Acetylcysteine

Indications

Paracetamol poisoning.

Method of administration

Paracetamol overdose

Useful if given within 10–12 h (possibly up to 24 h).
Take paracetamol levels after 4 h. Treat if above appropriate treatment line.

Cystic fibrosis

By inhalation: to liquefy sputum, but often causes bronchospasm.
By nasojejunal tube: to alleviate distal intestinal obstruction syndrome.