Dihydrocodeine is accessible in Japan as tablets which have 2.five mg of dihydrocodeine phosphate and caffeine, the decongestant d,l-methylephedrine HCl, along with the antihistamine chlorpheniramine, and packets of granules which effervesce like Alka-Seltzer with 10 mg of dihydrocodeine with lysozyme and chlorpheniramine, promoted for OTC sale as New Bron Alternative-ACE. https://bettersleepuk.com/product/codeine-phosphate-30mg/