Dorzolamide Hydrochloride, Timolol Maleate & Nutrient Depletion
Also searched as Cosopt PF. What the clinical evidence reports, what it may mean, and what to discuss with your pharmacist.
Dorzolamide Hydrochloride, Timolol Maleate has been associated with depletion of COENZYME Q10. This does not mean a deficiency will occur — it means these are worth knowing about and, if you take Dorzolamide Hydrochloride, Timolol Maleate long-term, worth raising with your pharmacist or healthcare provider.
Take more than one medication? Open the checker with Dorzolamide Hydrochloride, Timolol Maleate pre-loaded and add the rest to see overlapping nutrient signals.
Reported nutrient depletions with Dorzolamide Hydrochloride, Timolol Maleate
Each record below is shown as published in our licensed clinical database, with its evidence rating and citations. Expand a section for food sources and talking points.
COENZYME Q10
Insufficient EvidenceBETA-BLOCKERS
Beta-blockers are thought to inhibit coenzyme Q10 mitochondrial enzymes and decrease endogenous levels of coenzyme Q10. However, it is not clear if this reduction is clinically significant. There is no reliable evidence that coenzyme Q10 depletion contributes to beta-blocker side effects.
Timolol, the beta-blocker in this eye drop combination, may interfere with certain enzymes inside your cells' mitochondria, which are the tiny structures that produce energy, and some research suggests this can nudge coenzyme Q10 levels down. Coenzyme Q10 is a compound your cells use to generate that energy and act as an antioxidant. That said, the evidence here is rated insufficient, meaning no one really knows if this drop is meaningful in practice. For most people using these drops, there is nothing urgent to act on, but your pharmacist or doctor is a good sounding board if you have questions.
What Coenzyme Q10 (CoQ10) does & food sources
CoQ10 helps cells produce energy and acts as an antioxidant; heart and muscle tissue use it heavily.
Common food sources:
- Organ meats and fatty fish
- Whole grains
- Nuts and seeds
HelloPharmacist pharmacist-reviewed education — separate from the licensed record above.
What to discuss with your clinician
There is no routine blood test for CoQ10 in everyday practice. If you have new, unexplained muscle symptoms on a medication linked to CoQ10 (statins are the best-known example), talk to your prescriber before changing anything — symptoms have many possible causes and your prescriber has several options.
HelloPharmacist pharmacist-reviewed education — separate from the licensed record above.
Supplement considerations
CoQ10 is generally well tolerated, but evidence for supplementing (for example, for statin muscle symptoms) is mixed. It may also modestly affect warfarin — check with your pharmacist before combining.
Do not start or stop medications or supplements without professional guidance — supplements can interact with prescription medications.
HelloPharmacist pharmacist-reviewed education — separate from the licensed record above.
Caution: Do not stop a prescribed medication because of this association — discuss any symptoms with your prescriber first.
Learn more about this nutrient: Coenzyme Q10 — uses, safety & interactions
References (1)
- Kishi H, Kishi T, Folkers K. Bioenergetics in clinical medicine. III. Inhibition of coenzyme Q10 enzymes by clinically used anti-hypertensive drugs. Res Commun Chem Pathol Pharmacol 1975;12:533-40.
This tool is educational and is not a substitute for professional medical advice. An association is not a diagnosis and does not mean a deficiency will occur. Always talk to your pharmacist or healthcare provider before starting, stopping, or changing any medication or supplement.
Disclaimer: This checker finds which nutrients might be depleted by prescription or over-the-counter medications. Each nutrient depletion issue is rated based on clinical significance. Use your own professional judgment prior to making clinical decisions.© 2026 Therapeutic Research Center Licensed records refresh weekly · last updated July 3, 2026.
More about Dorzolamide Hydrochloride, Timolol Maleate
What drug-induced nutrient depletion means
Some medications can, over time, lower the levels of certain vitamins, minerals, or other nutrients — through reduced absorption, increased loss, or changes in how the body uses them.
Association is not deficiency
An entry here means a depletion has been reported or studied — not that it happens to everyone, or that you are deficient. Dose, duration, diet, and your own health all matter.
Evidence varies by pair
Some drug–nutrient links (like metformin and vitamin B12) are well studied; others rest on limited or preliminary research. Each entry shows the evidence rating from our licensed clinical database.
When to ask about labs
If you take an associated medication long-term, ask your healthcare provider whether monitoring is appropriate for you. Not everyone needs testing — your provider can weigh your dose, duration, and symptoms.
Don't self-supplement blindly
Supplements are not risk-free: some can interact with medications, and some (like potassium or magnesium) can be risky with kidney disease. Talk to your pharmacist before adding anything.
Never stop a medication over this
These medications are prescribed for good reasons, and the benefit usually far outweighs a manageable nutrient consideration. Any change belongs in a conversation with your prescriber.
Food first, usually
For many nutrients, a varied diet covers the gap. Each entry lists common food sources; a supplement is a decision to make with your pharmacist or provider, not a default.
Dorzolamide Hydrochloride, Timolol Maleate & nutrients: FAQs
Does Dorzolamide Hydrochloride, Timolol Maleate deplete COENZYME Q10?
Should I take a supplement because I take Dorzolamide Hydrochloride, Timolol Maleate?
Should I stop taking Dorzolamide Hydrochloride, Timolol Maleate?
Where does this information come from?
Questions about Dorzolamide Hydrochloride, Timolol Maleate and your nutrition?
Ask a licensed pharmacist — free, no appointment needed.
Sources & How We Checked
Nutrient depletion records for Dorzolamide Hydrochloride, Timolol Maleate are evidence-graded and sourced from the Natural Medicines database, and are displayed as published with their citations.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference for drug-induced nutrient depletions, supplements, and interactions — the basis for this page.
- MedlinePlus, U.S. National Library of Medicine — NIH consumer drug information, used for medication overviews across the site.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.