<p><strong>Adults</strong>: Usually 1.5 mg daily. This may be taken as a single dose at night or in three divided doses. Dosage should be adjusted to the individual patient requirements up to a maximum of 4.5 mg daily. Up to 3 mg may be given as a single dose.<br />
<br />
<strong>Children (aged over 2 years)</strong>: Up to 1.5 mg daily, usually as a divided dose, although up to 1 mg has been given as a single dose at night.</p>