Question about ADT

[Guest guest]

One of the things I've always wondered about with respect to ADT

is how they make different doses work.

Most drugs I know about have a " half-life " which is the period of

time it takes for approximately half of the drug to be broken

down in the body. For example, if the half life is 1 day, then

if you take 10 mg of a drug, the next day half (5 mg) will be

left. The day after, half of that will be left (2.5 mg), the day

after that, half again (1.25 mg) and so on.

I read recently that the half-life of Lupron is about 3 hours.

So how do they get it to work for 30, 90, or 120 days with one

injection?

Do they inject a timed release formula? The idea would be to

chemically bind the Lupron to another chemical that breaks down

much more slowly, releasing small amounts of Lupron each day.

Does the dose break down quickly, but it is such a large dose

that it has a long-lasting effect for 30, 90, or whatever number

of days?

If anyone knows the answer, I'm very curious to hear it.

Thanks.

Alan