1/24/14

Neostigmine

Neostigmine - is a cholinesterase inhibitor leading to prolongation of Ach action.This will enhance parasympathetic activity in the gut and increase intestinal motility. When used for acute colonic pseudo-obstruction, organic obstruction of the gut must first be excluded and it should not be used shortly after bowel anastomosis (Ponec RJ, et al. N Engl J Med 1999; 341: 137–41). Colonic pseudo-obstruction, which is the massive dilation of the colon in the absence of mechanical obstruction, can develop after surgery or severe illness. Most cases respond to conservative treatment. In patients who do not respond, colonic decompression is often performed to prevent ischaemia and perforation of the bowel. Colonoscopy in these patients is not always successful and can be accompanied by complications such as perforation.

Uses
Colonic pseudo-obstruction (unlicensed)

Administration
• IV bolus: 2.5 mg, repeated 3 hours later if no response to initial dose Monitor ECG (may need to give atropine or other anticholinergic
drugs to counteract symptomatic bradycardia)

Contraindications
Mechanical bowel obstruction
Urinary obstruction

How not to use neostigmine
It should not be used shortly after bowel anastomosis

Adverse effects
Increased sweating
Excess salivation
Nausea and vomiting
Abdominal cramp
Diarrhoea
Bradycardia
Hypotension
These muscarinic side-effects are antagonised by atropine

Cautions
Asthma

Organ failure
Renal: reduce dose

Renal replacement therapy
No further dose modification is required during renal replacement therapy

1 comments:

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