A Study of the Longitudinal Patterns of Stimulant and Amyl Nitrite Use and Sexual Behavior Pre- and Post-HIV Seroconversion Among MSM

Patterns of Chemsex Substance Use and Its Association with HIV Transmission Risk Among Men Who Have Sex with Men in Thailand: A Latent Class Analysis

Sexualized substance use or "chemsex" may contribute to the HIV epidemic among men who have sex with men (MSM) in Thailand. Specific patterns of chemsex use may be associated with different HIV/STI transmission risks. We examined typologies and correlates of sexualized substance use among a sample of high-risk MSM (n = 532) who had attended a private sex party or circuit party in the past three years using latent class analysis. Multinomial regression was used to adjust for variables associated with the 3-class latent class model. We identified a 3-class model as the best fitting model, which included: (1) "negligible sexualized substance users" (36.7%), who had never engaged in chemsex in the past six months; (2) "sexualized substance users" (13.9%), who had a high level of sexualized alcohol use and a wide range of other substances before or during sex in the past six months; and (3) "exclusive chemsex users" (49.4%), who predominantly used crystal methamphetamine, amyl nitrite, and erectile dysfunctional drugs before or during sex in the past six months. Compared to negligible sexualized substance users, exclusive chemsex users were more likely to be HIV-positive, more likely to have six or more sexual partners in the past six months, less likely to have condom use at last anal intercourse, and more likely to have provided sex work. Relative to negligible sexualized substance users, sexualized substance users reported more frequent online sex-seeking behaviors. These subgroups of Thai MSM have unique substance use patterns and HIV-related risk profiles, underscoring the importance of targeted HIV prevention strategies.

Patterns of Polysubstance Use in Young Black and Latinx Sexual Minority Men and Transgender Women and Its Association with Sexual Partnership Factors: The PUSH Study

Background: Adult studies have demonstrated that polysubstance use increases HIV acquisition risk through increased sexual behaviors, however, few studies have examined polysubstance in young Black and Latinx sexual minority men (SMM) and transgender women (TW). Methods: We used cross-sectional data from 466 young Black and Latinx SMM and TW living in four high HIV-burden US cities enrolled in the PUSH Study, a status-neutral randomized control trial to increase HIV prevention and treatment adherence. We examined data for patterns of polysubstance use comparing age differences of use and explored associations between substance use and sexual partnership factors - inconsistent condom use, pressure to have condomless anal sex, and older partner, using bivariate and multivariate analyses. Results: Most participants described prior substance use with alcohol and cannabis being most common (76% each) and 23% described other illicit drug use, including stimulants, cocaine, hallucinogens, sedatives, opioids, and inhalants. Polysubstance use was common with nearly half (47%) of participants reporting alcohol and cannabis use, 20% reporting alcohol, cannabis, and one other illicit drug use, and 19% reporting alcohol or cannabis use plus one other illicit drug use. Polysubstance use was associated with greater adjusted odds of pressure to have condomless anal sex, older partner (>5 years older), and inconsistent condom use. Conclusions: Associations of polysubstance use with sexual practices and sexual partnerships that are known predictors of HIV acquisition or transmission among Black and Latinx SMM and TW underscore the need for combination interventions that include substance use treatment alongside antiretroviral-based and partner-based HIV prevention and treatment interventions.Trial Registration: ClinicalTrials.gov Identifier: NCT03194477.

Poppers use and HIV infection-a literature review

INTRODUCTION

During the HIV surge in the 1980s, inhaled volatile nitrites (poppers) were hypothesized as a possible cause of the AIDS. Later it was found that poppers use was not the cause but rather a marker associated with HIV acquisition and sexual behaviors without the use of prevention tools.

OBJECTIVES

This article reviews the available literature regarding the association between poppers use and newly acquired HIV, aiming to support the hypothesis that there is no causal association between nitrites use and HIV transmission and to discuss other contributing factors.

METHODS

We searched all studies published until March 2022 that discussed poppers use and HIV. We extracted relevant information, such as authors and publication year, country where the study was conducted, study design, characteristics of the population, number of participants, objectives of the study, methods, results, and limitations.

RESULTS

The search identified 1956 abstracts, and 1915 were excluded after title review. Forty-one abstracts were assessed, and 17 studies met the inclusion criteria. The majority of the studies found an association between nitrites use and HIV transmission. Four studies associated HIV transmission with sexual behavior without the use of prevention tools, and 5 articles associated nitrites use with this kind of sexual behavior.

CONCLUSIONS

Our findings show a complex association among nitrites use, sexual behaviors without the use of prevention tools, and sexually transmitted infections; furthermore, it is impossible to make causal inferences between poppers use and HIV disease. The data suggest that it is vital to consider this substance use when planning health policies for specific populations, such as men who have sex with men, focusing on harm reduction strategies, psychoeducation, and orientations on sex with the use of prevention tools.

CLINICAL TRIAL REGISTRATION

PROSPERO CRD42020181437. https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=181437.

Stimulant Use Associated With Psychosocial Factors, HIV Risk, and Concurrent Hazardous Alcohol Use Among US Adults: Exploratory Cross-Sectional Questionnaire Study

BACKGROUND

Stimulant use is a major public health problem that contributes to morbidity and mortality among men who have sex with men (MSM) in the United States. To reduce the harms associated with stimulant use, there is a need to identify the factors associated with stimulant use to inform interventions. Additionally, there is a need to use large crowdsourcing platforms like Amazon Mechanical Turk (MTurk) to engage more individuals who use substances across the United States.

OBJECTIVE

We identified the correlates of stimulant use among people who use alcohol or stimulants in the United States recruited using MTurk.

