Etova 400 (Etodolac 400 mg) tablets can be used to relieve mild to moderate pain and inflammation, but taking them twice a day should only be done under a doctor's guidance. Since you have severe knee pain that makes walking difficult, it is important to consult a doctor before starting or adjusting this medication.

• Medication Use and Dosage: Etodolac is a nonsteroidal anti-inflammatory drug (NSAID) that reduces pain and swelling by blocking certain enzymes. The exact dose and frequency depend on your condition and should be prescribed by a doctor.
• Safety and Side Effects: Taking Etodolac twice daily may cause side effects like stomach pain, indigestion, nausea, or increased risk of bleeding. It should be taken with or after food to minimize stomach issues.
• Severity of Pain: Severe knee pain affecting mobility requires evaluation by a specialist such as an orthopedist or rheumatologist to identify the cause and recommend appropriate treatment.
• Medical Supervision: Avoid self-medicating or changing the dose without medical advice to prevent complications and ensure effective pain management.

Please consult your doctor or an orthopedic specialist promptly for a thorough assessment and personalized treatment plan. If your pain worsens suddenly or you experience symptoms like severe stomach pain or bleeding, seek emergency care immediately.To narrow down potential causes, we will need some more information.I understand you have severe knee pain and are finding it difficult to walk. Please note that I am an AI and cannot provide medical advice. It is best to consult a doctor to determine appropriate medication and dosage.