efavirenz

(redirected from Stocrin)
Also found in: Dictionary.

efavirenz

 [ef´ah-vi″renz]
a non-nucleoside reverse transcriptase inhibitor, used as an antiretroviral in treatment of human immunodeficiency virus infection; administered orally.

efavirenz

Sustiva

Pharmacologic class: Nonnucleoside reverse transcriptase inhibitor

Therapeutic class: Antiretroviral

Pregnancy risk category D

Action

Inhibits human immunodeficiency virus (HIV) reverse transcriptase (required for transcription of HIV-1 RNA to DNA), leading to viral cell death

Availability

Capsules: 50 mg, 200 mg

Tablets: 600 mg

Indications and dosages

HIV infection (given with one or more additional antiretrovirals)

Adults and children older than age 3 and weighing more than 40 kg (88 lb): 600 mg P.O. once daily

Children weighing 32.5 to 40 kg (71.5 to 88 lb): 400 mg P.O. once daily

Children weighing 25 to 32.5 kg (55 to 71.5 lb): 350 mg P.O. once daily

Children weighing 20 to 25 kg (44 to 55 lb): 300 mg P.O. once daily

Children weighing 15 to 20 kg (33 to 44 lb): 250 mg P.O. once daily

Children weighing 10 to 15 kg (22 to 33 lb): 200 mg P.O. once daily

Dosage adjustment

• Concurrent use of rifampin or voriconazole

Contraindications

• Hypersensitivity to drug
• Concurrent use of astemizole, cisapride, midazolam, triazolam, ergot derivatives, voriconazole, or bepridil

Precautions

Use cautiously in:
• hypercholesterolemia, hepatic impairment, concurrent use of hepatotoxic drugs, mental illness, or substance abuse
• concurrent use of St. John's wort (use not recommended)
• pregnant or breastfeeding patients
• children.

Administration

• Give on empty stomach.
• Know that drug is given with other antiretrovirals.

Adverse reactions

CNS: dizziness, drowsiness, fatigue, insomnia, abnormal dreams, hypoesthesia, depression, headache, poor concentration, nervousness, anxiety, CNS depression, suicidal ideation

CV: arrhythmias

GI: nausea, diarrhea, flatulence, abdominal pain, dyspepsia

GU: hematuria, renal calculi

Hepatic: hepatotoxicity

Respiratory: respiratory depression

Skin: rash, diaphoresis, pruritus,erythema multiforme, toxic epidermal necrolysis, Stevens-Johnson syndrome

Other: increased appetite

Interactions

Drug-drug.Azole antifungals (ketoconazole, voriconazole): decreased antifungal plasma concentration, increased efavirenz plasma concentration

Calcium channel blockers: possible decreased calcium channel blocker concentration

Clarithromycin, indinavir: reduced blood levels of these drugs

CNS depressants (including antidepressants, antihistamines, opioids): increased CNS depression

CYP450 inducers (including phenobarbital, rifabutin, rifampin): increased clearance and decreased blood level of efavirenz

CYP450 inhibitors, ergot alkaloids, estrogen, midazolam, ritonavir, triazolam: increased blood levels of these drugs, greater risk of serious adverse reactions (including arrhythmias, CNS and respiratory depression, and hepatotoxicity)

HMG-CoA reductase inhibitors: decreased plasma concentration of atorvastatin, pravastatin, and simvastatin

Hormonal contraceptives: increased ethinyl estradiol blood level

Protease inhibitors: decreased plasma level and efficacy of these drugs

Saquinavir: decreased saquinavir blood level

Warfarin: increased or decreased warfarin effects

Drug-diagnostic tests.Alanine aminotransferase, aspartate aminotransferase, gamma-glutamyltransferase, total cholesterol, triglycerides: increased levels

Urine cannabinoid test: false-positive result

Drug-food.High-fat meal: increased drug absorption

Drug-herbs.St. John's wort: decreased efavirenz blood level and efficacy, drug resistance

Drug-behaviors.Alcohol use: increased CNS depression

Patient monitoring

• Monitor dietary intake and hepatic and lipid profile.
• Closely monitor patients with hepatic failure.

Record mood changes and stay alert for suicidal ideation or behavior.
• Be aware that drug may cause hypercholesterolemia.
• Know that amount of HIV in blood may increase if patient stops drug therapy even briefly.

Patient teaching

• Instruct patient to take with full glass of water, preferably at bedtime to improve tolerance of CNS effects. Also tell him to avoid taking drug with high-fat meals.
• Inform patient that drug must be taken in combination with other antiretrovirals.
• Tell patient that drug doesn't cure HIV or AIDS and that he can still transmit virus to others.

