Per 12oz can: 47.3mg caffeine. Royal Crown (RC) colas have been around for a long time and are currently owned by Cadbury Schweppes. As in the case of Diet Coke â here the diet version has more caffeine than the regular RC Cola. 2.
Modafinil is readily absorbed after oral administration, with peak plasma concentrations occurring at 2-4 hours. The bioavailability of modafinil tablets is approximately equal to that of an aqueous suspension.
Peak levels and half life of OxyContin. The effects of OxyContin start one hour after administration and last for 12 hours in the controlled release formula. Peak plasma concentrations of OxyContin vary by dosage, but are reached between 4-5.5 hours after taking the medicine. Stable plasma levels are reached within 24 hours. The half life of OxyContin (extended release oxycodone) is 4.5 hours compared to 3.2 hours for immediate release oxycodone.