An Bioequivalence Study of Loxoprofen Sodium Patches in Healthy Volunteers

Inclusion Criteria: * Male weight ≥50 kg, female weight ≥45 kg, body mass index (BMI) between 19.0 and 28.0 kg/m2, inclusive . * Informed consent: signed written informed consent before inclusion in the study. * The subjects are well communicated and are able to comply with the requirements of the study Exclusion Criteria: * Participated in other drug intervention studies within 90 days * Allergic to this product and excipients, or have a history of food, drug allergy or other allergic diseases (asthma, urticaria, eczema dermatitis, etc.) * Aspirin asthma * Any visible skin disorder or abnormal skin pigmentation which, in the opinion of the investigator, would interfere with the outcome of the trial. * A history of cardiovascular system, respiratory system, digestive system, urinary system, endocrine system, immune system, nervous/psychiatric system, blood and lymphatic system, and skeletal musculoskeletal system that investigator have determined to be abnormal and clinically significant * Postural hypotension, needle fainting or blood fainting history or venipuncture intolerance * Any drug that inhibits or induces liver metabolism has been used in the 30 days prior to screening. Inducers: barbiturates, carbamazepine, phenytoin sodium, glucocorticoids, omeprazole; Inhibitors: SSRI antidepressants, cimetidine, Diltiazem, nitroimidazoles, sedatives and hypnotics, verapamil, fluoroquinolones, antihistamines * Blood donation or significant blood loss (\>400 mL, except for female menstrual period) in the 3 months prior to screening, blood transfusion or use of blood products, or have a blood donation plan during/within 3 months after the study * Smoked more than 5 cigarettes per day in the 3 months prior to screening, or unwilling to prohibit the use of any tobacco products during the trial period * History of alcohol abuse within 6 months * Subjects who consumed excessive amounts of tea, coffee or caffeinated beverages within 3 months, or who did not agree to the prohibition of tea, coffee or caffeinated beverages in the study * Subjects who have special requirements for diet and cannot comply with a unified diet * History of drug abuse within 1 year * Subjects who have unprotected sex in 2 weeks, or planned to have a child during the study period, planned to donate sperm and eggs, or are unwilling to use one or more non-drug contraceptive methods during the study, or are unwilling to use contraception within 3 months after the study * Pregnant or nursing women * Positive skin scratch test positive * Clinically significant vital signs laboratory, physical examination, or 12-lead electrocardiogram abnormalities as judged by the investigator * Other situations that the investigator determines are not suitable for participating in this clinical trial