You should not take acetylcysteine granules for sinusitis. Sinusitis is an inflammatory disease that occurs in the mucous membrane of the sinuses, mostly caused by upper respiratory tract infections, such as bacterial, fungal or viral infections, etc. The main manifestations are nasal congestion, runny nose, head and face pain, loss or loss of sense of smell and so on. Clinically, it can be divided into acute sinusitis and chronic sinusitis. Acetylcysteine granules is a kind of western medicine with expectorant effect. It is used for patients with chronic bronchitis and other coughs with sticky phlegm that cannot be easily coughed up. Common adverse reactions to this drug include choking, bronchospasm, nausea, vomiting, runny nose, and stomach upset. Allergic to the product is contraindicated in patients with asthma. Use with caution in allergic individuals. Elderly patients with severe respiratory insufficiency should be used with caution. From the action of acetylcysteine granules, it can not be used to treat sinusitis. Sinusitis, should go to the regular hospital, under the guidance of professional doctors standardized treatment, do not blindly self-medication, so as not to aggravate the condition or produce adverse reactions.