Disparities in Coronavirus Disease 2019 Clinical Outcomes and Vaccination Coverage Among Migrants With Human Immunodeficiency Virus in the PISCIS Cohort: A Population-Based Propensity Score-Matched Analysis.

Background: Coronavirus disease 2019 (COVID-19) disproportionately affects migrants and ethnic minorities, including those with human immunodeficiency virus (HIV). Comprehensive studies are needed to understand the impact and risk factors. Methods: Using data from the PISCIS cohort of people with HIV (PWH) in Catalonia, Spain, we investigated COVID-19 outcomes and vaccination coverage. Among 10 640 PWH we compared migrants and non-migrants assessing rates of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) testing, diagnosis, and associated clinical outcomes through propensity score matching and multivariable Cox regression. Results: The cohort (mean age, 43 years; 83.5% male) included 57.4% (3053) Latin American migrants. Migrants with HIV (MWH) had fewer SARS-CoV-2 tests (67.8% vs 72.1%, P < .0001) but similar COVID-19 diagnoses (29.2% vs 29.4%, P = .847) compared to Spanish natives. Migrants had lower complete vaccination (78.9% vs 85.1%, P < .0001) and booster doses (63.0% vs 65.5%, P = .027). COVID-19 hospitalizations (8.1% vs 5.1%, P < .0001) and intensive care unit (ICU) admissions (2.9% vs 1.2%, P < .0001) were higher among migrants, with similar hospitalization duration (5.5 vs 4.0 days, P = .098) and mortality (3 [0.2%] vs 6 [0.4%], P = .510). Age ≥40 years, CD4 counts <200 cells/µL, ≥2 comorbidities, and incomplete/nonreception of the SARS-CoV-2 vaccine increased the risk of severe COVID-19 among migrants. Conclusions: MWH had lower rates of SARS-CoV-2 testing and vaccination coverage, although the rates of COVID-19 diagnosis were similar between migrants and non-migrants. Rates of COVID-19-associated hospitalizations and ICU admissions were higher among migrants in comparison with non-migrants, with similar hospitalization duration and mortality. These findings can inform policies to address disparities in future pandemic responses for MWH.

Impact of tenofovir on SARS-CoV-2 infection and severe outcomes among people living with HIV: a propensity score-matched study.

BACKGROUND: Reports on the impact of some antiretrovirals against SARS-CoV-2 infection and disease severity are conflicting. OBJECTIVES: We evaluated the effect of tenofovir as either tenofovir alafenamide/emtricitabine (TAF/FTC) or tenofovir disoproxil fumarate/emtricitabine (TDF/FTC) against SARS-CoV-2 infection and associated clinical outcomes among people living with HIV (PLWH). METHODS: We conducted a propensity score-matched analysis in the prospective PISCIS cohort of PLWH (n = 14 978) in Catalonia, Spain. We used adjusted Cox regression models to assess the association between tenofovir and SARS-CoV-2 outcomes. RESULTS: After propensity score-matching, SARS-CoV-2 diagnosis rates were similar in TAF/FTC versus ABC/3TC recipients (11.6% versus 12.5%, P = 0.256); lower among TDF/FTC versus ABC/3TC recipients (9.6% versus 12.8%, P = 0.021); and lower among TDF/FTC versus TAF/FTC recipients (9.6% versus 12.1%, P = 0.012). In well-adjusted logistic regression models, TAF/FTC was no longer associated with reduced SARS-CoV-2 diagnosis [adjusted odds ratio (aOR) 0.90; 95% confidence interval (CI), 0.78-1.04] or hospitalization (aOR 0.93; 95% CI, 0.60-1.43). When compared with ABC/3TC, TDF/FTC was not associated with reduced SARS-CoV-2 diagnosis (aOR 0.79; 95% CI, 0.60-1.04) or hospitalization (aOR 0.51; 95% CI, 0.15-1.70). TDF/FTC was not associated with reduced SARS-CoV-2 diagnosis (aOR 0.79; 95% CI, 0.60-1.04) or associated hospitalization (aOR 0.33; 95% CI, 0.10-1.07) compared with TAF/FTC. CONCLUSIONS: TAF/FTC or TDF/FTC were not associated with reduced SARS-CoV-2 diagnosis rates or associated hospitalizations among PLWH. TDF/FTC users had baseline characteristics intrinsically associated with more benign SARS-CoV-2 infection outcomes. Tenofovir exposure should not modify any preventive or therapeutic SARS-CoV-2 infection management.

