Would it be a terrible idea to give my toddler a cough drop?

He is 18 months and has a stuffy nose. There aren't really any decongestants for his age range and I would rather not give him Benadryl since I don't think its allegies. He eats regular table food and I have given him Dum Dums before. I was going to get some Ricolas not anything too strong. If you have any ideas to help clear his nose let me know. We are using Vick's baby rub already.