Diacerein is a disease modifying anti-rheumatoid drug used in the treatment of osteoarthritis and chronic inflammatory arthritis. It is a slow-acting drug taken that may slow down the breakdown of cartilage and relieve pain, swelling and slows progression of osteoarthritis. The most common side effect of the drug is diarrhea.
Even though not documented, it is possible that your low platelet count (thrombocytopenia) is due to the drug. The only way to check this is to stop the drug and monitor the counts. It may also be due to the primary disease itself. In case the thrombocytopenia persists, please contact a hematologist who can examine you and investigate appropriately.