In the outpatient clinic, I met a patient with allergic rhinitis, female, 27 years old, who reported sneezing and nasal congestion for 2 months, and sought medical treatment in her hometown, even infusion treatment, but the effect was not obvious. The patient only knew one thing about the product that was deified when he bought it online, but not the other. I asked the patient to take photos of the purchased medication and send them over. Prohibited methazoline hydrochloride is a drug that is prohibited for long-term use and was eliminated 20 years ago because of its high side effects. Prohibited methazoline hydrochloride can have the following adverse reactions. High concentrations can cause a slight burning sensation, pins and needles, and dryness of the nasal mucosa. Too frequent drops may cause rebound nasal congestion. Prolonged use may cause drug rhinitis, etc. Usage: Use for no more than 7 consecutive days. Precautions: 1. Forbidden for those who are allergic to this product. 2, atrophic rhinitis and dry nasal cavity is prohibited. 3. Use with caution in children, pregnant women, patients with high blood pressure and hyperthyroidism. 4.Forbidden when the drug properties change. 5.If overdose or serious adverse reactions occur, seek immediate medical attention. 6.Children must be used under adult supervision. 7.Please keep this medicine out of the reach of children. Personal advice: It is okay to use nasal hormones or nasal anti-allergy drugs, but the least recommended is nasal mucosal constrictors, because the general public does not know the time of use more than the ingredients, especially children are not recommended to use, even for a short time.