20 to 50     : Dose as in normal renal function
10 to 20     : Dose as in normal renal function
<10           : Dose as in normal renal function
DOSE IN PATIENTS UNDERGOING RENAL REPLACEMENT THERAPIES
CAPD                :Not dialysed. Dose as in normal renal function
HD                     :Not dialysed. Dose as in normal renal function
HDF/high flux   :Unknown dialysability. Dose as in normal renal function
CAV/VVHD      :Unknown dialysability. Dose as in normal renal function
IMPORTANT DRUG INTERACTIONS
Potentially hazardous interactions with other drugs
Anaesthetics: enhanced hypotensive effect
Analgesics: NSAIDs antagonise hypotensive effect
Anti-arrhythmics: increased risk of myocardial depression and bradycardia; increased risk of bradycardia, myocardial depression and AV block with amiodarone
Antibacterials: concentration reduced by rifampicin
Antidepressants: enhanced hypotensive effect with MAOIs
Antihypertensives: enhanced hypotensive effect; increased risk of withdrawal hypertension with clonidine; increased risk of first dose hypotensive effect with post-synaptic alpha-blockers such as prazosin
Antimalarials: increased risk of bradycardia with mefloquine
Antipsychotics: enhanced hypotensive effect with phenothiazines
Calcium-channel blockers: increased risk of bradycardia and AV block with diltiazem; hypotension and heart failure possible with nifedipine and nisoldipine; asystole, severe hypotension and heart failure with verapamil
Diuretics: enhanced hypotensive effect Moxisylyte: possible severe postural hypotension
Sympathomimetics: severe hypertension with adrenaline and noradrenaline, and possibly with dobutamine
ADMINISTRATION
Reconstition
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Route
Oral
Rate of Administration
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Comments
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OTHER INFORMATION
Use with caution in patients with chronic obstructive airways disease, asthma or diabetes