Barreras para el inicio del tratamiento antirretroviral en pacientes con virus de la inmunodeficiencia humana e indicación de tratamiento en España. ¿Por qué no inician tratamiento quienes lo tienen indicado? Estudio Bridgap / Barriers to ART initiation in HIV infected subjects and with treatment indication in Spain. Why don’t they start their treatment? Bridgap Study

INTRODUCCIÓN: En España algunos pacientes con VIH no reciben tratamiento antirretroviral (TAR), aun teniendo indicaciones para ello. Nuestro objetivo es identificar las barreras de inicio del TAR en pacientes con indicación para recibirlo. MÉTODOS: Encuesta transversal en 19 hospitales en España en 2012, incluyendo todos los pacientes que no recibían tratamiento y tenían al menos una indicación según las recomendaciones de Gesida/2011. Las posibles barreras se agruparon así (categorías no excluyentes): a) el médico considera que la indicación no es absoluta; b) el paciente no quiere iniciarlo; c) el médico considera que debe iniciarlo pero existe alguna limitación o contraindicación; y d) el paciente tiene viremia indetectable en ausencia de tratamiento. RESULTADOS: Se incluyeron 256 pacientes de los 784 programados; 84% hombres, mediana de edad 39 años; 57% homosexuales, 24% heterosexuales, 16% UDI. Mediana de tiempo desde el diagnóstico: 3 años, CD4: 501 células/mm3, carga viral 4,4 log. Indicaciones de TAR más frecuentes: CD4 < 500 células/mm3(48%), pareja sexual no infectada (28%), coinfección con virus de la hepatitis C (23%). Las barreras para el inicio del TAR fueron dependientes del médico en el 55% de los casos, del paciente en el 28%, otras limitaciones: 23%, viremia indetectable: 6%. CONCLUSIONES: La mayoría de los pacientes con indicación de TAR lo estaban recibiendo. El motivo más frecuente en quienes no lo recibían fue que el médico pensaba que la indicación no era absoluta, y prefería esperar, lo que sugiere la necesidad de enfatizar en los beneficios de iniciar el TAR en estos casos

INTRODUCTION: In Spain, HIV treatment guidelines are well known and generally followed. However, in some patients there are no plans to initiate ART despite having treatment indications. The current barriers to ART initiation are presented. METHODS: A cross-sectional survey including every HIV infected patient in care in 19 hospitals across Spain in 2012, with ≥1 indication to start ART according to 2011 national treatment guidelines, who had not been scheduled for ART initiation. Reasons for deferring treatment were categorized as follows (non-exclusive categories): a) The physician thinks the indication is not absolute and prefers to defer it; b) The patient does not want to start it; c) The physician thinks ART must be started, but there is some limitation to starting it, and d) The patient has undetectable viral load in absence of ART. RESULTS: A total of 256 patients, out of 784 originally planned, were included. The large majority (84%) were male, median age 39 years, 57% MSM, 24% heterosexuals, and 16% IDUs. Median time since HIV diagnosis was 3 years, median CD4 count, 501 cells/mm3, median viral load 4.4 log copies/ml. Main ART indications were: CD4 count < 500 cells/mm3, 48%; having an uninfected sexual partner, 28%, and hepatitis C coinfection, 23%. Barriers due to, the physician, 55%; the patient, 28%; other limitations, 23%; and undetectable viral load, 6%. CONCLUSIONS: The majority of subjects with ART indication were on it. The most frequent barriers among those who did not receive it were physician-related, suggesting that the relevance of the conditions that indicate ART may need reinforcing

[Barriers to ART initiation in HIV infected subjects and with treatment indication in Spain. Why don't they start their treatment? Bridgap Study]. / Barreras para el inicio del tratamiento antirretroviral en pacientes con virus de la inmunodeficiencia humana e indicación de tratamiento en España. ¿Por qué no inician tratamiento quienes lo tienen indicado? Estudio Bridgap.

