Vedi ad esempio (anche se qui si parla di metadone):
Here in Ontario Canada, MMT(Methadone Maintenance Treatment) works like this:
Blood tests are done to ascertain blood chemistry and Hepatitis and HIV status and a urine specimen is collected to prove opiate use. These blood tyests take 2 weeks usually so there is a wait before Methadone is actually dispensed to you.
Methadone is dispensed as an oral liquid at a concentration of 10mg/mL, so 20mg is 2mL of methadone solution. You take a small plastic cup and pour in some juice which is orange Tang, you slide this cup to the Pharmacist and he/she adds your dose to that cup. You take the cup and drink the contents, then I take teh same cup, refill with Tang and drink to wash the Methadone down. The Pharmacist usually engages you in slight conversation to ensure you have swallowed your dose. This procedure is called a "witnessed dose".