emtricitabine


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Related to emtricitabine: efavirenz, lamivudine, Tenofovir

emtricitabine

Emtriva

Pharmacologic class: Nucleoside reverse transcriptase inhibitor

Therapeutic class: Antiretroviral

Pregnancy risk category B

FDA Box Warning

• Drug has caused lactic acidosis and severe hepatomegaly with steatosis (including fatal cases) when used alone or in combination with other antiretrovirals.

• Drug isn't indicated for chronic hepatitis B virus (HBV) infection. Safety and efficacy haven't been established in patients co-infected with HBV and human immunodeficiency virus (HIV). Discontinuation has led to severe acute HBV exacerbations. Monitor hepatic function closely.

Action

Inhibits activity of HIV-1 reverse transcriptase by competing with natural substrate and by its incorporation into nascent viral DNA, thereby halting viral replication

Availability

Capsules: 200 mg

Oral solution: 10 mg/ml in 170-ml bottles

Indications and dosages

HIV-1 infection, with other antiretrovirals

Adults ages 18 and older: 200-mg capsule P.O. daily or 240 mg (24 ml) oral solution P.O. once daily

Children ages 3 months to 17 years weighing more than 33 kg (73 lb): 200-mg capsule P.O. once daily

Children ages 3 months to 17 years weighing less than 33 kg (73 lb): 6 mg/kg oral solution P.O. daily to maximum of 240 mg (24 ml) once daily

Children ages 0 to 3 months: 3 mg/kg oral solution P.O. once daily

Dosage adjustment

• Renal impairment

Contraindications

• Hypersensitivity to drug or its components

Precautions

Use cautiously in:
• renal impairment
• increased risk for lactic acidosis or hepatic impairment
• obese patients
• elderly patients
• children (safety and efficacy not established).

Administration

• Give with or without food.
• Know that drug must be given with other antiretrovirals.
• Know that capsule can be given to child weighing more than 33 kg if child can swallow an intact capsule.

Adverse reactions

CNS: dizziness, headache, insomnia, abnormal dreams, depression, peripheral neuritis or neuropathy, paresthesia

EENT: rhinitis

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

Hepatic: hepatotoxicity

Metabolic: cushingoid appearance (buffalo hump, moon face),lactic acidosis

Musculoskeletal: joint pain, myalgia

Respiratory: increased cough

Skin: rash, skin discoloration (hyperpigmentation on palms and soles)

Other: body fat redistribution

Interactions

Drug-drug.Tenofovir disoproxil fumarate: increased emtricitabine effect

Drug-diagnostic tests.Alanine aminotransferase, amylase, aspartate aminotransferase, bilirubin, creatine kinase, lipase, triglycerides: increased levels

Glucose: increased or decreased level

Neutrophils: decreased count

Patient monitoring

Monitor closely (especially in females and obese patients) for signs and symptoms of lactic acidosis and hepatotoxicity, even if patient doesn't have marked transaminase elevations.
• Assess neurologic status, checking especially for depression, peripheral neuropathy, and paresthesia.
• Monitor neutrophil count, lipid panel, liver function tests, and blood glucose level.

Monitor patient closely for several months after drug withdrawal. Severe, acute exacerbations of hepatitis B virus (HBV) have been reported after discontinuation in patients co-infected with HBV and HIV.
• Monitor nutritional and hydration status in light of GI adverse effects and underlying disease.
• Watch for cushingoid appearance and body fat redistribution.

Patient teaching

• Tell patient to take a missed dose as soon as he remembers. However, if it's almost time for next dose, tell him to skip the missed dose and take next dose as scheduled.

Instruct patient not to change dosage or stop taking drug unless prescriber approves.
• Tell patient drug should be taken only in combination with other drugs that treat HIV.

Instruct patient not to take this drug if already taking Altripla (combination of efavirenz, emtricitabine, and tenofovir), Combivir (combination of lamivudine and zidovudine), Epivir (lamivudine), Epzicom (combination of abacavir and lamivudine), Trizivir (combination of abacavir, lamivudine, and zidovidine), or Truvada (combination of emtricitabine and tenofovir), because these drugs contain the same or similar ingredients.

