Patients with ankylosing spondylitis, if not well controlled, can exhibit elevated erythrocyte sedimentation rates (ESR). An ESR higher than 20 mm per hour indicates elevation, suggesting poor disease control. At such times, it is necessary to utilize non-steroidal anti-inflammatory drugs (NSAIDs) such as sustained-release diclofenac sodium tablets. Additionally, medications that control the condition should also be used, like sulfasalazine tablets and thalidomide, among others. While biological agents, commonly tumor necrosis factor (TNF) antagonists, offer the best treatment effectiveness, they are also the most expensive. (The use of medications should be conducted under the guidance of a physician.)