what are the side effects of sulfasalazine tablets?
The most common side-effects of sulfasalazine are nausea (feeling sick), diarrhoea, stomach pain, dizziness, headache and skin rashes. These side-effects usually occur during the first 3 months of treatment. Taking sulfasalazine can affect the blood count (one of the effects is that fewer blood cells are made). It can also affect your liver. You should tell your doctor or rheumatology nurse specialist straight away if you develop any of the following after starting sulfasalazine: 1  a sore throat. 2  a fever.