Drug & supplement interaction

Phosphatidylcholine + Etidronate Disodium

Etidronate Disodium brand names: Didronel, Didrocal.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Phosphatidylcholine and Etidronate Disodium 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.

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Interaction report

Phosphatidylcholine and Etidronate Disodium

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 Etidronate Disodium and Phosphatidylcholine 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 Phosphatidylcholine at all — not against Etidronate Disodium, 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.

Phosphatidylcholine safety at a glance

Phosphatidylcholin... overall Use caution Generally well tolerated in food and supplement amounts, but high doses may cause digestive upset.
Pregnancy Use caution Choline is needed in pregnancy, but supplement safety beyond food sources is not well studied; check with your doctor.
Breastfeeding Use caution Not enough reliable data on supplement use while breastfeeding; speak with your healthcare provider first.

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

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

What Phosphatidylcholine Itself Has Been Linked To

This is not an interaction — nothing below involves Etidronate Disodium. It is the side-effect record for Phosphatidylcholine on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Phosphatidylcholine, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • Bleeding or bruising Worth acting on Additional detail

    “When taken orally, phosphatidylcholine may increase sweating and itching. When given subcutaneously, phosphatidylcholine can cause pain, burning, itching, tenderness to touch, bruising, edema, and erythema at the injection site. The pain, itching and erythema usually resolve within 2 days of treatment; however localized tenderness can last longer. Edema and bruising usually resolve within 10 days of treatment.”

    Phosphatidylcholine · Natural Medicines adverse-effect record, reported in erythema.

    6 sources cited
    1. 5229. Aronson PJ, Lorincz AL. Promotion of palmar sweating with oral phosphatidylcholine. Acta Derm Venereol 1985;65:19-24. DOI
    2. 63244. Loguercio C, Andreone P, Brisc C, et al. Silybin combined with phosphatidylcholine and vitamin E in patients with nonalcoholic fatty liver disease: a randomized controlled trial. Free Radic Biol Med 2012;52(9):1658-65. PubMed
    3. 15623. Rittes PG. The use of phosphatidylcholine for correction of lower lid bulging due to prominent fat pads. Dermatol Surg 2001;27:391-2. PubMed
    4. 15624. Rotunda AM, Kolodney MS. Mesotherapy and phosphatidylcholine injections: historical clarification and review. Dermatol Surg 2006;32:465-80. PubMed
    5. 15626. Hasengschwandtner F. Phosphatidylcholine treatment to induce lipolysis. Cosmet Dermatol 2005;4:308-13. PubMed
    6. 15627. Rittes PG. The use of phosphatidylcholine for correction of localized fat deposits. Aesthetic Plast Surg 2003;27:315-8. PubMed
  • A change in taste / Bloating or gas / Diarrhea / Vomiting Additional detail

    “Ingesting large amounts of phosphatidylcholine (30 grams per day) can cause gastrointestinal upset and diarrhea. However, bloating, diarrhea, altered taste, nausea, and vomiting have been reported with smaller doses. Although moderate subcutaneous doses do not usually cause systemic side effects, high doses exceeding 1.2 grams of phosphatidylcholine can cause nausea and abdominal pain in some people.”

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

    6 sources cited
    1. 5223. Domino EF, May WW, Demetriou S, et al. Lack of clinically significant improvement of patients with tardive dyskinesia following phosphatidylcholine therapy. Biol Psychiatry 1985;20:1189-96. PubMed
    2. 63244. Loguercio C, Andreone P, Brisc C, et al. Silybin combined with phosphatidylcholine and vitamin E in patients with nonalcoholic fatty liver disease: a randomized controlled trial. Free Radic Biol Med 2012;52(9):1658-65. PubMed
    3. 68843. Panos, J. M., Palson, R., Johnson, R., Portmann, B., and Williams, R. Polyunsaturated phosphatidylcholine for acute alcoholic hepatitis: a double blind randomized placebo controlled trial. Eur.J.Gastroenterol 1990;2:351-355.
    4. 93389. Stremmel W, Braun A, Hanemann A, Ehehalt R, Autschbach F, Karner M. Delayed release phosphatidylcholine in chronic-active ulcerative colitis: a randomized, double-blinded, dose finding study. J Clin Gastroenterol 2010;44(5):e101-7. PubMed
    5. 93390. Stremmel W, Ehehalt R, Autschbach F, Karner M. Phosphatidylcholine for steroid-refractory chronic ulcerative colitis: a randomized trial. Ann Intern Med. 2007;147(9):603-10. PubMed
    6. 105728. Stremmel W, Vural H, Evliyaoglu O, Weiskirchen R. Delayed Release Phosphatidylcholine is Effective for Treatment of Ulcerative Colitis: A Meta-Analysis. Dig Dis 2021;39(5):508-515. PubMed
  • Sweating / Itching / Swelling Additional detail

