J.M.
Try an antihistimine instead. A decongestant relieves the the congestion, but an antihistimine will prevent the congestion from forming. My pediatrician told me that antihistimines also reduce swelling in the nose and throat which can really help with snoring. The problem will be finding the antihistimine that works for your husband. The 3 most popular are Claritin, Allegra, Zyrtec...all available over the counter. They vary in effectiveness so you may want to talk to a pharmacist about which one is the best choice.