Isoprinosine tablets have the effects of anti-allergy, anti-dizziness, sedation, antiemetic, etc. Side effects such as itchy skin, drowsiness, nightmares, easy to be excited and agitated may occur with large amount of use. Isoprinosine tablets belong to antihistamine drugs, with antiemetic, antidizziness, antiallergic, sedative and other effects, in the clinic can be used for the treatment of allergies of the skin mucous membranes, the prevention of motion sickness, seasickness and so on. It can also be used for preoperative and postoperative sedation, hypnosis, as well as some anesthesia and postoperative nausea, vomiting and so on. There are no significant side effects when Isoprinos tablets are taken in small doses, but large quantities or prolonged applications increase the skin’s sensitivity to light. Adverse reactions such as itching, erythema, and peeling may occur if the skin is exposed to sunlight, and side effects such as drowsiness, frequent nightmares, and easy excitement and agitation are also likely to occur. It is contraindicated in people who are allergic to the product and the ingredients contained in it, in patients who are comatose or have central nervous system depression for any reason, and in children under 2 years of age. The product is contraindicated in patients within 14 days after taking monoamine oxidase inhibitors. It is contraindicated in pregnant and lactating women. It is recommended that patients consult a professional doctor before taking the drug, take the drug as prescribed by the doctor, and if any serious discomfort occurs during the use of the drug, consult a doctor in a timely manner to avoid adverse consequences.