NUHIST is a combination of Caffeine, Diphenhydramine, Paracetamol, and Phenylephrine which belongs to the group of medicines called CNS Stimulants, Antihistamines, Analgesics-Antipyretics, and Nasal Decongestants respectively. It is used to relieve flu and cold symptoms, headache, body ache, extreme weakness, watery eyes, fever, cough, sore throat, sneezing, runny, and congested nose.