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Medicine (MD/DO)
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USMLE Step 2
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Gastroenterology
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Other Gastrointestinal Pharmacology
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Aprepitant

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Aprepitant

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Aprepitant

A-preppy-ant
DikeHAfifi
9 KEY FACTS
MECHANISM
Substance P Antagonist
Substance P Ant-toga

Aprepitant is a substance P antagonist. This drug blocks the interaction of substance P to bind neurokinin type 1 receptors. It will cause an antiemetic effect.

Inhibits NK1 (Neurokinin-1) Receptors in Brain
Inhibiting-chains Neuron-K-(1) Wand Receptor in Brain

Aprepitant works by blocking substance P to bind neurokinin type 1 receptors.

CLINICAL USE
Antiemetic
Ant-tie-medic

Aprepitant is used as an antiemetic agent due to its action on the neurotransmitter substance P/NK1 receptor that contributes to the pathogenesis of chemotherapy-induced nausea and vomiting. It also can be used to prevent postoperative nausea and vomiting (PONV) in adults.

Chemotherapy-induced Nausea and Vomiting
Chemo-head-wrap Vomiting

Aprepitant and steroids can be used as prophylaxis for delayed chemotherapy-induced nausea and vomiting. On the other hand, acute chemotherapy-induced nausea and vomiting are commonly treated with 5-HT3 antagonists and a corticosteroids. Nevertheless, aprepitant can be used on both conditions.

SIDE EFFECTS
Fatigue
Sleepy-guy

Fatigue is one of the most common side effects of Aprepitant.

Diarrhea
Toilet

Diarrhea is one of the most common side effects present from Aprepitant.

Constipation
Corked Con-toilet

Constipation is the most common side effect in adult patients taking Aprepitant to prevent postoperative nausea and vomiting (PONV).

Headache
Head-egg-lump

Headache can occur as a side effect of Aprepitant.

Anorexia
Anorexic-rex

Anorexia is one of the most common side effects of Aprepitant.

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