There are three main categories of cold and flu medicines：

Category 1，Drugs that improve the symptoms of respiratory catarrh, this class of drugs is more effective in improving symptoms, such as Tylenol, the main ingredient is acetaminophen, and pseudoephedrine, antihistamine drugs, can help patients to reduce sneezing, runny nose, improve the patient's nasal mucous membrane congestion, relieve nasal congestion, and facilitate the patient's sleep, this class of drugs is often confused with Tylenol, Tylenol has one more word, but it is It is often confused with Tylenol, which has one more word, but it is a medicine to reduce fever and usually needs to be applied only when it is above 38.5°C.

Category 2，Chinese medicines, such as cold and flu clearing and fever punch, Pan Lan Gen, Lian Hua Qing Fei, etc., have a clearing and detoxifying effect and can also improve the patient's cold symptoms.

Category 3，Fever-reducing medication, for patients with colds who occasionally have a fever, can be applied if the body temperature exceeds 38.5°C or more, such as acetaminophen, ibuprofen, etc.(The above information is from the internet)

Most cold and flu medicines, whether they are Western, Chinese or compounded, are OTC (over-the-counter) drugs, and many people buy them as they would buy everyday consumer goods in a self-service supermarket, picking them up and going straight to the front counter to check out, the main variety that sells well in pharmacies. When they can't find a variety they commonly use, the purchaser simply exchanges a few words with the shop assistant for an idea. Also, many people tend to buy more than one type of cold medicine at a time, and some even buy both Chinese and Western medicines.

Therefore, I would like to remind you of the following points：

1、Do not stack medications for colds

2、If capsule medication is available, do not open the capsule for administration without the pharmacist's consent

Capsules should not be taken with hot water, such as norfloxacin capsules, vitamin E capsules, etc. Capsules are made of gelatine, which is easily soluble in stomach acid. Most of the medicines in capsules are irritating to the stomach mucosa or easily destroyed by digestive juices, while some are slow-release capsules, which can only be swallowed intact. Hot water may cause the capsule shell to melt away prematurely, reducing its effectiveness or increasing irritation.

3、Take your medicine one by one

Drinking a cup of hot water with a pill straight down is the usual action for many people when drinking medicine, but in fact this is likely to make some medicines much less effective.

4、Finally, read the instructions in the packet and take it as instructed by your doctor.

If you experience any side effects that are not caused by the drug, you must return to the doctor immediately.

5、Take most medications and drink at least 150-200ml of water

If you are taking capsules, increase the amount of water you drink, otherwise the capsules tend to adhere to the stomach lining, leading to a high local concentration and irritation of the gastric mucosa.