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 â During clinical trials, peak plasma concentrations of a single dose 10 or 30 mg of Adderall to healthy volunteers occur about 3 hours post-dose for both d-amphetamine and lamphetamine. In comparison, maximum plasma concentration of Adderall XR is about 7 hours.Half life â When administering Adderall normally, the average elimination half-life for d-amphetamine occurs at 9 â 11 hours post dose vs. 11.5 â 14 hours for l-amphetamine.n comparison, maximum plasma concentration of Adderall XR is about 7 hours. Half life â When administering Adderall normally, the average elimination half-life for d-amphetamine occurs at 9 â 11 hours post dose vs. 11.5 â 14 hours for l-amphetamine.