"I'm not well up on the drug aspect (although I have read up about Lupron) you see to know more. Could I ask how do you know it is used in the UK? And do you know what other drugs are used as puberty blockers? - I'd like to read about them. Thanks"
You can check on the NHS website, just search for 'gnrh agonist', 'puberty blockers', and such like, there's lots and lots of documents.
Here's the official response.
tavistockandportman.nhs.uk/documents/591/16-17365_Puberty_blockers.pdf
"The actual prescribing of puberty blockers is done via our subcontracted sites at University College London Hospital or the Leeds General Infirmary, by Consultant Paediatric Endocrinologists.
- We usually use triptorelin tradenames Gonapeptyl Depot and Decapeptyl SR as these have a licence for children.
- Leuprorelin (tradename Prostap in the UK) is an alternative second line in case of a drug reaction but doesn't carry a specific child licence or for puberty blockade."
Hence they USUALLY use triptolerin under two different trade names, and they RARELY use leuprorelin.
There's a third drug licensed, which is in the same category
www.medicinesresources.nhs.uk/upload/documents/News/2008%20-%20March/17/Triptorelin1107.pdf
namely goserelin (In the US they also have histrelin, which is used on children in some instances also). However, it's possibly only the two drugs above are ever used on children, though I don't think there's in principle anything to stop a doctor prescribing any of the three UK-licensed drugs. The document notes that the cheapest drug is Decapeptyl SR, a form of Triptolerin, and this is probably a consideration within the NHS context.
If you read the document, it's concerned with prostate cancer, where they have done studies on the various side-effects and the default is to go for the drug with the widest body of evidence, rather than something untested. They all act in the same way, so they do studies on things like how well they are tolerated and then make a decision based on that. I'm not aware of a document suggesting that for child puberty that one drug is better than another, I think it's clear that all the drugs will do the same basic job, what you would really need to do is establish the extent to which the various side effects are essentially implict in the mechanism of action, and which are caused by fundamental differences between the drugs.
Clearly it would be EXTREMELY irresponsible to suggest that, for instance, a study showing a certain side-effect as a result of taking leuprorelin, because the study only covered leuprorelin, because that's American practice, and then say 'oh that's leuprorelin, the UK ones are different', without actually looking at clinical evidence that covered BOTH leuprorelin and triptolerin, and said 'actually these side-effects don't occur with triptolerin, only with leuprorelin'.
Clearly the presumption should be that side-effects from leuprorelin are also caused by triptolerin because the two drugs work in the same way, unless we have evidence to the contrary.