Anti-sensitizing drugs are the most commonly used drugs in dermatology clinics, and they are needed in the treatment of eczema and urticaria, but for how long can they be taken continuously? Many patients will have doubts, feel that the treatment with anti-sensitizing drugs will have an effect, without itching and lesions are not ideal to control, but continuous eating and feel worried about injury to the liver and kidneys, so often eat and stop, affecting the efficacy. The common anti-sensitivity drugs such as cetirizine hydrochloride, loratadine, chlorpheniramine maleate (paracetamol), and cyproheptadine hydrochloride are generally eaten continuously for 1-2 months without problems, and if you feel uncomfortable after taking them, you can stop them at any time. The side effects of anti-sensitizing drugs are actually very small, and there is basically no harm to the liver and kidneys. When we introduced anti-sensitizing drugs the other day, we said that the side effects of anti-sensitizing drugs are mainly drowsiness and anticholinergic effects. The first generation of antisensitizers such as chlorpheniramine maleate (paracetamol) and cyproheptadine hydrochloride easily cross the blood-brain barrier, leading to drowsiness, fatigue, drowsiness, dizziness, inattention, etc. Some drugs also have anticholinergic effects, leading to dry mucous membranes, urinary difficulties, pupil dilatation, work at height and drivers need to be prohibited or used with caution, glaucoma and prostate hypertrophy also need to be used with caution. The second generation of antisensitizers such as cetirizine hydrochloride and loratadine do not easily cross the blood-brain barrier and do not produce drowsiness or have only a slight sleepy effect, while the anticholinergic effect is small. The drowsiness of the first-generation antisensitizers is stronger, but regardless of whether it is a first- or second-generation antisensitizer, the drowsiness can subside as soon as the drug is stopped. The side effects such as difficult urination and dilated pupils have little effect on normal people, as long as the doctor carefully asked before prescribing the drug glaucoma and prostate hypertrophy patients to avoid the use of the stronger anticholinergic effect of a generation of antisensitizers, for example, often patients say that some of the original and cheap and anti-itch classic old drugs, in fact, in the dermatological antisensitizers are mainly said to be paracetamol and cycloheximide hydrochloride, used for decades, we have heard Others say they have trapped side effects, heard said after taking other side effects? In fact, their side effects may be more important than those of anti-sensitizing drugs, such as tretinoin, which can cause damage to blood and liver function, as well as some traditional Chinese medicines if the dosage is too large, or if the drug itself is toxic, or if it takes too long or too many kinds of traditional Chinese medicines may have some effects on liver and kidney function. The more you take, the better and safer you will be. The use of Chinese medicine also requires science and skill.