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EMEND (aprepitant) is a substance P/neurokinin 1 (NK1) receptor antagonist, chemically described as 5-[[(2R,3S)-2-[(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethoxy]-3-(4-fluorophenyl)-4-morpholinyl]methyl]-1,2-dihydro-3H-1,2,4-triazol-3-one.
Its empirical formula is C23H21F7N4O3, and its structural formula is:
Aprepitant is a white to off-white crystalline solid, with a molecular weight of 534.43. It is practically insoluble in water. Aprepitant is sparingly soluble in ethanol and isopropyl acetate and slightly soluble in acetonitrile.
Each capsule of EMEND for oral administration contains either 40 mg, 80 mg, or 125 mg of aprepitant and the following inactive ingredients: sucrose, microcrystalline cellulose, hydroxypropyl cellulose and sodium lauryl sulfate. The capsule shell excipients are gelatin, titanium dioxide, and may contain sodium lauryl sulfate and silicon dioxide. The 40-mg capsule shell also contains yellow ferric oxide, and the 125-mg capsule also contains red ferric oxide and yellow ferric oxide.
What are the possible side effects of aprepitant (Emend, Emend 2-Day, Emend 3-Day)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
- feeling like you might pass out;
- feeling very thirsty or hot, being unable to urinate, heavy sweating, or hot and dry skin; or
- fever, chills, body aches, flu symptoms, sores in your mouth and throat.
Less serious side effects may include:
- nausea, vomiting, heartburn, stomach...
What are the precautions when taking aprepitant capsules (Emend Capsules)?
Before using aprepitant, tell your doctor or pharmacist if you are allergic to it; or to fosaprepitant; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver problems.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
It is not known if this drug passes into breast milk. Consult your doctor before...
Last reviewed on RxList: 7/12/2012
This monograph has been modified to include the generic and brand name in many instances.
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