alirocumab

General

Pronunciation:
a-li-roe-kyoo-mab


Trade Name(s)

  • Praluent

Ther. Class.
lipid-lowering agents

Pharm. Class.
proprotein convertase subtilisin kexin type 9 (PCSK9) inhibitor antibodies

Indications

  • Lowering of low density lipoprotein cholesterol (LDL-C) as an adjunct to diet, as monotherapy or in combination with other lipid-lowering therapies (e.g. statin, ezetimibe) in patients with primary hyperlipidemia.
  • Reduction in risk of MI, stroke, and unstable angina requiring hospitalization in patients with established cardiovascular disease.

Action

A human monoclonal immunoglobulin (IgG1) produced in genetically engineered Chinese hamster ovary cells that binds to PCSK9 inhibiting its binding to the low density lipoprotein receptor (LDLR) resulting in ↑ number of LDLRs available to clear LDL from blood.

Therapeutic Effect(s):

  • ↓ LDL-C
  • Reduction in risk of MI, stroke, and unstable angina requiring hospitalization.

Pharmacokinetics

Absorption: Well absorbed (85%) following subcut administration.

Distribution: Mostly distributed in the circulatory system; crosses the placenta.

Metabolism and Excretion: Eliminated by binding to PCSK9 and by proteolytic degradation.

Half-life: 17–20 days.

TIME/ACTION PROFILE (effect circulating unbound PCSK9)

ROUTEONSETPEAKDURATION
subcutrapid4–8 hr2 wk

Contraindication/Precautions

Contraindicated in:

  • History of serious hypersensitivity to alirocumab.

Use Cautiously in:

  • Severe renal/hepatic impairment;
  • OB: Crosses the placenta, consider fetal risks;
  • Lactation: Consider benefits of breast feeding against possible risk to infant;
  • Pedi: Safety and effectiveness not established;
  • Geri: Elderly patients may be more sensitive to drug effects.

Adverse Reactions/Side Effects

CNS: confusion

Local: injection site reactions

Misc: serious allergic reactions (including vasculitis)

* CAPITALS indicate life-threatening.
Underline indicate most frequent.

Interactions

Drug-Drug

None noted.

Route/Dosage

SC (Adults) 75 mg every 2 wk; if desired LDL-C has not been achieved, may ↑ dose to 150 mg every 2 wk. If less frequent dosing desired, may initiate therapy with 300 mg every 4 wk; if desired LDL-C has not been achieved, may adjust dose to 150 mg every 2 wk. Patients undergoing apheresis–150 mg every 2 wk.

Availability

Solution for injection (prefilled pens or prefilled syringes): 75 mg/mL, 150 mg/mL

Assessment

  • Obtain a diet history, especially with regard to fat consumption.
  • Monitor for signs and symptoms of hypersensitivity reactions (pruritus, rash, urticaria, hypersensitivity vasculitis and hypersensitivity reactions requiring hospitalization) during therapy. If severe symptoms occur, discontinue alirocumab.

Lab Test Considerations:

Assess LDL-C levels within 4 to 8 wk of initiating or titrating alirocumab for patients taking every 2 wks or just before next dose for patients taking every 4 wks, to assess response and adjust dose, if needed.

Potential Diagnoses

Implementation

  • SC Allow solution to warm to room temperature for 30–40 min before injecting. May be kept at room temperature for up to 30 days. Solution is clear and colorless to pale yellow; do not administer solutions that are cloudy or contain particulate matter. Do not shake. Inject into thigh, abdomen, or upper arm. Rotate sites with each injection. Do not inject into areas with skin disease or injury (sunburns, rashes, inflammation, skin infections). Do not reuse prefilled pen or syringe. Do not administer other injectable drugs at same site. Store in refrigerator; keep in original container, protect from light. Do not freeze.
    • Administer 300 mg dose as two 150 mg injections in 2 different sites.

Patient/Family Teaching

  • Instruct patient in correct technique for self-injection, care and disposal of equipment. Administer missed doses within 7 days, then resume original schedule. If not administered within 7 days, wait until next dose on original schedule. Advise patient to read Patient Information before starting therapy and with each Rx refill in case of changes.
  • Advise patient that this medication should be used in conjunction with diet restrictions (fat, cholesterol, carbohydrates, alcohol), exercise, and cessation of smoking.
  • Instruct patient to notify health care professional of all Rx or OTC medications, vitamins, or herbal products being taken and to consult health care professional before taking any other Rx, OTC, or herbal products.
  • Advise patient to notify health care professional of medication regimen prior to treatment or surgery.
  • Rep: Advise patient to notify health care professional if pregnancy is planned or suspected or if breast feeding. Encourage pregnant women to enroll in the pregnancy exposure registry that monitors pregnancy outcomes in women exposed to alirocumab during pregnancy by calling 1-877-311-8972 or go to https://mothertobaby.org/ongoing-study/praluent/ to enroll in or to obtain information about registry.

Evaluation/Desired Outcomes

↓ LDL-C levels.

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