influenza like illness 102 reports
Application site erythema 100 reports
See full Imiquimod Topical drug information
Keep checking

Other Drugs & Homotaurine

Browse every other medication we’ve checked against Homotaurine — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
No interaction 2,829 drugs checked — show the list
Evidence & sources

Homotaurine References

The 15 references that drive our Homotaurine 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.

  1. Aisen PS, Gauthier S, Vellas B, et al. Alzhemed: a potential treatment for Alzheimer's disease. Curr Alzheimer Res 2007;4:473-8.
  2. Greenberg SM, Rosand J, Schneider AT, et al. A phase 2 study of tramiprosate for cerebral amyloid angiopathy. Alzheimer Dis Assoc Disord 2006;20:269-74. PubMed
  3. Aisen PS, Saumier D, Briand R, et al. A Phase II study targeting amyloid-beta with 3APS in mild-to-moderate Alzheimer disease. Neurology 2006;67:1757-63.
  4. Wright TM. Tramiprosate. Drugs Today (Barc) 2006;42:291-8.
  5. Wong GT. FDA deems US Alzhemed trial results inconclusive. Alzheimer Research Forum. August 28, 2007. Available at: www.alzforum.org/new/detail.asp?id=1647. (Accessed 26 May 2009).
  6. McCaffrey P, Strobel G. Philadelphia: European trial of Alzhemed ends, marketing morphs to supplement. Alzheimer Research Forum. November 19, 2007. Available at: www.alzforum.org/new/detail.asp?id=1691. (Accessed 26 May 2009).
  7. Bossú P, Salani F, Ciaramella A, et al. Anti-inflammatory effects of homotaurine in patients with amnestic mild cognitive impairment. Front Aging Neurosci. 2018;10:285. PubMed
  8. Abushakra S, Porsteinsson A, Scheltens P, et al. Clinical effects of tramiprosate in APOE4/4 homozygous patients with mild Alzheimer's disease suggest disease modification potential. J Prev Alzheimers Dis. 2017;4(3):149-156. PubMed
  9. Spalletta G, Cravello L, Gianni W, et al. Homotaurine effects on hippocampal volume loss and episodic memory in amnestic mild cognitive impairment. J Alzheimers Dis. 2016;50(3):807-16. PubMed
  10. Ricciardi L, De Nigris F, Specchia A, Fasano A. Homotaurine in Parkinson's disease. Neurol Sci. 2015;36(9):1581-7. PubMed
  11. Gauthier S, Aisen PS, Ferris SH, et al. Effect of tramiprosate in patients with mild-to-moderate Alzheimer's disease: exploratory analyses of the MRI sub-group of the Alphase study. J Nutr Health Aging. 2009;13(6):550-7. PubMed
  12. Aisen PS, Gauthier S, Ferris SH, et al. Tramiprosate in mild-to-moderate Alzheimer's disease - a randomized, double-blind, placebo-controlled, multi-centre study (the Alphase Study). Arch Med Sci. 2011;7(1):102-11. PubMed
  13. Marino PF, Rossi GCM, Campagna G, et al. Effects of citicoline, homotaurine, and vitamin E on contrast sensitivity and visual-related quality of life in patients with primary open-angle glaucoma: A preliminary study. Molecules. 2020 Nov 29;25(23):5614. PubMed
  14. Toppi E, Sireno L, Lembo M, et al. IL-33 and IL-10 Serum Levels Increase in MCI Patients Following Homotaurine Treatment. Front Immunol 2022;13:813951. PubMed
  15. Rossi GCM, Rolle T, De Silvestri A, et al. Multicenter, Prospective, Randomized, Single Blind, Cross-Over Study on the Effect of a Fixed Combination of Citicoline 500 mg Plus Homotaurine 50 mg on Pattern Electroretinogram (PERG) in Patients With Open Angl

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Homotaurine and Imiquimod Together: Common Questions

Is it safe to take Homotaurine with Imiquimod?
We do not list a known interaction between Homotaurine and Imiquimod. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Do Homotaurine and Imiquimod have any of the same side effects?
Yes — our sources link each of them separately to 3 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
Does Imiquimod interact with any supplements?
Yes. Imiquimod has documented interactions with 3 supplements in our database — Homotaurine is not one of them. The Imiquimod interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Still Have a Question About Imiquimod and Homotaurine?

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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.