Drug & supplement interaction

Succinate + Liothyronine

Liothyronine brand name: Cytomel.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Succinate and Liothyronine 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

Succinate and Liothyronine

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 Liothyronine and Succinate 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 Succinate at all — not against Liothyronine, 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.

Succinate safety at a glance

Succinate overall Use caution Succinate occurs naturally in the body and in foods, but supplement safety has not been well studied.
Pregnancy Avoid There is not enough safety data, so it is best to avoid supplemental succinate during pregnancy.
Breastfeeding Avoid Safety while breastfeeding is unknown, so avoiding supplements is the cautious choice.

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

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

What Liothyronine’s Own FDA Label Lists

This is not an interaction — none of it involves Succinate. These are the most notable effects listed in the ADVERSE REACTIONS section of Liothyronine’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 10 of them are worth acting on rather than waiting out — marked below.

  • A change in thyroid levels Worth acting on
  • Bone thinning Worth acting on
  • Muscle weakness Worth acting on
  • A heart attack Worth acting on
  • Heart failure Worth acting on
  • Wheezing Worth acting on
  • Chest pain Worth acting on
  • Shortness of breath Worth acting on
  • A severe allergic reaction Worth acting on
  • Hives Worth acting on

Showing the 10 most notable of 31 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Liothyronine. Read the label on DailyMed › Succinate’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Succinate side to compare — that is a limit of the record, not a statement that Succinate has no side effects.

From our Q&A

Questions About Succinate or Liothyronine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Succinate or Liothyronine, 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 Liothyronine

This page covers Succinate only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Liothyronine page lists 38 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Tiratricol (major), Acetyl-l-carnitine (moderate), Alpha-lipoic Acid (moderate) and Ascophyllum Nodosum (moderate).

By severity: 2 major · 26 moderate · 10 minor.

From our pharmacist’s overview on the Liothyronine page

“Liothyronine (Cytomel) is the active thyroid hormone T3, and it does not tolerate interference well. Of the 38 supplements and herbs on file, 21 act on thyroid function itself, some amplifying the hormone and others blunting it, iodine-rich seaweeds able to swing either way.”

Reviewed by 2 · Jul 18, 2026

Open the Liothyronine interaction page

One more smart check

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

We hold 2 real supplement products containing Succinate, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Succinate. Even though Succinate itself has no known interaction with Liothyronine, 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 Succinate and Liothyronine 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 Succinate
Steady interest

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

29 days ago today
Medication Liothyronine
Top half

#893 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. Succinate is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Succinate reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Succinate and Liothyronine records this page draws on were last updated June 22, 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 Succinate

What is Succinate?

  • Energy and fatigue support
  • Mitochondrial or cellular energy support
  • Hangover relief (traditional/popular use)
  • General wellness and antioxidant support
  • Carrier for minerals (e.g., magnesium succinate)

Succinate (succinic acid) is a natural compound your body already makes as part of how cells produce energy. It is sold as a supplement for energy and fatigue, but solid human evidence for these supplement uses is very limited. If you want to try it, talk to your pharmacist or doctor first, especially if you are pregnant, breastfeeding, or have a health condition.

Not a plant; a naturally occurring organic acid (succinic acid) and its salts · Capsules, tablets, powders; sometimes as mineral succinate salts (such as magnesium succinate) or in combination 'energy' or mitochondrial supplements

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

Succinate: dosing

There is no well-established or standardized dose for succinate supplements. Doses vary widely between products and blends, and there is not enough good human research to recommend a specific amount.The safest approach is to follow the directions on the product label and not exceed them.

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

Read the full Succinate monograph & all interactions
Medication

About Liothyronine

What Is Liothyronine Used For?

Brand name: Cytomel

Liothyronine (available as tablets under the brand names Cytomel, Liomny, and Liothyronine Sodium, and as an injection under Liothyronine Sodium and Triostat) is primarily used to treat hypothyroidism (an underactive thyroid) across all its forms — whether the cause is in the thyroid itself, the pituitary gland, or the hypothalamus, and whether it was present at birth or developed over time.

The oral tablets are also used alongside surgery and radioiodine therapy to suppress TSH (thyroid-stimulating hormone) in people with well-differentiated thyroid cancer, and as a diagnostic agent in thyroid suppression tests. Liothyronine sodium injection is specifically indicated for myxedema coma (a life-threatening form of severe hypothyroidism) and may be used in patients who are allergic to thyroid products derived from pork or beef.

Most-Reported Side Effects for Liothyronine

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.

Headache 885 reports
Fatigue 849 reports
Nausea 585 reports
Dyspnea 559 reports
Hypertension 467 reports
See full Liothyronine drug information
Keep checking

Other Drugs & Succinate

Browse every other medication we’ve checked against Succinate — 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 Succinate 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 Succinate list.

See the full Succinate interactions page
See every supplement checked against Liothyronine, ranked by severity
Evidence & sources

Succinate References

The 3 sources that drive our Succinate monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Succinate is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source
  2. Using Dietary Supplements Wisely — NIH NCCIH Source
  3. Dietary Supplements — MedlinePlus Source

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 Succinate and Liothyronine Together: Common Questions

Is it safe to take Succinate with Liothyronine?
We do not list a known interaction between Succinate and Liothyronine. 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 Liothyronine interact with any supplements?
Yes. Liothyronine has documented interactions with 38 supplements in our database — Succinate is not one of them. The Liothyronine 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

Succinate monograph Uses, safety profile, and every drug interaction in one place Liothyronine drug information The full plain-English guide to this medication Liothyronine supplement interactions Every supplement checked against Liothyronine, 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 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Liothyronine and Succinate?

Our pharmacists answer your medication & supplement questions — free.

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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.