Compounded GLP-1 medicines in the UK and US

What compounding means

Compounding generally means preparing or modifying a medicine for one patient's needs. The US has its own federal and state frameworks, with different categories of compounder. FDA-approved medicines and compounded medicines go through different approval processes.

The FDA has warned about unapproved GLP-1 products, citing quality concerns and dosing errors. Whether a given compounded supply is allowed can depend on clinical need, availability and the current rules. Those rules change. An article from the shortage period will not tell you where the law stands today.

How UK rules on unlicensed medicines work

In the UK, unlicensed medicines, sometimes called specials, may be supplied to meet a special clinical need when no available licensed medicine can meet it. NHS Specialist Pharmacy Service guidance sets this apart from saving money, convenience or a service's own preference.

A US website's account of compounding gives you no UK right to the same product and no reason to import it. UK rules govern manufacturing, prescribing, dispensing and import. A UK clinician using a licensed medicine off-label is also doing something different from prescribing an unlicensed compounded formulation.

Equivalence needs evidence

A shared ingredient name tells you nothing about formulation, absorption, quality or clinical performance. Added vitamins or a different concentration do not make a product better or more personal by default. Ask what the clinical need is and what evidence backs the exact preparation.

Vials also leave you to turn a prescribed mass into a measured volume. FDA reports show how confusion over concentration and units has led to serious errors. Never borrow a conversion from someone else's vial. Syringe units are not a universal measure of milligrams.

Questions to ask before you consider an unlicensed medicine

Ask why no available licensed product meets your need. Ask who makes and supplies the product, what evidence supports its quality, and how monitoring and side-effect reporting will work. Your prescriber should explain the extra uncertainty and record the decision.

Look hard at any seller marketing a compounded medicine mainly as a cheaper swap for the brand. Check current regulator guidance. Ignore testimonials and claims such as a pharmacy being FDA approved. Legitimate unlicensed supply is a specific clinical arrangement with the usual medicine safeguards still in place.

Check the date of any legal claim

Compounding rules, shortage decisions and enforcement positions change. Some sellers quote an old regulator statement that no longer applies, or quote a US rule to a UK customer. Ask for the exact current rule and the country it covers. Then confirm it with the regulator or a qualified professional. We explain the differences here. We cannot vouch for the legality of a particular seller, preparation or shipment on the day you buy.