INTRODUCTION: In Spain, HIV treatment guidelines are well known and generally followed. However, in some patients there are no plans to initiate ART despite having treatment indications. The current barriers to ART initiation are presented. METHODS: A cross-sectional survey including every HIV infected patient in care in 19 hospitals across Spain in 2012, with ≥1 indication to start ART according to 2011 national treatment guidelines, who had not been scheduled for ART initiation. Reasons for deferring treatment were categorized as follows (non-exclusive categories): a) The physician thinks the indication is not absolute and prefers to defer it; b) The patient does not want to start it; c) The physician thinks ART must be started, but there is some limitation to starting it, and d) The patient has undetectable viral load in absence of ART. RESULTS: A total of 256 patients, out of 784 originally planned, were included. The large majority (84%) were male, median age 39 years, 57% MSM, 24% heterosexuals, and 16% IDUs. Median time since HIV diagnosis was 3 years, median CD4 count, 501 cells/mm3, median viral load 4.4 log copies/ml. Main ART indications were: CD4 count <500 cells/mm(3), 48%; having an uninfected sexual partner, 28%, and hepatitis C coinfection, 23%. Barriers due to, the physician, 55%; the patient, 28%; other limitations, 23%; and undetectable viral load, 6%. CONCLUSIONS: The majority of subjects with ART indication were on it. The most frequent barriers among those who did not receive it were physician-related, suggesting that the relevance of the conditions that indicate ART may need reinforcing.

Efficacy, safety and pharmacokinetics of 900/100 mg of darunavir/ritonavir once daily in treatment-experienced patients.

OBJECTIVES: To evaluate the virological efficacy, safety, tolerability and pharmacokinetics of a regimen containing 900/100 mg of ritonavir-boosted darunavir once daily in patients with antiretroviral experience but no darunavir resistance. PATIENTS AND METHODS: An observational, prospective, multicentre study was conducted. Patients were included if 900/100 mg of darunavir/ritonavir once daily and at least one other active drug had been started due to virological failure, simplification or toxicity. Minimum follow-up was 24 weeks, or less if there was premature discontinuation of any drug or loss to follow-up. In a subgroup of patients, a complete 24 h pharmacokinetic study was performed by HPLC. RESULTS: One hundred and three patients (47 switch strategies, 56 early salvage therapies) were included. After 6 months, 85/103 (83%; 95% CI: 74%-89%) and 85/93 (91%; 95% CI: 84%-97%) patients had <50 copies/mL HIV-RNA by intention-to-treat and on-treatment analyses, respectively. The respective values were 42/47 (89%; 95% CI: 72%-96%) and 42/43 (98%; 95% CI: 88%-100%) in switch therapy, and 43/56 (77%; 95% CI: 64%-87%) and 43/50 (86%; 95% CI: 73%-94%) in salvage therapy. There was a significant increase in CD4 cell counts [+73 cells/mm(3) (95% CI: 43%-102%), P<0.001]. There were no interruptions due to rash or liver toxicity. Significant decreases in cholesterol and triglycerides were seen in patients with abnormal lipids at baseline. Ten patients discontinued antiretrovirals (5 were lost to follow-up and 5 due to side effects). Twenty-five patients were included in the pharmacokinetic study. All patients had trough plasma concentrations >0.05 µg/mL. CONCLUSIONS: Darunavir/ritonavir at 900/100 mg once daily is highly effective, safe and well tolerated in treatment-experienced patients with no darunavir resistance, both in early salvage and switch strategies. Adequate drug plasma levels were achieved in all patients.

Infección por el virus de la inmunodeficiencia humana y geriatría, una nueva realidad / No disponible

Desde 1996, momento en que se generalizó el uso del tratamiento antirretroviral de alta eficacia, se ha producido un cambio pronóstico importante para los pacientes con infección por el virus de la inmunodeficiencia humana, cronificando la infección y presentando expectativas de vida similar, en algunos casos, a la población general no infectada. Por otro lado, los factores de riesgo para la adquisición de la infección están cambiando, siendo actualmente la vía sexual la principal vía de contagio. Los pacientes ancianos han sido considerados tradicionalmente un grupo de bajo riesgo para la infección, pero las mejoras en el tratamiento de la disfunción eréctil y una falsa sensación de seguridad que conlleva a un bajo uso de métodos anticonceptivos de barrera comportan que los pacientes ancianos presenten un riesgo no despreciable para infectarse. El personal sanitario también infraestima el riesgo en estos pacientes, llevando a retrasos diagnósticos y en el inicio del tratamiento, que empeoran el pronóstico de estos pacientes (AU)

