Not to be used in clinical cases of vascular stenosis (e. g. aortic stenosis) or obstructive hypertrophic cardiomyopathy.
Substances that deplete blood volume, such as diuretics, or which vasodilate, such as angiotensin-converting-enzyme (ACE) inhibitors, may contribute to lowering systemic blood pressure. This may result in pre-renal uraemia (azotaemia). Renal function should be monitored both before and seven days after commencement of treatment with ACE inhibitors. This also applies when the dosage of an ACE inhibitor or of a concurrently administered diuretic is increased. It is advisable to periodically monitor renal function throughout treatment.
If signs of hypotension occur, treatment with Vasotop should be suspended until fluid and electrolyte status is corrected. Treatment with Vasotop should then be continued at 50% of the original dose. In patients at risk of hypotension, it is advisable to introduce Vasotop gradually over one week (starting with half the therapeutic dose).
Diuretics and a low-sodium diet both potentiate the effect of ACE inhibitors by activating the renin-angiotensin-aldosterone system. High doses of diuretics and a low sodium diet should therefore be avoided during treatment with ACE inhibitors in order to prevent hypotension (with clinical signs such as apathy, ataxia, rarely syncope or acute renal failure). In patients treated concurrently with Vasotop and frusemide, the dose of the diuretic can be reduced to achieve the same diuretic effect as with frusemide alone.
Do not administer with potassium-sparing diuretics.
The concomitant administration of ACE inhibitors with non-steroidal anti-inflammatory drugs (NSAIDs) can potentially lead to poor autoregulation of the glomerular blood pressure and in some individuals can therefore trigger acute renal failure.
No data are available thus far on the use for the drug in bitches during pregnancy and lactation. In the absence of such data, prudence suggests that Vasotop should not be used in pregnant or lactating bitches.
Withdrawal period
Not applicable
For animal treatment only. Keep out of reach of children.