Drug & supplement interaction

Theacrine + Cefaclor

Cefaclor brand names: Ceclor CD, Ceclor.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Oct 4, 2026
The bottom line No known interaction

We found no known interaction between Theacrine and Cefaclor 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 label for Cefaclor states a food rule worth keeping to.

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Interaction report

Theacrine and Cefaclor

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 Cefaclor and Theacrine 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.

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.

Theacrine safety at a glance

Theacrine overall Use caution Short-term use appears generally well tolerated in studies, but long-term safety is not well established.
Pregnancy Avoid Not enough safety data, so avoid use during pregnancy.
Breastfeeding Avoid Not enough safety data, so avoid use while breastfeeding.

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

Still wondering about combining Cefaclor and Theacrine? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Cefaclor

Interactions in our licensed database are recorded against drug classes, not just single drug names. Cefaclor is filed under 6 classifications — including organic anion transporter 3 (oat3) substrates, organic anion transporter 1 (oat1) substrates, antibiotic drugs. Theacrine has documented interactions with 1 drug class — the most serious being cns depressants (moderate) — and none of Cefaclor’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Theacrine Does Interact With Other Medications

Theacrine has 248 moderate known drug interactions in our database — Cefaclor isn’t one of them. If you take anything else, check it against the full list below.

Moderate 248 No known interaction 2,582 (incl. Cefaclor)
Taking anything else?

Check Another of Your Medications Against Theacrine

Covers the 2,830 medications we’ve checked against Theacrine. Pick one to open its full report.

What to actually watch for

What Cefaclor’s Own FDA Label Lists

This is not an interaction — none of it involves Theacrine. These are the most notable effects listed in the ADVERSE REACTIONS section of Cefaclor’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.

  • Pain or burning when passing urine Worth acting on
  • Heart failure Worth acting on
  • Fainting Worth acting on
  • Wheezing Worth acting on
  • Confusion Worth acting on
  • A severe skin reaction Worth acting on
  • Chest pain Worth acting on
  • A low platelet count Worth acting on
  • Kidney problems Worth acting on
  • Anemia Worth acting on

Showing the 10 most notable of 46 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 Cefaclor. Read the label on DailyMed › Theacrine’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Theacrine side to compare — that is a limit of the record, not a statement that Theacrine has no side effects.

How to take them

Some Cefaclor Products Have a Food Rule — Theacrine Should Not Break It

At least one FDA label for a product containing Cefaclor says to take it with food. If you take Theacrine on an empty stomach out of habit, keep them separate — and take Cefaclor with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Cefaclor products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

DOSAGE AND ADMINISTRATION The absorption of cefaclor extended-release tablets is enhanced when it is administered with food.

From the Dosage and Administration section of the FDA label we read for Cefaclor — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With Cefaclor

This page covers Theacrine only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Cefaclor page lists 60 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Asarabacca (major), Siberian Cocklebur (major), African Wild Potato (moderate) and Aristolochia (moderate).

By severity: 3 major · 46 moderate · 11 minor.

From our pharmacist’s overview on the Cefaclor page

“The entries worth understanding before any others on this cefaclor (Ceclor) page are the kidney risks and charcoal. Cefaclor is a cephalosporin antibiotic, typically a short course for ear, sinus, throat, or skin infections, and two herbs here, Siberian cocklebur and asarabacca, can damage the kidneys on their own, so pairing either wi…”

Reviewed by 2 · Jul 18, 2026

Open the Cefaclor interaction page

One more smart check

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

We hold 501 real supplement products containing Theacrine, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Theacrine. Even though Theacrine itself has no known interaction with Cefaclor, 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 Theacrine and Cefaclor 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 Theacrine
Top 25%

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

29 days ago today
Medication Cefaclor
Top 10%

#260 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 Theacrine reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified October 4, 2026. The Theacrine and Cefaclor records this page draws on were last updated June 20, 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 Theacrine

What is Theacrine?