Since 1996, with the widespread use of highly active antiretroviral treatment, a shift has important prognostic for patients infected with the human immunodeficiency virus, becoming a chronic infection and presenting life expectancy similar, in some cases, to not infected general population. Moreover, risk factors for acquisition of infection are changing, sexual intercourse is the main risk factor for HIV. Elderly patients have traditionally been considered a low risk group for infection, but improvements in the treatment of erectile dysfunction and a false sense of security that leads to a low use of barrier methods behave that elderly patients present a non-negligible risk to be infected. Health staff also under estimates the risk in these patients, leading to delays in diagnosis and initiation of treatment, which worsen the prognosis of those patients (AU)

Effect of nevirapine on the steady-state trough concentrations of atazanavir in HIV-infected patients receiving atazanavir/ritonavir.

MATERIAL AND METHODS: To evaluate the influence of nevirapine on atazanavir trough concentrations (Ctrough) in a group of HIV-infected patients, we performed an open-label pilot study enrolling patients receiving 300/100 mg atazanavir/ritonavir once daily for 2 weeks or longer. Nevirapine was added at a dose of 200 mg once daily from Days 0 to 14 and 200 mg twice daily from Days 14 to 28. Atazanavir and nevirapine plasma Ctroughs were determined at Days 0 and 28. Atazanavir Ctroughs were compared between Days 0 and 28. Atazanavir and nevirapine Ctroughs at Day 28 were compared with historical controls receiving either 400 mg atazanavir once daily or 200 mg nevirapine twice daily. RESULTS: Fourteen patients were enrolled and 11 completed the study. The geometric mean (range) atazanavir Ctrough decreased from 0.631 mg/L (range, 0.235-1.87 mg/L) at Day 0 to 0.316 mg/L (range, 0.142-1.109 mg/L) at Day 28 to give a geometric mean ratio of 0.59 (95% confidence interval, 0.38-0.80; P = 0.026); nonetheless, the atazanavir Ctrough remained higher than the minimum effective concentration in 80% of the participants and higher than the median concentration in the control subjects receiving 400 mg atazanavir once daily without ritonavir (geometric mean ratio, 3.20; 95% confidence interval, 1.65-6.22; P = 0.001). The nevirapine Ctrough at Day 28 was slightly higher than in the historical controls on 200 mg nevirapine twice daily without atazanavir (geometric mean ratio, 1.46; 95% confidence interval, 1.04-2.06; P = 0.030). CONCLUSION: We conclude that coadministration of 300/100 mg atazanavir/ritonavir once daily plus 200 mg nevirapine twice daily was safe and well tolerated but resulted in a decrease of atazanavir Ctrough by nearly half. Therefore, monitoring atazanavir Ctrough is recommended in patients treated with this drug combination, and increasing the atazanavir dose might be necessary.

Influence of HAART on the clinical course of HIV-1-infected patients with progressive multifocal leukoencephalopathy: results of an observational multicenter study.

BACKGROUND: The aim of this study was to analyze the incidence of new cases, survival of HIV-1-infected patients with progressive multifocal leukoencephalopathy (PML), and the characteristics of PML-associated immune reconstitution inflammatory syndrome (IRIS). METHODS: Multicenter observational cohort study of all HIV-1-infected patients newly diagnosed of PML in 7 hospitals in Barcelona (Spain) from 2002 to 2006. The annual incidence of PML was calculated. Survival was estimated using the Kaplan-Meier method. IRIS was defined as new onset or rapid worsening of PML shortly after initiation of highly active antiretroviral therapy together with a decline in HIV-1 viral load and rising of CD4 lymphocytes. RESULTS: Sixty-one new cases of PML were diagnosed. The mean survival time was 15 months [95% confidence interval (CI), 11 to 19]. The Kaplan-Meier estimates of the probability of survival were 47.7% (95% CI, 35 to 59) at 6 months, 38.6% (95% CI, 25 to 51) at 12 months, 35.1% (95% CI, 22 to 48) at 24 months, and 25.1% (95% CI, 10 to 40) at 36 months. IRIS was diagnosed in 14 (23%) cases. Mortality was similar in patients with and without IRIS. CONCLUSIONS: PML continues to be one of the deadliest opportunistic infections in acquired immunodeficiency syndrome patients. The development of PML-associated IRIS has no influence on prognosis.

