In most cases, bromhexine can be taken for a long time, but those with significant adverse reactions may need to stop taking the drug. 1. Can be taken for a long time: bromhexine is a kind of phlegmatic drugs, for some chronic diseases caused by coughing, coughing up phlegm, phlegm is not easy to cough up, can be taken for a long time bromhexine and other phlegmatic drugs for symptomatic treatment, to help the patient more effective phlegm expectoration. 2. Can not be taken for a long time: bromhexine may lead to nausea, stomach upset, and even transaminase elevation, etc. If there are serious adverse reactions in the process of using the drug, you need to stop using the drug and adjust the treatment program. In addition, bromhexine may cause adverse reactions, such as may have an irritating effect on the gastric mucosa, such as gastritis or gastric ulcer need to be used with caution; may also cause allergies, allergic to the product need to be prohibited. Therefore, the drug needs to be used reasonably under the guidance of a doctor, and pay attention to the observation of adverse reactions.