    Recorded for Phosphatidylcholine in the same Natural Medicines adverse-effect record shown under Bleeding or bruising above.

  • Stomach upset / Stomach pain Additional detail

    Recorded for Phosphatidylcholine in the same Natural Medicines adverse-effect record shown under A change in taste / Bloating or gas / Diarrhea / Vomiting above.

Showing the 10 most notable of 11 recorded effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

Everything above comes from the Natural Medicines adverse-effect record for Phosphatidylcholine — expand a row for the licensed statement it rests on. We haven’t matched Etidronate Disodium to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Etidronate Disodium.

From our Q&A

Questions About Phosphatidylcholine or Etidronate Disodium

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Phosphatidylcholine or Etidronate Disodium, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Etidronate Disodium

This page covers Phosphatidylcholine only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Etidronate Disodium page lists 23 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Calcium (moderate), Coffee Charcoal (moderate), Dolomite (moderate) and European Mandrake (moderate).

By severity: 1 major · 13 moderate · 9 minor.

From our pharmacist’s overview on the Etidronate Disodium page

“Etidronate disodium (Didronel) is a bisphosphonate prescribed for Paget's disease of bone, a drug already so poorly absorbed that anything blocking its uptake matters, which is why I read this list with genuine caution. Nearly every one of the 23 ingredients on file interferes with absorption in some way.”

Reviewed by 2 · Jul 18, 2026

Open the Etidronate Disodium interaction page

One more smart check

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

We hold 1,521 real supplement products containing Phosphatidylcholine, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Phosphatidylcholine. Even though Phosphatidylcholine itself has no known interaction with Etidronate Disodium, 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 Phosphatidylcholine and Etidronate Disodium 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 Phosphatidylcholine
Top 25%

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

29 days ago today
Medication Etidronate Disodium
Top 25%

#687 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 Phosphatidylcholine reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Phosphatidylcholine and Etidronate Disodium records this page draws on were last updated July 11, 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 Phosphatidylcholine

What is Phosphatidylcholine?

Phosphatidylcholine
  • Liver health
  • Memory and brain support
  • Ulcerative colitis
  • Source of choline
  • High cholesterol

Phosphatidylcholine is a phospholipid that is part of every cell membrane and a source of choline. People take it for liver, brain, and gut health, but solid human evidence is limited for most uses. It is generally well tolerated, but talk to your pharmacist or doctor before starting it.

Phospholipid derived from sources such as soybeans, sunflower, and egg yolk · Capsules, softgels, tablets, granules, liquid, and powder (sometimes as part of lecithin)

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

Phosphatidylcholine: dosing

There is no single official or standardized dose of phosphatidylcholine for supplement use. The amount in products varies widely depending on the source and form, and the studied amounts differ from one condition to another.The best approach is to follow the dosing directions on your specific product's label. Higher doses are more likely to cause stomach upset and other side effects.

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

Read the full Phosphatidylcholine monograph & all interactions
Medication

About Etidronate

What Is Etidronate Used For?

Brand names: Didronel, Didrocal

  • Etidronate is used to treat Paget's disease of bone (a condition in which the bones are soft and weak and may be deformed, painful, or easily broken) and to prevent and treat heterotopic ossification (growth of bone tissue in an area of the body other than the skeleton) in people who have had total hip replacement surgery (surgery to replace the hip joint with an artificial joint) or in people who have had an injury to the spinal cord. Etidronate is in a class of medications called bisphosphonates. It works by slowing the breakdown of old bone and the formation of new bone.

