Give injection into a central or large peripheral vein to ensure
that the medicine reaches the systemic circulation.
Follow
injection by a rapid sodium chloride 0.9% flush
All uses
Adult and child > 12 years: initially 3 mg as a
rapid IV bolus (over 2 seconds). If necessary, give additional 6
mg after 1‒2 minutes followed by 12 mg after a further 1‒2
minutes if necessary until tachycardia is terminated
Child 1 month‒12 years: initially 0.1 mg/kg.
Repeat injection every 1‒2 minutes if necessary, increasing dose
by 0.05‒0.1 mg/kg until tachycardia is terminated or maximum
single dose of 0.5 mg/kg (12 mg)
Child 0‒1 year: initially 0.15 mg/kg; if
necessary repeat injection every 1‒2 minutes increasing dose by
0.05‒0.1 mg/kg until tachycardia is terminated or maximum single
dose of 0.3 mg/kg (12 mg) has been given