The aim of this clinical trial is to determine whether nicorandil works in minimizing disease severity in patients with rheumatoid arthritis. The study will also assess the safety and tolerability of nicorandil. The main questions it aims to answer are:

• Could nicorandil improve disease severity and symptoms of rheumatoid arthritis?
• Does nicorandil lower the number of times participants need to use pain relieve medications?
• Does the nicorandil improve participants functionality and ability to carry out daily activity?
• Does nicorandil correct disease-associated damage and inflammation?
• What side effects do participants have when taking nicorandil? Researchers will compare nicorandil to a placebo (a look-alike substance that contains no drug) to see if nicorandil works to decrease symptoms and severity of rheumatoid arthritis.

Participants will:

• Take nicorandil or a placebo two times daily for 3 months
• Visit the clinic once every month for checkups
• Keep a diary of their symptoms and the number of times they use a pain reliever