Paracetamol should be used with caution in patients suffering from pyloroduodenal obstruction, hyperthyroidism, peptic ulcers, as well as glaucoma, hypertension, prostatic hypertrophy, and bladder neck obstruction. Paracetamol tablets, also known as chlorpheniramine maleate tablets, is a more commonly used anti-allergic drugs, drugs in the use of the process of a certain degree of adverse reactions, the most common of which is the inhibition of the nervous system, as well as anticholinergic effects, mainly manifested in dizziness, drowsiness, dry mouth and increased urination. Overdose or prolonged use may cause urinary retention in patients with enlarged prostate and bladder neck obstruction. For patients with glaucoma and hyperthyroidism will aggravate the symptoms of the disease.