Coenzyme Q10: The supplement asked for alongside statins

What it is

Coenzyme Q10 (ubiquinone or ubiquinol) is a substance the body makes and that takes part in energy production in mitochondria. It is sold as capsules and is frequently requested by people on statins for muscle discomfort. It has no authorised EU health claims.

The key question is whether it really helps with statins: studies have not shown a clear benefit, and in case of muscle pain the important thing is for the doctor to review the treatment.

What is known

It takes part in the energy production chain and acts as an antioxidant:

Statins reduce coenzyme Q10 synthesis, but the benefit of supplementing it for muscle pain is unproven.
It is absorbed better with a meal containing fat.
It is usually well tolerated, with occasional digestive upset.

At the counter

When to recommend it

Someone who already takes it and tolerates it: check the medication they take
With the fattiest meal of the day, if they decide to take it
Assessing muscle pain with their doctor, which is what really matters

When not to

As a substitute for reviewing a statin that causes muscle discomfort
With vitamin K antagonist anticoagulants (acenocoumarol, warfarin) without telling their doctor
Pregnancy and breastfeeding: insufficient data

What to say at the counter. If they ask for Q10 "because of the statin", ask about the discomfort: if there is severe muscle pain or weakness, they should consult their doctor before adding anything. And if they take acenocoumarol, warn that the INR can change.

Warnings

Important ANTICOAGULANTS (acenocoumarol, warfarin): it may reduce their effect because of its similarity to vitamin K; tell the doctor and monitor the INR.
Important SEVERE MUSCLE PAIN ON A STATIN: it can be rhabdomyolysis; not something to solve with a supplement: consult.
Caution No authorised EU health claim: do not promise heart or muscle benefits.
Worth knowing Ubiquinol usually costs more without proven superiority in healthy people.

Pharmacokinetics

Absorption: Low and variable; improved by fat in the meal.
Distribution: Spreads through tissues, especially heart, liver and kidney.
Metabolism: Recycled between its two forms inside the body.
Elimination: Mainly in faeces.

Ubiquinone and ubiquinol

Aspect	Ubiquinone	Ubiquinol
What it is	The oxidised form, the best studied	The reduced form
Price	Lower	Higher
Proven advantage	The reference	Not shown in healthy people
In the body	Converts to ubiquinol	Converts to ubiquinone

There is no reason to recommend the dearer one without proof it is better.

Self-assessment

Three questions. When you check your answers you will see the explanation for each one.

A patient on acenocoumarol wants to take coenzyme Q10. What do you do? Tell them to take it together with the anticoagulant Warn it may reduce the effect and that they should consult their doctor Give it without more
Is it proven that Q10 relieves statin muscle pain? No Yes Only in older people
A patient on a statin has severe muscle pain. What do you do? Recommend Q10 Refer to the doctor Say it is normal

Training content. It does not replace the summary of product characteristics or clinical judgement.

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