Sulphasalazine is used to treat inflammatory arthritis and some inflammatory bowel diseases.  It is given to reduce inflammation in your joints.  It is not a painkiller and you should continue to take your other medication as advised.

• a serious breach of your contract (eg not paying you or suddenly demoting you for no reason)
• forcing you to accept unreasonable changes to your conditions of employment without your agreement (eg suddenly telling you to work in another town, or making you work night shifts when your contract is only for day work)
• bullying, harassment or violence against you by work colleagues
• making you work in dangerous conditions