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TARCEVA (erlotinib), a kinase inhibitor, is a quinazolinamine with the chemical name N-(3-ethynylphenyl)-6,7-bis(2-methoxyethoxy)4-quinazolinamine. TARCEVA contains erlotinib as the hydrochloride salt that has the following structural formula:
Erlotinib hydrochloride has the molecular formula C22H23N3O4.HCl and a molecular weight of 429.90. The molecule has a pKa of 5.42 at 25°C. Erlotinib hydrochloride is very slightly soluble in water, slightly soluble in methanol and practically insoluble in acetonitrile, acetone, ethyl acetate and hexane.
Aqueous solubility of erlotinib hydrochloride is dependent on pH with increased solubility at a pH of less than 5 due to protonation of the secondary amine. Over the pH range of 1.4 to 9.6, maximal solubility of approximately 0.4 mg/mL occurs at a pH of approximately 2.
TARCEVA tablets for oral administration are available in three dosage strengths containing erlotinib hydrochloride (27.3 mg, 109.3 mg and 163.9 mg) equivalent to 25 mg, 100 mg and 150 mg erlotinib and the following inactive ingredients: lactose monohydrate, hypromellose, hydroxypropyl cellulose, magnesium stearate, microcrystalline cellulose, sodium starch glycolate, sodium lauryl sulfate and titanium dioxide. The tablets also contain trace amounts of color additives, including FD&C Yellow #6 (25 mg only) for product identification.
What are the possible side effects of erlotinib (Tarceva)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop taking erlotinib and call your doctor at once if you have a serious side effect such as:
- new or worsening lung problems such as chest pain, dry cough with fever, wheezing, rapid breathing, feeling short of breath;
- chest pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;
- sudden numbness or weakness, sudden severe headache, or problems with vision, speech, or...
What are the precautions when taking erlotinib (Tarceva)?
Before taking erlotinib, tell your doctor or pharmacist if you are allergic to it; 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 disease, kidney problems, stomach/intestinal disease (such as ulcers, diverticulosis).
Use caution with sharp objects like safety razors or nail cutters and avoid activities such as contact sports to lower the chance of getting cut, bruised or injured.
This medicine may increase your risk of stomach bleeding. Limit alcoholic beverages.
Sunlight may worsen any skin reactions that may occur while you...
Last reviewed on RxList: 4/28/2014
This monograph has been modified to include the generic and brand name in many instances.
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