  • Energy and reduced fatigue
  • Focus and mental alertness
  • Mood support
  • Pre-workout performance
  • Caffeine-like stimulation with possibly less tolerance

Theacrine is a caffeine-like compound found naturally in certain tea plants and is sold in supplements for energy, focus, and mood. Early human studies suggest it may give a stimulant-like boost, but the overall evidence is limited and long-term safety is not well known. Talk with your pharmacist or doctor before using it, especially if you are sensitive to stimulants or have heart problems.

Leaves (and a synthetic version is also made) · Capsules, tablets, powders (often in pre-workout and energy blends)

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

Theacrine: dosing

There is no officially established or standardized dose for theacrine. Amounts used in supplements vary, and it is often combined with caffeine and other ingredients in blends.The safest approach is to follow the directions on the product label and not exceed the recommended amount. Avoid taking it close to bedtime so it does not interfere with sleep.

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

Read the full Theacrine monograph & all interactions
Medication

About Cefaclor

What Is Cefaclor Used For?

Brand names: Ceclor CD, Ceclor

Cefaclor treats a range of bacterial infections. The capsule and oral suspension forms are used for ear infections (otitis media), lower respiratory tract infections including pneumonia, strep throat and tonsillitis, urinary tract infections (including kidney infections and bladder infections), and skin and skin structure infections.

The extended-release tablet form of Cefaclor is approved for a narrower set of uses: acute bacterial flare-ups of chronic bronchitis, strep throat and tonsillitis, and uncomplicated skin infections. Not all infections approved for the capsule or suspension are approved for the extended-release tablet — your prescriber will choose the right form for your infection.

Most-Reported Side Effects for Cefaclor

From FAERS, the FDA’s public side-effect reporting system (1,535 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Drug hypersensitivity 252 reports
Nausea 159 reports
Vomiting 159 reports
Fatigue 137 reports
Fever 121 reports
See full Cefaclor drug information
Keep checking

Other Drugs & Theacrine

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

0Major
248Moderate
0Minor
2,581No known interaction
248 Moderate 2,581 No interaction
Moderate

248 interactions

Showing 60 of 248 moderate interactions — see all 248 on the Theacrine page.

No interaction 2,581 drugs checked — show the list

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

Showing the 60 most looked-up of 2,581 medications checked with no known interaction — see the full Theacrine list.

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

Theacrine References

The 1 references that drive our Theacrine 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. Xu JK, Kurihara H, Zhao L, Yao XS. Theacrine, a special purine alkaloid with sedative and hypnotic properties from Cammelia assamica var. kucha in mice. J Asian Nat Prod Res 2007;9(6-8):665-72.

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 Theacrine and Cefaclor Together: Common Questions

Is it safe to take Theacrine with Cefaclor?
We do not list a known interaction between Theacrine and Cefaclor. 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.
Should I take Theacrine and Cefaclor at the same time of day?
At least one FDA label for a product containing Cefaclor says to take it with food. If you take Theacrine on an empty stomach out of habit, keep them separate and take Cefaclor with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Cefaclor products can differ — so check the directions on your own box. This is about absorption, not an interaction.
How was the Theacrine and Cefaclor combination checked?
Interactions in our licensed database are recorded against drug classes. Cefaclor is filed under 6 classifications, and Theacrine has documented interactions with 1 drug class — none of Cefaclor's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Theacrine interact with any other medications?
Yes. Theacrine has 248 documented drug interactions in our database — Cefaclor is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Cefaclor interact with any supplements?
Yes. Cefaclor has documented interactions with 60 supplements in our database — Theacrine is not one of them. The Cefaclor 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

Theacrine monograph Uses, safety profile, and every drug interaction in one place Cefaclor drug information The full plain-English guide to this medication Cefaclor supplement interactions Every supplement checked against Cefaclor, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Cefaclor and Theacrine?

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.