[Efficacy and safety of a reduced-dose of stavudine in HIV-infected patients under immunological and virological stable conditions]. / Impacto de la reducción de dosis de estavudina en su perfil de eficacia/seguridad en pacientes con infección por el virus de la inmunodeficiencia humana inmunológica y virológicamente estables.

BACKGROUND AND OBJECTIVE: Stavudine (d4T) has shown a favourable short and long-term tolerability profile. Nevertheless, its usage is currently decreasing due to some safety concerns. We aimed to evaluate the efficacy and safety of d4T low-dose-based regimens. PATIENTS AND METHOD: This was a multicenter and retrospective review chart of patients receiving standard doses of d4T for > or = 6 months (weight > 60 kg: 40 mg/12 h; weight < 60 kg: 30 mg/12 h) and having undetectable viral load for at least 3 months before the d4T dose reduction (weight > 60 kg: 30 mg/12 h; weight < 60 kg: 20 mg/12 h). Immunological and viral parametres, lipid profile and side effects were determined. RESULTS: A total of 982 patients were included. The main reason for reducing the dose was prevention of toxicity (76%). After 6 months of follow-up, 97% and 84% patients had less than 400 and 50 cp/ml, respectively, and the CD4 cell count increased by 38 cel/ml. Lipids, lipodystrophy and peripheral polineuropathy improved but there was no statistical significance. CONCLUSIONS: A d4T dose reduction in an immuno-virologically stable population does not affect treatment efficacy. Longer follow-ups are required to confirm improvements in the safety profile.

HIV-1-infected long-term non-progressors have milder mitochondrial impairment and lower mitochondrially-driven apoptosis in peripheral blood mononuclear cells than typical progressors.

Mitochondrial parameters in peripheral blood mononuclear cells (PBMC) and their relationship with mitochondrially-driven PBMC apoptosis were investigated in a group of HIV-1-infected long-term nonprogressors (LTNP) and compared with untreated asymptomatic HIV-1 infected typical progressors (TP) and uninfected healthy controls (HC). Twenty-six LTNP, 27 TP and 31 HC were evaluated. Studies were performed in PBMCs. Mitochondrial DNA content (mtDNA) was assessed by quantitative real-time PCR. Activities of mitochondrial respiratory chain complexes (MRC) II, III and IV were determined by spectrophotometry. Caspase-3 activity was assessed by fluorimetry, and caspase-9 activation and Bcl-2 levels were assessed by immunoblotting. mtDNA abundance (p<0.05), MRC complex II (p<0.001), complex III (p<0.01) and complex IV (p=0.01) were lower in the TP group than in the HC group. In the LTNP group these parameters were similar to those of the HC group except for complex II, which was decreased (p<0.01). The PBMC of TP showed the highest overall apoptotic activation, since their caspase-3 activity was greater than that of HC (p<0.05) and LTNP. In the case of LTNP, however, the difference was non-significant. Caspase-9 and the caspase-9/Bcl-2 ratio were both over-expressed in TP compared to HC (p<0.01) and LTNP (p<0.05). Both of these measurements indicate that mitochondrially-driven apoptosis in TP is greater than in LTNP and HC. A relationship between mitochondrial damage and apoptotic activation was found in TP. Mitochondrial damage is associated with increased PBMC apoptosis in patients with active HIV-1 replication (TP). These abnormalities are slight or not present in LTNP.

[Effectiveness and tolerance of atorvastatin for antiretroviral therapy-secondary dyslipemia]. / Eficacia y tolerancia de la atorvastatina en el tratamiento de la dislipemia secundaria a tratamiento antirretroviral.

