Predisposing factors:
Manifestations:
Cardiac:
- Bradycardia and variable degree of heart block.
- Paroxysmal atrial tachycardia
- Any type of arrhythmia (e.g. ventricular premature beats, bigemeny, trigemeny, ventricular tachycardia, etc.)
Extracardiac:
- GIT: anorexia, nausea and vomiting (due to ++ of CTZ).
- CNS: headache, delirium, hallucination, and convulsions.
- Vision: yellow vision , diplopia, etc. due to retrobulbar neuritis.
- Others: skin rash, gynecomastia, galactorrhea.