not sure but trying find Alka Seltzer Plus D a PURPLE capsule. It is the only thing That truly makes me feel good with a bad cold. I used to find it at the pharmacies but having trouble now. Have they quite making it since you have to get it behind the counter or can you recommend another product with the same ingredients Ive tried other things but this is the best . They are Chlorphenamine, Psuedoephedrine, Acetaminophen and Dextrpmethorphan Thanks Mary G