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Sustiva (Efavirenz)

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Sustiva is used to treat HIV infection in combination with other anti-HIV medications. If Sustiva is the only drug you take to treat HIV infection, it may stop working.

Other names for this medication:
Adiva, Avifanz, Aviranz, Ciplaefavir, Efatec, Efavir, Efavirenz, Efavirenzum, Filginase, Stocrin, Stocrit, Sulfinav, Virorrever, Virzen, Efcure, Efferven, Efamat, Viranz, Effahope, Evirenz, Estiva

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Combivir, Epivir, Retrovir, Zerit, Viramune, Viramune XR, Rescriptor, Delavirdine, Nevirapine, Edurant, Truvada, Atripla, Norvir , Isentress, Prezista, Reyataz, Complera, Epzicom, Stribild, Epivir, Kaletra, Viread, Intelence, lamivudine, Ziagen, Ritonavir, Abacavir , Raltegravir, Tenofovir, Tivicay, Crixivan

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Also known as:  Efavirenz.


Sustiva is used to treat HIV infection in combination with other anti-HIV medications. If Sustiva is the only drug you take to treat HIV infection, it may stop working.

Sustiva is an oral medication that is used for the treatment of infections with the human immunodeficiency virus (HIV). It is similar to nevirapine (Viramune) and delavirdine (Rescriptor).

Sustiva is also known as Efavirenz, Stocrin.

Sustiva is in a class of drugs called reverse transcriptase inhibitors which also includes zalcitabine (Hivid), zidovudine (Retrovir), didanosine (Videx), and lamivudine (Epivir). During infection with HIV, the HIV virus multiplies within the body's cells. The newly-formed viruses then are released from the cells and spread throughout the body where they infect other cells. In this manner, the infection continually spreads to new, uninfected cells that the body is continually producing, and HIV infection is perpetuated. When producing new viruses, the HIV virus must manufacture new DNA for each virus. Reverse transcriptase is the enzyme that the virus uses to form this new DNA. Sustiva directly inhibits the activity of reverse transcriptase and blocks the production of DNA and new viruses. Unlike zidovudine, efavirenz does not need to be converted to an active form. Sustiva does not kill existing HIV virus and it is not a cure for HIV.


Take this drug by mouth, generally once daily as directed. Take on an empty stomach with a glass of water. Taking Sustiva with food, especially a high-fat meal can lead to increased blood levels of the drug and increase your risk of having side effects.

Best taken at bedtime during the first month of use. Using this drug regularly at bedtime may decrease certain side effects. Use this medication regularly in order to get the most benefit from it. To help you remember, use it at the same time each day. Do not take more or less of this drug than prescribed, or stop taking it unless directed to do so by your doctor. Read the patient information leaflet provided by your pharmacist.

If you want to achieve most effective results do not stop taking Sustiva suddenly.


If you overdose Sustiva and you don't feel good you should visit your doctor or health care provider immediately.


Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F) away from moisture and heat. Throw away any unused medicine after the expiration date. Keep out of the reach of children.

Side effects

The most common side effects associated with Sustiva are:

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Do not take Sustiva if you are allergic to Sustiva components.

Do not take Sustiva if you are pregnant, planning to become pregnant, or are breast-feeding. It is unknown if Sustiva is excreted in breast milk. Avoid breast-feeding because breast milk can transmit HIV.

Be careful with Sustiva if you have mental disorders, liver disease (such as hepatitis).

Avoid machine driving.

Limit alcohol intake, as it may intensify drug side effects.

It can be dangerous to stop Sustiva taking suddenly.

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The availability of buprenorphine (BUP) provides an alternative approach to the treatment of opioid addiction with methadone, an agent that has many drug-drug interactions when combined with antiretroviral therapy (ART). However, due to limited long-term pharmacokinetic studies in HIV-infected patients, the clinical use of BUP, a CYP450-3A4 substrate, will require that studies be conducted to examine safety, tolerability and pharmacokinetics when these drugs are taken for chronic treatment. One clinical approach could include plasma concentration monitoring to avoid under- or overdosing BUP secondary to drug interactions with ART. The measurement of BUP and its active metabolite, norbuprenorphine (NBUP) facilitates the addition of BUP to ART in an attempt to avoid drug toxicity as described in a recent report by Bruce et al. Therefore, our objective was to validate a BUP assay and integrate its application into an ongoing antiretroviral (ARV) plasma concentration monitoring program. A chromatographic method for monitoring BUP and its active metabolite, NBUP was investigated. An assay was developed that would facilitate BUP and ARV measurement from a single 3 mL blood sample (0.75 mL plasma required) in conjunction with a previously validated multiple ARV HPLC method. The method measures BUP and NBUP over the range from 0.25 to 50 ng/mL with mass spectrometry detection. Inter- and intra-assay variation was

