Primacor Side Effects

Generic name: milrinone

Note: This document contains side effect information about milrinone. Some of the dosage forms listed on this page may not apply to the brand name Primacor.

Some side effects of Primacor may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

For the Consumer

Applies to milrinone: intravenous solution

Get emergency medical help if you have any of these signs of an allergic reaction while taking milrinone (the active ingredient contained in Primacor) hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Tell your caregivers at once if you have a serious side effect such as:

• chest pain;

• feeling like you might pass out;

• bronchospasm (wheezing, chest tightness, trouble breathing); or

• low potassium (confusion, uneven heart rate, extreme thirst, increased urination, leg discomfort, muscle weakness or limp feeling).

Less serious side effects of milrinone may include:

• headache;

• tremors; or

• easy bruising or bleeding.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

For Healthcare Professionals

Applies to milrinone: intravenous solution

Cardiovascular

Cardiovascular side effects have included ventricular arrhythmias (12%), ventricular ectopic activity (8%), supraventricular arrhythmias (3.8%), sustained and nonsustained ventricular tachycardia (1% and 2.8%, respectively), ventricular fibrillation (0.2%), and atrial fibrillation. Hypotension (2.9%) and angina/chest pain (1.2%) have occurred. In addition, rare reports of torsades de pointes have been reported in postmarketing experience.

Nervous system

Nervous system side effects have included headaches (2.9%) and tremor (0.4%). Dizziness is most often associated with hypotension.

Hematologic

Hematologic side effects of reversible thrombocytopenia (0.4%), inhibition of platelet activity, and increased bleeding time have occurred. While these effects have been described in patients undergoing cardiac surgery who had received milrinone (the active ingredient contained in Primacor) for 12 to 24 hours, they have not been associated with acute administration of milrinone. The hematologic side effects of milrinone may be important in some patients who are awaiting cardiac catheterization, transplant, or other significant invasive procedures.

Milrinone has been shown to inhibit human platelet thromboxane A2 synthesis and calcium uptake.

Gastrointestinal

General gastrointestinal complaints have been reported rarely.

Hypersensitivity

Hypersensitivity reactions including rare instances of bronchospasm and anaphylactic shock have been reported in postmarketing experience.

Hepatic

Hepatic side effects including liver function test abnormalities have been reported in postmarketing experience.

Other

Other side effects including rash and skin reactions have been reported in postmarketing experience.

Metabolic

Metabolic side effects have included rare reports of hypokalemia (0.6%).

Respiratory

Respiratory side effects have been reported including isolated, spontaneous reports of bronchospasm.

Dermatologic

Dermatologic side effects including rash has been reported in postmarketing experience.

Local

Local side effects including infusion site reaction has been reported in postmarketing experience.

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