Your lower back pain radiating to the legs may be due to nerve irritation (such as sciatica), often caused by a slipped disc or spinal strain. The additional pain in your shoulders and finger joints may suggest an inflammatory joint condition, such as arthritis affecting multiple joints. It is important to see a doctor for a proper examination, including blood tests and imaging, to identify the underlying cause. In the meantime, avoid prolonged sitting, maintain gentle movement, and use simple pain relievers like paracetamol or ibuprofen if appropriate for you.

Given your history of a stomach ulcer, Etoricoxib should be used with caution as it may still increase the risk of stomach irritation and bleeding, even though it is gentler than some other painkillers. It is usually safer only when prescribed with a stomach-protective medicine, such as a proton pump inhibitor, or if your doctor feels the benefits outweigh the risks. Tendonex 4D is generally safe, as it is a nutritional supplement and does not usually affect the stomach. It is best to discuss this with your doctor before starting these medications, so they can adjust the treatment plan based on your ulcer history.