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In the three patent applications, the impact of changing the pyrimidine core of the rilpivirine (RPV) to a variety of alternative fused cores was explored, culminating in the identification of a series of conformationally restricted compounds with comparable potencies against WT and mutant HIV-1 strains with those of efavirenz (EFV) and RPV, and higher security in the Human Ether-a-go-go-Related Gene (hERG) assay. Areas covered: The present review provides a fused pyrimidine and isoquinoline derivatives as potent HIV-1 NNRTIs, and highlights the conformational restriction strategies in the development of NNRTIs. Expert opinion: The molecular docking analysis of the newly synthesized compounds maintain the classical horseshoe conformation and shares similar binding mode with RPV. The conformational restriction strategies have greatly accelerated the optimization of the DAPY NNRTIs and contribute to finding new chemical entities (NCEs) with favorable druggability.

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The World Health Organization Antiretroviral Treatment Guidelines recommend phasing-out stavudine because of its risk of long-term toxicity. There are two mutational pathways of stavudine resistance with different implications for zidovudine and tenofovir cross-resistance, the primary candidates for replacing stavudine. However, because resistance testing is rarely available in resource-limited settings, it is critical to identify the cross-resistance patterns associated with first-line stavudine failure.

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The prescription of patients' tailored anti-infectious treatments is the ultimate goal of pharmacogenetics/genomics applied to antimicrobial treatments, providing a basis for personalized medicine. Despite the efforts to screen Africans for alleles underlying defective metabolism for a panel of different drugs, still more research is necessary to clarify the interplay between host genetic variation and treatments' response. HIV is a major infectious disease in sub-Saharan African countries, and the main prescribed anti-HIV combination therapy includes efavirenz (EFV) or nevirapine (NVP). The two drugs are both mainly metabolised by cytochrome P450 2B6 liver enzyme (CYP2B6). Defective variants of CYP2B6 gene, leading to higher drug exposure with subsequent possible side effects and low compliance, are well known. However, little is known about CYP2B6 alleles in Cameroon where only one study was done on this subject. The main objective of the present work is to assess, in a subset of HIV-exposed subjects from Dschang in West Cameroon, the prevalence of two SNPs in the CYP2B6 gene: 516G>T (rs3745274) and 983T>C (rs28399499), both associated to a defective EFV and NVP metabolism. We analyzed 168 DNA samples collected during two cross-sectional surveys performed in Dschang, West Cameroon. In the population studied the observed allele frequencies of 516G>T and 983T>C were 44.35% (95%CI, 36.84-51.86%) and 12.80% (95%CI, 7.75-17.85%), respectively. Moreover, concerning the CYP2B6 expected phenotypes, 28.57% of the population showed a poor metaboliser phenotype, while 27.38% and 44.05% showed an extensive (wild-type) and an intermediate metaboliser phenotype, respectively. Here we found that an important fraction of the subjects is carrying EFV/NVP poor metaboliser alleles. Our findings could help to improve the knowledge about the previewed efficacy of anti-HIV drug therapy in Cameroon. Finally, we designed a new method of detection for the 983T>C genetic variation that can be applied in resource-limited laboratories.

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These guidelines are part of the French Experts' recommendations for the management of people living with HIV/AIDS, which were made public and submitted to the French health authorities in September 2013. The objective was to provide updated recommendations for antiretroviral treatment (ART) of HIV-positive adults. Guidelines included the following topics: when to start, what to start, specific situations for the choice of the first session of antiretroviral therapy, optimization of antiretroviral therapy after virologic suppression, and management of virologic failure.

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The FDA recently approved efavirenz (Sustiva, DMP 266), which is a powerful anti-HIV drug when used in combination therapy. Efavirenz is believed to be as potent as Indinavir in many cases. Testing positive for marijuana use is a possible side effect of using efavirenz, but this false positive can be verified with a test that uses gas chromatography.

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To evaluate the effects of ketoconazole, rifampicin and efavirenz on the pharmacokinetics of telaprevir in healthy volunteers.

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Buprenorphine/naloxone alone and often in the presence of evidence for recent use of cocaine did not significantly alter the QT interval (p = 0.612). Buprenorphine/naloxone in combination with ARVs caused a statistically, but not clinically, significant increase (p = 0.005) in the QT interval. Subjects receiving buprenorphine/naloxone in combination with either delavirdine or ritonavir had the greatest increase in QTc intervals.

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Antiretroviral-naive men (n=213) were randomized to receive nelfinavir, efavirenz, or both plus either zidovudine and lamivudine or stavudine and didanosine. Patients underwent measurements of metabolic parameters, including determination of free testosterone level by equilibrium dialysis and bioelectrical impedance analysis, over a 64-week period.

