I was reading off the back label of a Nyquil bottle and I realized instead of dextromethorphan, it said dextromethorphan HBr.
I also realized that instead of phenylephrine, it said phenylephrine HCl.
Do HBr and HCl give any medical advantages? Or are they included in the medication simply because such substances cannot be removed during synthesis?
I don't know anything about pharmacological science, so any help will be appreciated.