Gastroparesis is most often caused by
- diabetes
- postviral syndromes
- anorexia nervosa
- surgery on the stomach or vagus nerve
- medications, particularly anticholinergics and narcotics (drugs that slow contractions in the intestine)
- gastroesophageal reflux disease (rarely)
- smooth muscle disorders such as amyloidosis and scleroderma
- nervous system diseases, including abdominal migraine and Parkinson's disease
- metabolic disorders, including hypothyroidism
