Fenlong S Tablet is a pain relieving medicine. It is used in various conditions such as muscle ache, back pain, joint pain, menstrual cramps, and toothache. It also promotes healing at the site of inflammation. Fenlong S Tablet can be taken with or without food. The dose and duration will depend on what you are taking it for and how well it helps your symptoms. You should keep taking the medicine even if you feel better until the doctor says it is alright to stop using it. Using this medicine may cause few common side effects such as nausea, vomiting, diarrhea, constipation, and loss of appetite. If you experience any such side effects that does not go away or get worse, you should let your doctor know. Your doctor may be able to suggest ways of preventing or reducing the symptoms. In general, you should try to use the smallest amount necessary to control your symptoms. Before using the medicine, you should tell your doctor if you have any other medical conditions or disorders. It may also affect, or be affected by, some other medicines you are using so let your doctor know all the other medicines you are taking. It should be used with caution in patients who are alcoholic or have liver or kidney disease. Pregnant and breastfeeding women should consult their doctors first before using the medicine.