Hello and welcome.Some of the common side effects of fludrex are headache,loss of appetite,nausea and stomach
upset.More serious side effects could be- allergic reactions breathing problems with chest pain,
confusion,nervousness,hallucinations, pain, tingling & numbness in the hands & feet, trouble in
passing urine,trouble in sleeping,bloody diarrhea with stomach pain.With any drugs side effects are more
common when used without a prescription and in wrong dose.Hope this helps.Take care.