BACKGROUND AND OBJECTIVE: We investigated atorvastatin effectiveness and tolerance in HIV patients with hypercholesterolemia related to antiretroviral treatment. PATIENTS AND METHOD: Prospective study that included HIV+ patients under antiretroviral treatment who displayed secondary dyslipemia and medical treatment criteria (according to NCEP-III). These patients were given 10 mg/day atorvastatin and hygienic-dietetic measures. If the therapeutic objectives were not achieved, the dose of atorvastatin was increased to 20 mg/day. Patients were followed up for 6 months. RESULTS: 32 patients were included. In 5 cases it was necessary to increase the dose from 10 mg atorvastatin to 20 mg. The therapeutic objective was obtained in 62% cases, with a good clinical tolerance. Only one adverse effect was noticed, which forced the removal of the drug. CONCLUSION: In our study atorvastatin was effective for the treatment of dyslipemia in HIV patients, and it was safe and well tolerated.

Eficacia y tolerancia de la atorvastatina en el tratamiento de la dislipemia secundaria a tratamiento antirretroviral / Effectiveness and tolerance of atorvastatin for antiretroviral therapy-secondary dyslipemia

Fundamento y objetivo: Conocer la utilidad clínica del tratamiento hipolipemiante con atorvastatina en pacientes infectados por el virus de la inmunodeficiencia humana (VIH) con hipercolesterolemia asociada al tratamiento antirretroviral, así como su tolerabilidad. Pacientes y método: Estudio observacional, prospectivo y no controlado que incluye a pacientes infectados por el VIH en tratamiento antirretroviral que presentan dislipemia secundaria con criterios de tratamiento médico según el National Cholesterol Education Program Adult Treatment Panel III (NCEP-ATP III). La intervención terapéutica realizada fue atorvastatina a dosis de 10 mg/día y medidas higiénico-dietéticas. Si a los 3 meses de tratamiento no se alcanzaba los objetivos terapéuticos, se aumentaba la dosis de atorvastatina a 20 mg/día. Se realizó un seguimiento clínico y analítico durante 6 meses. Resultados: Se incluyó a 32 pacientes. En 5 casos se precisó aumentar la dosis de 10 a 20 mg de atorvastatina al día. En un 62% de los casos se consiguió el objetivo terapéutico con buena tolerancia clínica. Se observó un efecto adverso que obligó a retirar el fármaco. Conclusión: En este estudio, la atorvastatina ha resultado ser eficaz y bien tolerada para el tratamiento de la dislipemia en la población infectada por el VIH+

Background and objective: We investigated atorvastatin effectiveness and tolerance in HIV patients with hypercholesterolemia related to antiretroviral treatment. Patients and method: Prospective study that included HIV+ patients under antiretroviral treatment who displayed secondary dyslipemia and medical treatment criteria (according to NCEP-III). These patients were given 10 mg/day atorvastatin and hygienic-dietetic measures. If the therapeutic objectives were not achieved, the dose of atorvastatin was increased to 20 mg/day. Patients were followed up for 6 months. Results: 32 patients were included. In 5 cases it was necessary to increase the dose from 10 mg atorvastatin to 20 mg. The therapeutic objective was obtained in 62% cases, with a good clinical tolerance. Only one adverse effect was noticed, which forced the removal of the drug. Conclusion: In our study atorvastatin was effective for the treatment of dyslipemia in HIV patients, and it was safe and well tolerated

[Clinical and pharmacokinetic interactions between methadone and nelfinavir (Nemesia study)]. / Interacciones clínicas y farmacocinéticas entre metadona y nelfinavir (estudio Nemesia).

BACKGROUND AND OBJECTIVE: Patients on methadone maintenance therapy who are administered nelfinavir show a decrease in methadone plasma levels. However, the clinical relevance of this fact is seldom significant because it does not correlate with the appearance of opioid withdrawal symptoms (OWS). The objective of this study was to assess the clinical and pharmacokinetic interactions between methadone and nelfinavir. PATIENTS AND METHOD: A prospective multicenter study of human immunodeficiency virus (HIV) positive patients on stable methadone therapy who initiated nelfinavir was performed. To determine the presence of OWS, 2 questionnaires, objective and subjective, were administered at weeks 1, 2, 3 and 4. A pharmacokinetic study measuring the minimal plasmatic concentration of methadone was done at baseline and at week 4. RESULTS: 29 patient were included. In 7 patients who underwent pharmacokinetic studies, the minimal plasmatic concentration of methadone decreased after 4 weeks of nelfinavir treatment from 6.889 ng/ml to 4.354 ng/ml (37%; p = 0.046). However the results of the questionnaires did not show the significant OWS, which precluded an increase in the dose of methadone. CONCLUSIONS: In patients under stable methadone treatment, antiretroviral therapy including nelfinavir does not require any significant modification of methadone dose. The decrease in methadone plasmatic levels does not correlate with OWS.

