Skip to content
Compare prices

About us

What Is Monj? Independence, Commissions and Why We Exist

Monj is an independent price comparison index for UK weight-loss and other prescription medicines, run by Medstack Ltd. We do not sell, prescribe or dispense anything. This page explains who we are, how we are paid, why that matters when comparison sites are increasingly run by the pharmacies they list, and what we will not do.

  • Written by Nick Johnson, founder, Medstack Ltd
  • First published 22 July 2025, updated 5 September 2026
  • Information, not medical advice

Key facts

  • Monj is operated by Medstack Ltd, a UK company (No. 16439872). No pharmacy owns, part-owns or controls it.
  • We do not sell, prescribe or dispense medicines and we are not a regulator.
  • We earn commission when a reader chooses a pharmacy through us, and we disclose it. Commission never affects ranking or whether a pharmacy is listed.
  • Listings are ordered strictly by lowest total patient price, including delivery, with any working code applied.
  • Every listed pharmacy is checked against the GPhC register manually, with inspection outcomes shown as a Pharmacy Score.
  • We have refused acquisition offers and do not sell placement, visibility or influence.
  • We pledge 20 per cent of verified annual profits to charity.

What Monj actually is

Monj tracks what UK pharmacies charge for the same prescription medicine and publishes it in one place, updated as prices move. The lists cover Mounjaro across every dose, with sister sites covering Wegovy and other treatments. Alongside price we publish the things that change the real cost or the risk: consultation fees, delivery charges, working discount codes, GPhC registration and published inspection outcomes.

What we are not: a pharmacy, a prescriber, a clinic or a regulator. We cannot supply a medicine, adjudicate a complaint or overrule a prescriber. If you want the mechanics of how the comparison is produced, read how Monj works and how pricing works.

Why independence is worth checking

As the market has grown, so has the number of sites that look like comparisons. Some are run by, or on behalf of, the pharmacies they recommend, without saying so. A site that appears impartial while quietly funnelling readers to one provider is a different product from a comparison, and UK rules take that seriously:

  • The Consumer Protection from Unfair Trading Regulations 2008 prohibit misleading practices, including failing to disclose commercial intent or presenting a trader’s own promotion as independent.
  • The CAP Code requires marketing communications to be obviously identifiable as such.
  • The Human Medicines Regulations 2012 restrict advertising prescription-only medicines to the public.

Before you trust any comparison site, including this one, three checks take a minute: who owns it, whether it discloses commercial relationships, and whether its ranking rule is written down. If a site fails those, treat it as advertising.

If you find a site you believe is presenting advertising as impartial advice, the Advertising Standards Authority handles misleading advertising and undisclosed marketing. Depending on the issue you can also raise it with the GPhC (pharmacy conduct), the MHRA (medicines promotion) or the CMA (consumer protection). You can tell us too and we will pass it on, but we are not a regulator and cannot adjudicate.

The checks we run before listing a pharmacy

  • GPhC premises and superintendent registration confirmed on the official register, with no restrictions.
  • Published inspection outcome recorded and shown as a Pharmacy Score against the five GPhC inspection principles.
  • Prescribing route identified, and prescribers registered with the GMC, GPhC or NMC.
  • UK company and ownership confirmed at Companies House.
  • Cold-chain packaging confirmed. A pharmacy that ships a fridge medicine without insulation and cooling does not get listed.
  • Fees and delivery costs recorded so the published total is what you will pay.
  • Reassessment every three to six months, or sooner if a reader reports a problem.

Pharmacies that stop meeting these are removed. The full method, including corrections and complaints, is in our editorial and review policy.

What we will not do

  • Sell rankings, visibility or influence, or take payment to remove a pharmacy from a list.
  • Publish a price we have not checked, or a discount code we have not tested.
  • Advertise a prescription-only medicine in a way that breaches UK rules, however common the practice becomes.
  • Sell the site to a pharmacy. We have had offers, including one that ended with a promise to copy the site instead. That was their choice to make.
  • Pretend to be neutral about commission. We earn it, we disclose it, and we keep it out of the ranking.

We also give back: 20 per cent of verified annual profits go to charity at the end of each financial year, based on audited figures rather than a promise.

Common questions

Who owns Monj?

Medstack Ltd, a UK company registered at Companies House under number 16439872, founded and run by Nick Johnson. No pharmacy or pharmacy group owns any part of it.

Does Monj make money from pharmacies?

Yes. We earn commission when a reader chooses a pharmacy through us. It does not affect ranking, which is by lowest total patient price only, and we ask some pharmacies for lower commission in exchange for lower prices to readers.

Can a pharmacy pay to appear higher on Monj?

No. There is no paid placement, no sponsored listing and no badge for sale. If a pharmacy is at the top it is because its total price is the lowest at that dose.

Is Monj a pharmacy or a regulator?

Neither. Monj does not sell, prescribe or dispense medicines and has no regulatory powers. Complaints about a pharmacy go to the GPhC; complaints about advertising go to the ASA.

How do I know a comparison site is genuinely independent?

Check who owns it, whether it discloses commercial relationships, and whether its ranking rule is published. A site that hides ownership or cannot say how it orders results is advertising, whatever it calls itself.

Why do some prices look lower on Monj than on the pharmacy’s own site?

Because a tested discount code is applied, or because a pharmacy has agreed a lower commission in exchange for a lower price to our readers. The total shown includes delivery.

Sources

Monj is an independent price information service operated by Medstack Ltd. It does not sell, prescribe or supply medicines, does not give medical advice, and is not a regulator.

Monj is an independent price comparison index operated by Medstack Ltd. We are not a pharmacy and we do not sell, prescribe, supply or dispense medicines. Listings are ranked strictly by the lowest total patient price, with alphabetical order used to break ties. No pharmacy can pay for placement, ranking or badges. Some outbound links earn a referral commission, and this never affects position or inclusion. Read the full independence statement.