Tell patient to immediately report signs or symptoms of lactic acidosis-unusual tiredness or muscle pain, difficulty breathing, stomach pain with nausea and vomiting, coldness, dizziness or light-headedness, or fast or irregular heartbeat.

Instruct patient to immediately report signs or symptoms of liver problems-unusual tiredness, yellowing of skin or eyes, dark urine, lightcolored feces, appetite loss, nausea, or pain in lower abdominal area.
• Advise patient to report adverse CNS reactions and to use good judgment about driving and other hazardous activities.
• Caution patient that drug may cause depression. Tell him to notify prescriber if he develops symptoms.
• Inform patient that drug may cause body fat redistribution, dark areas on palms and soles, and rash.
• Tell female patient to inform prescriber if she is pregnant or plans to become pregnant.
• Caution HIV-positive patient not to breastfeed.
• As appropriate, review all other significant and life-threatening adverse reactions and interactions, especially those related to the drugs and tests mentioned above.

emtricitabine

(ĕm′trĭ-sĭt′ə-bēn′, -sī′tə-)
n.
An antiviral drug, C8H10FN3O3S, that is a nucleoside reverse transcriptor inhibitor and is used in combination with other drugs to treat HIV infection or to reduce the risk of HIV infection.

emtricitabine

a retroviral.
indication This drug is used with other retrovirals to treat HIV infection.
contraindication Known hypersensitivity to this drug prohibits its use.
adverse effects Adverse effects of this drug include headache, abnormal dreams, depression, dizziness, insomnia, neuropathy, paresthesia, arthralgia, myalgia, cough, change in body fat distribution, rash, and skin discoloration. Common side effects include nausea, vomiting, diarrhea, anorexia, abdominal pain, and dyspepsia.

emtricitabine

A synthetic analogue of cytosine that acts as an inhibitor of HIV reverse transcriptase. The drug is taken once a day in combination with other antiretroviral drugs to treat HIV infection. It is also active against the hepatitis B virus.
References in periodicals archive ?
Under the new agreements, Gilead will provide a technology transfer for the manufacture of Emtricitabine, together with funding to assist with investment in process improvements to reduce manufacturing costs.
So for example I think we've come to believe--whether it's true or not (2-4)--that using lamivudine or emtricitabine in a regimen to maintain the M184V mutation is probably of some virologic benefit.
The aim of this study carried out by Benjamin Chi and colleagues in Lusaka, Zambia, was to see if this complication could be reduced by the introduction of a single peripartum dose of tenofovir and emtricitabine.
Three-year safety and efficacy of emtricitabine (FTC)/tenofovir DF (TDF) and efavirenz (EFV) compared to fixed dose zidovudine/lamivudine (CBV) and EFV in antiretroviral treatment-naA[macron]ve patients.
Obviously now I would not use lamivudine, entecavir, or emtricitabine in any coinfected patient in whom I am not treating HIV," said Dr.
The drugs in the preferred protease-inhibitor (PI)-based regimen are lopinavir and ritonavir (coformulated as Kaletra) plus zidovudine plus either lamivudine or emtricitabine.
Recently, antiretroviral therapy used as oral pre-exposure prophylaxis (PrEP) has been shown to be effective in three large trials using daily tenofovirl emtricitabine or tenofovir in gay and bisexual men and transgender women (iPrEx), heterosexual HIV-serodiscordant couples (Partners PrEP), and heterosexual men and women (TDF2)," wrote Dr.
The study has demonstrated that individuals at high risk for HIV infection who took a daily tablet containing an HIV medication, either the antiretroviral medication tenofovir or tenofovir in combination with emtricitabine, experienced significantly fewer HIV infections than those who received a placebo pill.
The FDA approves Truvada, a fixed-dose, once-daily, co-formulation of the NRTIs emtricitabine (Emtriva, FTC) and tenofovir (Viread).
The drugs in the preferred nonnucleoside reverse transcriptase inhibitor (NNRTI)-based regimen are efavirenz plus either lamivudine or emtricitabine plus either zidovudine or tenofovir Efavirenz should be avoided in pregnant women or women of childbearing potential.
Stribild combines four compounds in one daily tablet: elvitegravir, an integrase inhibitor; cobicistat, a pharmacoenhancing agent; emtricitabine and tenofovir disoproxil fumarate.