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sustiva drug test 2016-01-30

Several new anti-HIV drugs show great promise in future treatments. Nelfinavir, especially effective in combination with AZT and 3TC, is a new protease inhibitor Cardura Xl Drug with fewer and milder side effects than other protease inhibitors. GW-1592 is a new nucleoside analogue that appears to be more effective than earlier ones in reducing HIV viral loads with minimal side effects. Other news drugs, GW-141U89, DMP-266, ABT-378, and MKC-442, are entering clinical trials. Scientists are considering converting HIV therapy into a specialty due to the complications, such as resistance, tolerance, and the need for compliance, of using these products.

sustiva 600 mg 2015-08-04

One hundred and seventeen patients who attended our clinic for routine blood tests, and who were receiving antiretroviral therapy which included NNRTI or PI were studied. Patients were not informed that drug concentrations were going to be measured until blood sampling. The times of the last antiretroviral dose and of blood Viagra Canada Cheap sampling were recorded. Drug concentrations were considered optimal if they were above the proposed minimum effective value. In addition, efavirenz, nevirapine and atazanavir concentrations were considered potentially toxic if they were > 4.0 mg l(-1), > 6.0 mg l(-1) and > 0.85 mg l(-1), respectively.

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Pregnant women with HIV exposed Combivir Generic Cost to antiretroviral treatment at any time during pregnancy.

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Sustiva (DMP 266 or efavirenz) has been available on an expanded access program since October 1. Sustiva is a non-nucleoside reverse transcriptase inhibitor, has fewer side effects than other drugs of its class, and is taken once a day at bedtime. Criteria for the program are T4 counts under 50 in patients whose current therapy is not working. Adefovir dipivoxil (bis-POM PMEA or Preveon) is a nucleotide analog that is also available through an expanded access program. Adefovir's properties make it less vulnerable to resistance. It is not as potent as other drugs Propecia Online Uk of the same class; however, its effect seems to last longer. It is also effective against some herpesviruses and hepatitis B. Contact information is provided for both programs.

sustiva drug interactions 2016-08-16

We developed a simple HPLC method for the simultaneous quantitative determination of seven HIV protease inhibitors: amprenavir (APV), atazanavir (ATV), indinavir (IDV), lopinavir (LPV), nelfinavir (NFV), ritonavir (RTV), saquinavir (SQV), and a nonnucleoside reverse transcription inhibitor, efavirenz (EFV). This method involves a rapid liquid-liquid drug extraction from plasma, the use of an isocratic elution on a reversed- Oxytrol Medicine phase C18 column, and an ultraviolet detection at a single wavelength (205 nm). The mobile phase consisted of 39% 50 mM phosphate buffer (pH 5.9), 22% methanol and 39% acetonitrile. Forty-eight samples could be measured in one day since the runtime of one sample is 30 min. The assay has been validated over a concentration range of 0.05 to 12.20 microg/ml for APV, 0.09 to 12.05 microg/ml for ATV, 0.05 to 12.01 microg/ml for IDV, 0.12 to 12.36 microg/ml for LPV, 0.18 to 12.20 microg/ml for NFV, 0.12 to 12.33 microg/ml for RTV, 0.12 to 12.06 microg/ml for SQV, and 0.05 to 12.17 microg/ml for EFV. Calibration curves were linear in the described concentration ranges. The average accuracy ranged from 97.2 to 106.8%. Both the interday and intraday coefficients of variation for all drugs tested were less than 8.5%. This method provides a simple, accurate, and precise method for the therapeutic drug monitoring of the seven protease inhibitors and EFV in clinical routine use.

sustiva renal dosing 2015-04-22

HIV/AIDS was the subject of some of the presentations at the annual meeting Risperdal Generic of the Infectious Diseases Society of America (ISDA). The most significant presentation was by Dr. Anthony Fauci, who described the possibility of using IL-2 to purge latently-infected CD4 cells. Other presentations covered treatment of primary HIV infection, updates on developments of nucleoside inhibitors, an efavirenz (EFV) update, PCP prophylaxis, care delivery options, and co-infection with tuberculosis.

sustiva dosing 2015-05-27

We explored the mean differences in routinely measured lipids (total cholesterol, triglycerides, and high-density lipoprotein cholesterol) according to exposure to different combination antiretroviral regimens in Asian (n = 2051) and Australian (predominantly Caucasian, n = 794) cohorts. The regimen was defined as at least 3 antiretroviral drugs with at least 2 nucleoside-reverse transcriptases (NRTIs) and either of at least one protease inhibitor (PI) or non-nucleoside-reverse transcriptases (NNRTIs). We categorised cART regimens as: NRTIs as tenofovir based or not; NNRTIs as nevirapine or efavirenz (but not both); and PI as atazanavir based or not. We found that the Cymbalta Canada Generic impact of various antiretroviral regimens on lipids in Asian and Australian cohorts was only different by cohort for total cholesterol (P for interaction between regimen and cohort: <0.001) but not in case of other lipids (P for interaction: >0.05). The differences in total cholesterol were however small and unlikely to be of clinical significance. Overall, tenofovir with nevirapine or atazanavir was associated with the most favorable lipids, while the PI regimens without tenofovir and atazanavir were associated with least favorable lipids. We conclude that the impact of various ART regimens on lipids is largely similar in Asian and Australian cohorts and that the newer drugs such as tenofovir and atazanavir are likely to provide similar benefit in terms of lipid profiles in both populations.