Advise patient to report suicidal thoughts and other psychiatric symptoms.
• Caution patient to avoid driving and other hazardous activities until he knows how drug affects concentration and alertness.

Tell female patient to immediately inform prescriber if she becomes pregnant.
• Advise female patient to use adequate contraceptive measures for 12 weeks after discontinuing drug.
• As appropriate, review all other significant and life-threatening adverse reactions and interactions, especially those related to the drugs, tests, foods, herbs, and behaviors mentioned above.

efavirenz

/ef·a·vi·renz/ (ef´ah-vi″renz) an antiretroviral, inhibiting reverse transcriptase; used in the treatment of HIV infection.

efavirenz

(ə-fä′vîr-ĕnz′)
n.
An antiviral drug, C14H9ClF3NO2, that is a non-nucleoside reverse transcriptase inhibitor and is used in combination with other drugs for the treatment of HIV infection.

efavirenz

an antiviral.
indications It is used to treat HIV-1 in combination with other antiretroviral agents.
contraindications Known hypersensitivity to this drug prohibits its use.
adverse effects Adverse effects include abdominal pain, headache, dizziness, fatigue, impaired concentration, insomnia, abnormal dreams, and depression. Common side effects include diarrhea, nausea, and rash.

efavirenz

Sustiva AIDS A reverse transcriptase inhibitor used with other antivirals–eg, zidovudine, lamivudine for HIV-1 infection Adverse effects N&V, maculopapular rash, fatigue, headache, dizziness. See Non-nucleoside reverse transcriptase inhibitor.

efavirenz

A non-nucleoside reverse transcriptase inhibitor used, in combination with other antiretroviral drugs, to treat HIV infections. The drug is on the WHO official list. A brand name is Sustiva.
References in periodicals archive ?
The South African guidelines rely on the 2004 approved package insert for Stocrin, which the Medicines Control Council (MCC) believes indicates an absolute bar on the use of efavirenz throughout pregnancy.
If indeed there is a concern about neural tube defects, the appropriate guideline response should be to focus on the avoidance of conception in women on efavirenz in line with the WHO recommendations and the prescriber information that accompanies efavirenz when distributed as Stocrin.
Merck has attempted to negotiate in good faith with the Government of Brazil, but a fair offer on Stocrin [the brand name for efavirenz] has been rejected," the company said in a statement.
Under Decree 4,830/2003, Brazil allows compulsory licensing in cases of national emergency or public interest; Brazil issued its first compulsory licence in May 2007, for Merck Sharp & Dohme's Stocrin (efavirenz).
Other reported products is comprised of: ARCOXIA, CANCIDAS, COSOPT, CRIXIVAN, EMEND, FOSAMAX, INVANZ, ISENTRESS, MAXALT, PRIMAXIN, PROPECIA, PROSCAR, STOCRIN, TIMOPTIC/TIMOPTIC XE, TREDAPTIVE, TRUSOPT, VASOTEC/VASERETIC, ZOCOR and ZOLINZA.
Other reported products comprise: ARCOXIA, CANCIDAS, COSOPT, CRIXIVAN, EMEND, FOSAMAX, INVANZ, ISENTRESS, MAXALT, PRIMAXIN, PROPECIA, PROSCAR, STOCRIN, TIMOPTIC/TIMOPTIC XE, TRUSOPT, VASOTEC/VASERETIC, ZOCOR and ZOLINZA.
Other reported products comprise: ARCOXIA, CANCIDAS, COSOPT, CRIXIVAN, EMEND, INVANZ, ISENTRESS, JANUVIA, JANUMET, MAXALT, PRIMAXIN, PROPECIA, PROSCAR, STOCRIN, TIMOPTIC/TIMOPTIC XE, TRUSOPT, VASOTEC/VASERETIC, ZOCOR and ZOLINZA.
Activists Vow to Continue Fight for Affordable Lifesaving AIDS Drugs; Question Why Despite Merck's Price Cut Today, Stocrin Costs Only 50 Cents per Day in Brazil While Mexico Will Pay $1.
Merck cut its price of Stocrin (efavirenz, branded as Sustiva in the US) in Mexico by 40% from 777 pesos per patient monthly to 468 pesos (roughly from $77.
The efforts of some very passionate AIDS activists are paying off in Mexico with Merck's announcement of significant price cuts on two of its AIDS drugs, Stocrin and Isentress," said Michael Weinstein, AIDS Healthcare Foundation President.