hello systemic lupus erythematosis involves almost all organs of the body.. skin, muscles, blood heart, brain, nerves, kidney, lungs, reproductive organs and even oral cavity is affected... patients having this disease often complain of white patches in oral mucosa which sometimes bleed and sometimes get infected by fungus ..maintaining oral hygiene in this disease becomes difficult...so people develop dental problems like infected teeth and i think the same is happening with you.. now about the drugs ... see the drugs you were taking generally do no harm to the teeth but since you took them for a long time they may cause dental problems like discolouration of teeth and also inflammation of gingival tissues.. friend as now you have stopped taking medicines and you say you normal and have no signs of SLE , now it is correct time to take dental treatment under a good dentall surgeon and please do tell him about your SLE and drugs which you were taking . this will help him to plan the treatment accordingly.... hope it helps thank you... follow up is invited