Dihydrocodeine is available in Japan as tablets which incorporate two.5 mg of dihydrocodeine phosphate and caffeine, the decongestant d,l-methylephedrine HCl, plus the antihistamine chlorpheniramine, and packets of granules which effervesce like Alka-Seltzer with 10 mg of dihydrocodeine with lysozyme and chlorpheniramine, marketed for OTC sale as… Read More