sustiva tablet 2017-12-16

Eight hundred and one patients from seven sites participated in the study. One hundred and thirteen patients (14.1%) had VL >500 copies/ml. Most Propecia Name Brand patients were treated with lamivudine along with zidovudine or stavudine and efavirenz or nevirapine. Genotypes were available for 46 patients. The predominant HIV-1 subtypes were CRFO2_AG in 26 (56.5%) and AGK/K/AK in 12 (26.1%) patients. The prevalence of drug resistance mutations by class were as follows for nucleoside reverse transcriptase inhibitors: 1841/V (82.6%), 215Y/F (32.6%), 219E/Q (19.6%), 70R (19.6%), 67N (21.7%), 41L (15.2%) and 151M(2.2%). For non-nucleoside reverse transcriptase inhibitors the prevalence was: 103N (50%) and 181C/I (19.6%). Phylogenetic analysis showed that, although the genetic distances were small among isolates, there was no clustering of a particular subtype in a specific region and that the high prevalence of AGK subtype in our drug-resistant population was not due to a circulating resistant strain.

sustiva cost 2016-12-27

Virological failure is less likely with efavirenz regardless of the CD4(+) T-cell count when starting therapy. Immunological failure is also less likely with efavirenz; however, this advantage disappears if patients start therapy with a low CD4(+) T-cell count.

sustiva pill 2016-12-31

We reviewed all GenBank submissions of HIV-1 reverse transcriptase sequences with or without protease and identified 287 studies published between March 1, 2000, and December 31, 2013, with more than 25 recently or chronically infected ARV-naïve individuals. These studies comprised 50,870 individuals from 111 countries. Each set of study sequences was analyzed for phylogenetic clustering and the presence of 93 surveillance drug-resistance mutations (SDRMs). The median overall TDR prevalence in sub-Saharan Africa (SSA), south/southeast Asia (SSEA), upper-income Asian countries, Latin America/Caribbean, Europe, and North America was 2.8%, 2.9%, 5.6%, 7.6%, 9.4%, and 11.5%, respectively. In SSA, there was a yearly 1.09-fold (95% CI: 1.05-1.14) increase in odds of TDR since national ARV scale-up attributable to an increase in non-nucleoside reverse transcriptase inhibitor (NNRTI) resistance. The odds of NNRTI-associated TDR also increased in Latin America/Caribbean (odds ratio [OR] = 1.16; 95% CI: 1.06-1.25), North America (OR = 1.19; 95% CI: 1.12-1.26), Europe (OR = 1.07; 95% CI: 1.01-1.13), and upper-income Asian countries (OR = 1.33; 95% CI: 1.12-1.55). In SSEA, there was no significant change in the odds of TDR since national ARV scale-up (OR = 0.97; 95% CI: 0.92-1.02). An analysis limited to sequences with mixtures at less than 0.5% of their nucleotide positions—a proxy for recent infection—yielded trends comparable to those obtained using the complete dataset. Four NNRTI SDRMs—K101E, K103N, Y181C, and G190A—accounted for >80% of NNRTI-associated TDR in all regions and subtypes. Sixteen nucleoside reverse transcriptase inhibitor (NRTI) SDRMs accounted for >69% of NRTI-associated TDR in all regions and subtypes. In SSA and SSEA, 89% of NNRTI SDRMs were associated with high-level resistance to nevirapine or efavirenz, whereas only 27% of NRTI SDRMs were associated with high-level resistance to zidovudine, lamivudine, tenofovir, or abacavir. Of 763 viruses with TDR in SSA and SSEA, 725 (95%) were genetically dissimilar; 38 (5%) formed 19 sequence pairs. Inherent limitations of this study are that some cohorts may not represent the broader regional population and that studies were heterogeneous with respect to duration of infection prior to sampling.

sustiva drug 2015-03-18

Small intensive pharmacokinetic (PK) studies of medications in early-phase trials cannot identify the range of factors that influence drug exposure in heterogenous populations. We performed PK studies in large numbers of HIV-infected women on nonnucleoside reverse transcriptase inhibitors (NNRTIs) under conditions of actual use to assess patient characteristics that influence exposure and evaluated the relationship between exposure and response.