- Blurred vision.
- Fluctuating abdominal pain (colic)
- Hypersensitivity to the drug or its ingredient.
- Blockage of the gut (intestinal obstruction).
- Obstruction of the urinary tract (urethra).
- Recent heart attack
- Recent surgical procedure.
- Peptic ulcer.
- Vasomotor instability.
- Urinary retention, if the sphincter fails to relax as bethanechol contracts the bladder, urine may be forced up the ureter into the kidney pelvis
- Bacteriuria, this may cause reflux infection.
Interaction: Ganglion blocking compounds may cause severe fall in B.P. Cholinergic drugs: Additive effect may occur. Quinidine, Procainamide: May antagonize cholinergic effects of bethanechol.
Servings: Oral- Adults- 10-25mg 3-4 times daily either 1 hour before or 2 hours after meals