See full Etidronate drug information
Keep checking

Other Drugs & Phosphatidylcholine

Browse every other medication we’ve checked against Phosphatidylcholine — 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
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked Phosphatidylcholine against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Phosphatidylcholine list.

See the full Phosphatidylcholine interactions page
See every supplement checked against Etidronate Disodium, ranked by severity
Evidence & sources

Phosphatidylcholine References

The 15 references that drive our Phosphatidylcholine 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. Domino EF, May WW, Demetriou S, et al. Lack of clinically significant improvement of patients with tardive dyskinesia following phosphatidylcholine therapy. Biol Psychiatry 1985;20:1189-96. PubMed
  2. Aronson PJ, Lorincz AL. Promotion of palmar sweating with oral phosphatidylcholine. Acta Derm Venereol 1985;65:19-24. DOI
  3. Hexsel DM, Serra M, de Oliveira Dal'Forno T, et al. Cosmetic uses of injectable phosphatidylcholine on the face. Otolaryngol Clin North Am 2005;38:1119-29. PubMed
  4. Kopera D, Binder B, Toplak H, et al. Histopathologic changes after intralesional application of phosphatidylcholine for lipoma reduction: report of a case. Am J Dermatopathol 2006;28:331-3. PubMed
  5. Rittes PG. The use of phosphatidylcholine for correction of lower lid bulging due to prominent fat pads. Dermatol Surg 2001;27:391-2. PubMed
  6. Rotunda AM, Kolodney MS. Mesotherapy and phosphatidylcholine injections: historical clarification and review. Dermatol Surg 2006;32:465-80. PubMed
  7. Hexsel D, Serra M, Mazzuco R, et al. Phosphatidylcholine in the treatment of localized fat. J Drugs Dermatol 2003;2:511-8.
  8. Hasengschwandtner F. Phosphatidylcholine treatment to induce lipolysis. Cosmet Dermatol 2005;4:308-13. PubMed
  9. Rittes PG. The use of phosphatidylcholine for correction of localized fat deposits. Aesthetic Plast Surg 2003;27:315-8. PubMed
  10. Ablon G, Rotunda AM. Treatment of lower eyelid fat pads using phosphatidylcholine: clinical trial and review. Dermatol Surg 2004;30:422-7. PubMed
  11. Loguercio C, Andreone P, Brisc C, et al. Silybin combined with phosphatidylcholine and vitamin E in patients with nonalcoholic fatty liver disease: a randomized controlled trial. Free Radic Biol Med 2012;52(9):1658-65. PubMed
  12. Panos, J. M., Palson, R., Johnson, R., Portmann, B., and Williams, R. Polyunsaturated phosphatidylcholine for acute alcoholic hepatitis: a double blind randomized placebo controlled trial. Eur.J.Gastroenterol 1990;2:351-355.
  13. Stremmel W, Braun A, Hanemann A, Ehehalt R, Autschbach F, Karner M. Delayed release phosphatidylcholine in chronic-active ulcerative colitis: a randomized, double-blinded, dose finding study. J Clin Gastroenterol 2010;44(5):e101-7. PubMed
  14. Stremmel W, Ehehalt R, Autschbach F, Karner M. Phosphatidylcholine for steroid-refractory chronic ulcerative colitis: a randomized trial. Ann Intern Med. 2007;147(9):603-10. PubMed
  15. Stremmel W, Vural H, Evliyaoglu O, Weiskirchen R. Delayed Release Phosphatidylcholine is Effective for Treatment of Ulcerative Colitis: A Meta-Analysis. Dig Dis 2021;39(5):508-515. PubMed

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 Phosphatidylcholine and Etidronate Disodium Together: Common Questions

Is it safe to take Phosphatidylcholine with Etidronate Disodium?
We do not list a known interaction between Phosphatidylcholine and Etidronate Disodium. 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.
Does Etidronate Disodium interact with any supplements?
Yes. Etidronate Disodium has documented interactions with 23 supplements in our database — Phosphatidylcholine is not one of them. The Etidronate Disodium interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

Phosphatidylcholine monograph Uses, safety profile, and every drug interaction in one place Etidronate drug information The full plain-English guide to this medication Etidronate Disodium supplement interactions Every supplement checked against Etidronate Disodium, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 15 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Etidronate Disodium and Phosphatidylcholine?

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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.