Interacciones clínicas y farmacocinéticas entre metadona y nelfinavir (estudio Nemesia) / Clinical and pharmacokinetic interactions between methadone and nelfinavir (Nemesia study)

Fundamento y objetivo: En los pacientes tratados con nelfinavir y metadona disminuyen los valores plasmáticos de ésta, lo que clínicamente no suele ser importante, ya que no aparecen síntomas de abstinencia a opiáceos (SAO). Nuestro objetivo ha sido evaluar las interacciones clínicas y farmacocinéticas entre la metadona y el nelfinavir. Pacientes y método: Estudio prospectivo y multicéntrico con pacientes infectados por el virus de la inmunodeficiencia humana en tratamiento estable con metadona que iniciaban nelfinavir. La presencia de SAO se averiguó mediante sendos cuestionarios, objetivo y subjetivo, en las semanas 1, 2, 3 y 4. En un subgrupo de pacientes se midió la concentración mínima plasmática de metadona basalmente y a la cuarta semana de tratamiento. Resultados: Se incluyó a 29 pacientes y en 7 se realizó estudio farmacocinético. La concentración mínima plasmática de metadona disminuía a la cuarta semana de recibir nelfinavir desde 6,889 hasta 4,354 ng/ml (37%; p = 0,046). Los cuestionarios no detectaron SAO de forma significativa, por lo que no fue necesario cambiar significativamente las dosis de metadona. Conclusiones: La administración de nelfinavir en pacientes en tratamiento estable con metadona no precisa de modificaciones significativas de la dosis de ésta, ya que el descenso producido en sus valores plasmáticos no provoca la aparición de SAO

Background and objective: Patients on methadone maintenance therapy who are administered nelfinavir show a decrease in methadone plasma levels. However, the clinical relevance of this fact is seldom significant because it does not correlate with the appearance of opiod withdrawal symptoms (OWS). The objective of this study was to assess the clinical and pharmacokinetic interactions between methadone and nelfinavir. Patients and method: A prospective multicenter study of human immunodeficiency virus (HIV) positive patients on stable methadone therapy who initiated nelfinavir was performed. To determine the presence of OWS, 2 questionnaires, objective and subjective, were administered at weeks 1, 2, 3 and 4. A pharmacokinetic study measuring the minimal plasmatic concentration of methadone was done at baseline and at week 4. Results: 29 patient were included. In 7 patients who underwent pharmacokinetic studies, the minimal plasmatic concentration of methadone decreased after 4 weeks of nelfinavir treatment from 6.889 ng/ml to 4.354 ng/ml (37%; p = 0.046). However the results of the questionnaires did not show the significant OWS, which precluded an increase in the dose of methadone. Conclusions: In patients under stable methadone treatment, antiretroviral therapy including nelfinavir does not require any significant modification of methadone dose. The decrease in methadone plasmatic levels does not correlate with OWS

[Treatment of symptomatic hyperlactatemia and lactic acidosis in HIV+ patients under nucleoside reverse transcriptase inhibitors]. / Tratamiento de la hiperlactatemia sintomática y de la acidosis láctica en pacientes con infección por el virus de la inmunodeficiencia humana en tratamiento con inhibidores de la transcriptasa inversa análogos de los nucleósidos.

BACKGROUND AND OBJECTIVE: We intended to find out the effectiveness of lactic acidosis therapy for mitochondrial toxicity. PATIENTS AND METHOD: HIV-patients receiving nucleoside reverse transcriptase inhibitors (NRTIs), hospitalized with lactic acidosis or symptomatic hyperlactatemia. Venous hyperlactatemia was considered at > 2.2 mmol/l. Treatment consisted of a daily vitamin regime of L-carnitine, thiamine, vitamin B6, hydroxicobalamine, and vitamin C; any glucose intake was discontinued. NRTIs treatment was stopped immediately. RESULTS: Nine patients on current therapy were identified who had symptomatic hyperlactatemia (n = 4) or lactic acidosis (n = 5) from 1/2001 to 9/2002. All were patients with AIDS, receiving NRTIs with a mean duration of 5 years: ddI (n = 7), d4T (n = 5), AZT(n = 3), 3TC (n = 2), abacavir (n = 1). Most common symptoms were tachypnea, slight fever, abdominal pain, nausea, vomiting and diarrhea. All patients had a favourable prognosis after administration of L-carnitine and vitamin complexes, with discontinuation of NRTIs and glucose intake. Clinical features lasted 7 days. After 15 (5) months of follow up, none had a recurrence of the syndrome. CONCLUSION: The application of this therapy could play a role in the treatment of NRTI - related lactic acidosis.

