HYPOTENSION
NATRECOR® may cause hypotension and should be administered only in settings where blood pressure can be monitored closely. If hypotension occurs during administration of NATRECOR®, the dose should be reduced or discontinued. At the recommended dose of NATRECOR®, the incidence of symptomatic hypotension (4%) was similar to that of IV nitroglycerin (5%). Asymptomatic hypotension occurred in 8% of patients treated
with either drug. In some cases, hypotension that occurs with NATRECOR® may be
prolonged. The mean duration of symptomatic hypotension was longer with NATRECOR®
than IV nitroglycerin (2.2 versus 0.7 hours, respectively). NATRECOR® should not be used
in patients with systolic blood pressure <90 mm Hg or as primary therapy in patients with
cardiogenic shock. The rate of symptomatic hypotension may be increased in patients with a
baseline blood pressure <100 mm Hg, and NATRECOR® should be used cautiously in
these patients. In earlier trials, when NATRECOR® was initiated at doses higher
than the 2 mcg/kg bolus followed by a 0.01 mcg/kg/min infusion, the frequency, intensity,
and duration of hypotension were increased. The hypotensive episodes were also more often
symptomatic and/or more likely to require medical intervention.
NATRECOR® is not recommended for patients for whom vasodilating agents are not
appropriate and should be avoided in patients with low cardiac filling pressures.
RENAL
NATRECOR® may affect renal function in susceptible individuals. In patients
with severe heart failure whose renal function may depend on the activity of the
renin-angiotensin-aldosterone system, treatment with NATRECOR® may be associated
with azotemia. In the VMAC trial, through day 30, the incidence of elevations in creatinine
to >0.5 mg/dL above baseline was 28% and 21% in the NATRECOR® and nitroglycerin
groups, respectively. When NATRECOR® was initiated at doses higher than 0.01 mcg/kg/min,
there was an increased rate of elevated serum creatinine over baseline compared with standard
therapies, although the rate of acute renal failure and need for dialysis were not
increased.
MORTALITY
In 7 NATRECOR® clinical trials, through 30 days, 5.5% in the NATRECOR®
treatment group died as compared with 4.3% in the group treated with other standard
medications. In 5 clinical trials, through 180 days, 21.5% in the NATRECOR®
treatment group died as compared with 20.7% in the group treated with other medications.
There is not enough information to know if there is an increased risk of death after
treatment with NATRECOR®.