The Procedure
1. Obtain a quantity of tablets containing codeine, check to see if they contain anything other than codeine, caffeine, acetaminophen or aspirin. If they do, and you don't know whether or not it will be a problem, your best bet is not to use them. Measure out your desired amount of codeine (ex. 64 mg = 8 tablets * 8mg/tablet). You may want to add 2 extra tablets as it is quite likely you will lose some codeine in the procedure. As you get more experience with the procedure you will be able to get approx. 95% of the codeine extracted.
2. Measure out some nice hot water, use approx. 40ml / 20 tablets or more if needed. I would suggest you don't go over 50ml for 20 tablets. I don't know if the use of boiling water would destroy any of the codeine but your best bet is not to use it. Use hot water but not boiling. Make sure the tablets dissolve completely. Some dissolve on contact with water while others need some help dissolving by crushing them. Note : not all of the tablet will dissolve, there are water-insoluble fillers in the tablet and not all of the A/A will dissolve either(which is what we want).
(Most sources recommend that codeine not be stored at temperatures in excess of 40C (104F), so its probably better to use warm, but not hot, water. I find that it is best to crash the tablets completely in a container, and then dissolve them in a glass with water.)
3. Place the solution in a cold bath, I just use some ice cubes in a container of water. Stir the mixture occasionally until the solution drops to about 15C or lower. You won't need a thermometer to measure the temperature, just make sure it's "cold". This will take about 30 min. If you wish to speed this up, you can use less water to dissolve the tablets, and add ice chips to cool the mixture faster. Just make sure you don't add so much ice that you drastically increase the volume of the mixture.
4. Filter the solution using whatever you have. Coffee filters work well, but lab filters work the best. Just make sure you don't end up with obvious solids in the filtered solution. This will take about 1 hr. You may also want to rinse the solids left over in the filter with some ice-water to extract any remaining codeine.
(With aspirin this will take only about 20-30 minutes.)
[Erowid Note -- The described method may not form crystals large enough to be filtered by non-lab grade filters (i.e. coffee filters). A reader suggests no agitation during cooling, slow stirring until a temperature of 15 degrees C is reached, and a period of 5-10 minutes with slow chilling on ice prior to moving the mixture into the refrigerator. Note that crystals may not be visible, and cloudiness may not indicate crystallization.]
5. Drink and enjoy! The solution will be _very_ bitter, so I mix a little Kool-aid powder into the solution. The taste isn't really bad but it's similar to sucking on a lemon.
(One gets used to the taste after a while.
)
6. Sit back and wait for the effects. Because the codeine is already in solution it only needs to be absorbed, while codeine in the tablet form must dissolve before being absorbed. Because of this, the effects will probably become noticeable within 15min.
Note : I don't suggest you evaporate the mixture unless you are willing to wait a while. The Merck index warns that codeine is sensitive to heat and light. For that reason if you wish to evaporate the mixture, do it without heat, and shield the solution from light.