Tratamiento de la hiperlactatemia sintomática y de la acidosis láctica en pacientes con infección por el virus de la inmunodeficiencia humana en tratamiento con inhibidores de la transcriptasa inversa análogos de los nucleósidos / Treatment of symptomatic hyperlactatemia and lactic acidosis in HIV+ patients under nucleoside reverse transcriptase inhibitors

Fundamento y objetivo: Conocer la efectividad de un tratamiento para la hiperlactatemia sintomática y la acidosis láctica secundarias al tratamiento con antirretrovirales dirigido a corregir la toxicidad mitocondrial. Pacientes y método: Se reclutó de forma consecutiva a pacientes infectados por el virus de la inmunodeficiencia humana (VIH) a los que se les diagnosticó hiperlactatemia secundaria o acidosis láctica. Se consideró hiperlactatemia con concentraciones por encima de 2,2 mmol/l. El tratamiento consistía en la administración diaria de L-carnitina, tiamina, vitamina B6, hidroxicobalamina y vitamina C, además de interrumpir la administración de glucosa intravenosa y el tratamiento antirretroviral de forma inmediata. Resultados: Se incluyó a 9 pacientes, a los que se les diagnosticó de hiperlactatemia sintomática (n = 4) o acidosis láctica (n = 5) entre enero de 2001 y septiembre de 2002. Todos eran pacientes con sida y habían recibido inhibidores de la transcriptasa inversa análogos de los nucleósidos (ITIAN) durante una media de 5 años: 7 habían recibido didanosina, 5 estavudina, 3 zidovudina, 2 lamivudina y 1 abacavir. Los síntomas que más frecuentemente se presentaron fueron taquipnea, febrícula, dolor abdominal, náuseas, vómitos y diarreas. Todos los pacientes tuvieron un buen pronóstico tras administrar L-carnitina y el complejo vitamínico descrito, así como tras la interrupción del tratamiento antirretroviral y de la perfusión de glucosa. Los síntomas desaparecieron a los 7 días. Después de una media (desviación estándar) de 15 (5) meses de seguimiento, no se ha observado recurrencia de esta complicación. Conclusión: La administración de L-carnitina, tiamina, vitamina B6, hidroxicobalamina y vitamina C junto a la suspensión del tratamiento antirretroviral podría desempeñar un papel en el tratamiento de la acidosis láctica por ITIAN en pacientes infectados por VIH

Background and objective: We intended to find out the effectiveness of lactic acidosis therapy for mitochondrial toxicity. Patients and method: HIV-patients receiving nucleoside reverse transcriptase inhibitors (NRTIs), hospitalized with lactic acidosis or symptomatic hyperlactatemia. Venous hyperlactatemia was considered at > 2.2 mmol/l. Treatment consisted of a daily vitamin regime of L-carnitine, thiamine, vitamin B6, hydroxicobalamine, and vitamin C; any glucose intake was discontinued. NRTIs treatment was stopped immediately. Results: Nine patients on current therapy were identified who had symptomatic hyperlactatemia (n = 4) or lactic acidosis (n = 5) from 1/2001 to 9/2002. All were patients with AIDS, receiving NRTIs with a mean duration of 5 years: ddI (n = 7), d4T (n = 5), AZT(n = 3), 3TC(n = 2), abacavir (n = 1). Most common symptoms were tachypnea, slight fever, abdominal pain, nausea, vomiting and diarrhea. All patients had a favourable prognosis after administration of L-carnitine and vitamin complexes, with discontinuation of NRTIs and glucose intake. Clinical features lasted 7 days. After 15 (5) months of follow up, none had a recurrence of the syndrome. Conclusion: The application of this therapy could play a role in the treatment of NRTI - related lactic acidosis