Phenomethamine tablets are widely used in clinical practice as cold and flu medication, which is a compound preparation containing acetaminophen, pseudoephedrine hydrochloride, dextromethorphan hydrobromide and chlorpheniramine maleate. It is commonly used clinically to relieve fever, headache, sore throat, muscle aches, stuffy and runny nose, sneezing and cough caused by cold or flu. Phenomenamine tablets are administered orally, 1 to 2 tablets every 6 hours for adults, not to exceed 8 tablets in 24 hours; 1 tablet every 6 hours for children 6 to 12 years old, not to exceed 4 tablets in 24 hours. Adverse reactions are generally rare, sometimes mild dizziness, fatigue, nausea, epigastric discomfort, dry mouth, lack of appetite and skin rash, which can recover on their own, hypersensitivity, vertigo and insomnia can occur in overdose. Phenomethamine tablets should not be used together with other antipyretic and analgesic drugs, which may increase nephrotoxicity. Interaction with chloramphenicol, barbiturates (e.g. phenobarbital), antispasmodics (e.g. belladonna), phentolamine, digitalis glycosides, etc. should be consulted with physician or pharmacist if used together. As mentioned above, Phenomethamine tablets are a kind of commonly used compound cold medicine. It should be emphasized that alcohol or beverages containing alcohol should not be consumed while taking the medicine. Because it can cause drowsiness, you should not drive a machine, car, boat, engage in high-altitude work, mechanical work and operate precision instruments during the medication. For specific medication, please take into account the clinical situation and be guided by the doctor’s interview.