Medically reviewed by Drugs.com. Last updated on May 2, 2022.
HYPERSTAT I.V. Injection was originally recommended for use by bolus administration of 300 mg. Recent studies have shown that minibolus administration of HYPERSTAT I.V. Injection, ie, doses of 1 to 3 mg/kg repeated at intervals of 5 to 15 minutes is as effective in reducing blood pressure. Minibolus administration usually provides a more gradual reduction in blood pressure and thus may be expected to reduce the circulatory and neurological risks associated with acute hypotension.
HYPERSTAT I.V. Injection is administered undiluted and rapidly by intravenous injections of 1 to 3 mg/kg up to a maximum of 150 mg in a single injection. This dose may be repeated at intervals of 5 to 15 minutes until a satisfactory reduction in blood pressure (diastolic pressure below 100 mmHg) has been achieved.
With the patient recumbent, the calculated dose of HYPERSTAT I.V. Injection is administered intravenously in 30 seconds or less.
HYPERSTAT I.V. Injection should only be given into a peripheral vein. Do not administer it intramuscularly, subcutaneously, or into body cavities. Avoid extravasation of the drug into subcutaneous tissues.
Following the use of HYPERSTAT I.V. Injection, the blood pressure should be monitored closely until it has stabilized. Thereafter, measurements taken hourly during the balance of the effect should indicate any unusual response. A further decrease in blood pressure 30 minutes or more after injection should be investigated for causes other than the action of HYPERSTAT I.V. Injection. It is preferable that the patient remain supine for at least 1 hour after injection. In ambulatory patients, the blood pressure should also be measured with the patient standing before surveillance is ended.
Repeated administration of HYPERSTAT I.V. Injection at intervals of 4 to 24 hours usually will maintain the blood pressure below pretreatment levels until a regimen of oral antihypertensive medication can be instituted. The interval between injections may be adjusted by the duration of the response to each injection. It is usually unnecessary to continue treatment with HYPERSTAT I.V. Injection for more than 4 to 5 days.
Since repeated administration of HYPERSTAT I.V. Injection can lead to sodium and water retention, administration of a diuretic may be necessary both for maximal blood pressure reduction and to avoid congestive heart failure. (See CLINICAL PHARMACOLOGY.)
Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.
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- Drug class: agents for hypertensive emergencies
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