Pseudoephedrine

That exact med. Not the Sudafed with the useless phenylalanine nonsense that has been demonstrated to do fuck all. You may have to ask the pharmacist for it - it’s not prescription but Feds made stores move it behind the counter. Ask for the generic, it’s cheaper. Really works

Side effects suck though, dry mouth, maybe a little agitation. But it’ll clear you right up.