Caffeine+Diphenhydramine+Paracetamol+Phenylephrine is a combination of four medicines: Paracetamol, Caffeine, Diphenhydramine, and Phenylephrine. This combination is helpful in relieving the symptoms of cold such as body ache, headache, fatigue, fever, watery eyes, sneezing, cough, sore throat, runny and stuffy nose.