Hazards of succinylcholine administration during electrotherapy

Area of Science:

• Anesthesiology
• Pharmacology
• Ophthalmology

Background:

• Succinylcholine is a common muscle relaxant used in anesthesia.
• Organophosphates, like ecothiophate iodide, are used to treat glaucoma.
• Serum cholinesterase is crucial for metabolizing succinylcholine.

Observation:

• A patient on topical ecothiophate iodide experienced prolonged apnea after electrotherapy.
• This apnea was linked to an interaction between ecothiophate iodide and succinylcholine.

Findings:

• Ecothiophate iodide inhibited serum cholinesterase, increasing succinylcholine's duration of action.
• This resulted in significantly prolonged neuromuscular blockade and apnea.
• Other drugs interacting with cholinesterase levels may pose similar risks.

Implications:

• Clinicians must consider concurrent medications, especially those affecting cholinesterase levels, when administering succinylcholine.
• Awareness of drug interactions is vital to prevent prolonged apnea and manage patient safety.
• Potential hazards like hyperkalemia and cardiac arrhythmias associated with succinylcholine also warrant consideration.