Parapharmacy with judgement: What it is, what it isn't and where the limits are

What it is

'Parapharmacy' is not a legal category: it is the trade name for everything sold in a pharmacy that is not a medicine. It covers very different things, each with its own rules: cosmetics, food supplements (vitamins, minerals, herbs), medical devices (compression stockings, test strips, nasal washes) and foods for special purposes.

Customers do not distinguish these categories and ask 'is this a medicine?'. The useful answer is not 'no, it's parapharmacy', but to explain what it is, what it can promise and what it cannot — because a supplement does not treat disease, even if the way it is advertised sometimes suggests otherwise.

Three categories customers confuse

At the counter they sit side by side without the customer seeing the boundary:

COSMETIC: cleanses, protects, improves the appearance. It does not treat. Example: body cream.
FOOD SUPPLEMENT OR MEDICAL DEVICE: it supplements the diet or acts physically. It cannot claim to cure a disease. Example: vitamin D at a supplement dose, compression stockings.
MEDICINE: treats or prevents a disease. It may or may not need a prescription. Example: high-dose vitamin D for a diagnosed deficiency.

At the counter

When to recommend it

Recommend a supplement as support, not as a cure
Explain the difference: 'the vitamin D in a supplement is for maintenance; the high dose the doctor prescribes is to treat a deficiency'
Make the limits clear: 'it doesn't treat the disease; it can go alongside the treatment'
Always ask which medicines they take before recommending a herb or supplement

When not to

Do not present a supplement as if it were a medicine
Do not promise that it cures anything
Do not forget that the dose changes the risk: doubling up on supplements can lead to taking too much

What to say at the counter. The line: 'this doesn't replace your treatment, it goes alongside it.' And before recommending any herb or supplement, the usual question: 'which medicines are you taking?'

Warnings

Important THE DOSE CHANGES THE CATEGORY: vitamin D at a supplement dose and at a high dose for a deficiency are not the same thing. Customers don't see it that way, and can add up products without realising.
Important NO PRESCRIPTION = NO OVERSIGHT: nobody supervises the dose. Customers take what they think is right, sometimes from several products at once.
Caution 'NATURAL' ≠ 'SAFE': St John's wort reduces the effect of anticoagulants, contraceptives and other drugs; ginkgo increases the risk of bleeding.
Caution MARKETING: many supplements use language that sounds like a medicine without being one.
Worth knowing REGULATION: supplements have fewer controls than medicines. Quality varies a lot from brand to brand.

Four ideas to avoid mistakes

A supplement is regulated as a food: it does not go through the efficacy and safety assessment required of a medicine.
The dose counts: the same substance can be sold as a supplement at low doses and as a medicine at high doses.
'Natural' does not mean 'risk-free': many herbs interact with medicines.
Claims are regulated: a supplement may only say what European rules authorise for that substance.

Supplement or medical device vs medicine

Aspect	Food supplement or medical device	Medicine
What for	To supplement the diet or act physically	To treat or prevent a disease
Dose	Maintenance	Therapeutic
Prescription	No	Some yes and some no
What it can promise	Only authorised claims	The authorised indications
Prior assessment	Lighter	Efficacy and safety assessed
Interactions	They exist too	Known and in the product information
Advertising	Regulated, but with plenty of room for marketing	Very restricted

Supplement = support. Medicine = treatment. And both can interact with what the patient already takes.

Self-assessment

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

When does a vitamin stop being a supplement and become a medicine? When the packaging changes When it is authorised and used at therapeutic doses to treat or prevent a disease, such as a diagnosed deficiency Never: a vitamin is always a supplement
A customer asks whether a supplement 'will cure' their problem. What do you answer? 'It depends on the problem' 'No: a supplement supports, but it doesn't treat a disease; that's for the doctor and the treatment' 'Yes, that's what it's for'
Do supplements have fewer interactions than medicines? It depends on the brand No: they have real interactions too Yes, they are always safer

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

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