METHODS

Participants who were aged ≥18 years in the United States and reported alcohol or stimulant (ie, cocaine, crack cocaine, and methamphetamine) use were deemed eligible and recruited via the web platform MTurk. Participants completed a baseline survey, which assessed sociodemographics, psychosocial (ie, depression, affect, self-esteem, and stress) factors, substance use, and sexual behaviors. Data were collected and analyzed with STATA (version 17; StataCorp). Stratifying by MSM status, bivariate and multivariable logistic regression models were built in STATA to examine the correlates of stimulant use. Multivariable models controlled for age, race, health insurance, and relationship status.

RESULTS

Of 272 participants, 201 (73.9%) identified as male, 134 (49.2%) were MSM, 52 (19.1%) were from racial and ethnic minoritized communities, and 158 (58%) were in a relationship. The mean age was 36.10 (SD 10.3) years. A total of 40 (14.7%) participants reported stimulant use in the past 6 months. Factors significantly associated with stimulant use were being MSM (adjusted odds ratio [aOR] 4.61, 95% CI 1.97-10.81), a higher Alcohol Use Disorders Identification Test-Concise score (aOR 1.24, 95% CI 1.08-1.42), more intense cravings for alcohol in the past 24 hours (aOR 1.03, 95% CI 1.01-1.04), a higher depression score (aOR 1.06, 95% CI 1.01-1.12), a greater number of male partners in the last 6 months (aOR 1.32, 95% CI 1.08-1.61), a greater number of female partners in the last 6 months (aOR 1.42, 95% CI 1.04-1.92), and being diagnosed with a sexually transmitted infection (eg, syphilis, gonorrhea, chlamydia, herpes simplex virus, human papillomavirus, and other) in the last 6 months (aOR 14.61, 95% CI 3.45-61.87). Additionally, there was a significant additive interaction between MSM status and negative affect, such that the impact of negative affect on stimulant use was significantly greater among MSM compared with non-MSM (relative excess risk due to interaction 0.085, 95% CI 0.037-0.13).

CONCLUSIONS

Interventions that address stimulant use should use evidence-based approaches that reduce negative affect, depression, and cravings for alcohol. Additionally, interventions should be customized for MSM populations.

Self-Reported Combination HIV Prevention Strategies Enacted by a Prospective Cohort of Midlife and Older Men Who Have Sex with Men in the United States: A Latent Class Analysis

Insights into combination HIV prevention (CHP) strategies to reduce HIV incidence among midlife and older adult men who have sex with men (MSM) are limited. The current study is a secondary data analysis evaluating CHP in a sample of sexually active midlife and older adult MSM (N = 566) from the Multicenter AIDS Cohort Study Healthy Aging Substudy. Stratified by HIV serostatus, we used latent class analyses to identify CHP classes based on self-reported sociobehavioral and biobehavioral prevention strategies that participants and their male partners used in the prior 6 months. We identified three CHP classes among men living without HIV (MLWOH), including the following: high CHP overall (43.0%), high anal sex abstention (15.0%), and low prevention overall (42.0%). Among men living with HIV (MLWH), we identified four CHP classes, including the following: high CHP overall (20.9%), high CHP/low condom use (27.1%), high condom reliance (22.3%), and low prevention overall (29.7%). There were small differences by sociodemographic characteristics and sexual behavior practices between the classes; however, poppers use was often linked to being in high CHP groups. Our findings support that CHP is not one-size-fits-all for midlife and older adult MSM. There remains a need to scale up clinical providers' sexual health communication practices to assist midlife and older MSM incorporate prevention strategies, particularly biobehavioral prevention strategies that align with their patients' lived experiences.

Risk factors associated with HCV co-infection amongst MSM and transgender women living with HIV in Mexico City: A case-control study

INTRODUCTION AND OBJECTIVES

Hepatitis C virus infection (HCV) is a major cause of co-morbidity in people living with HIV (PLWHIV). The modes of HCV transmission in the local population of PLWHIV are still unclear. We conducted this study to identify risk factors for HCV transmission amongst PLWHIV in central Mexico.

MATERIAL AND METHODS

We enrolled HIV/HCV co-infected cases and HIV controls receiving care in two outpatient clinics in Mexico City. Structured questionnaires were applied, covering demographics, history of percutaneous exposures, sexual behaviors, self-reported STD and recreational drug use. The statistical analysis for between-group comparisons were multivariate logistic regression models to assess the risk factors associated with HCV co-infection. We limited the final analysis to men who have sex with men (MSM) to avoid confounders potentially related to HCV acquisition in other populations.

RESULTS

Three hundred and thirty-four MSM with HIV (175 with HCV co-infection and 159 without) were analysed. We did not identify percutaneous exposures as risk factors for HCV. Intravenous drug use (IVDU) occurred in two cases and one control case. Risk factors independently associated with acquiring HCV co-infection were: history of an ulcerative STD (aOR=2.65, 95%CI=1.44-4.88), a HCV positive partner (aOR=5.25, 95%CI=2.78-9.91), having practiced insertive fisting (aOR=2.62, 95%CI=1.01-6.90), and rectal administration of drugs during sex (aOR=2.46, 95%CI=1.25-4.84).

CONCLUSIONS

Risky sexual behaviors and chemsex seem to be the main drivers of HIV/HCV co-infection amongst PLWHIV in Central Mexico. IVDU and percutaneous exposures have a minor role in the local HCV epidemic. These findings highlight the importance of testing for HCV in sexually active MSMs.

Racial Variations in Psychosocial Vulnerabilities Linked to Differential Poppers Use and Associated HIV-Related Outcomes among Young Men Who Have Sex with Men: A Study in Two U.S. Metropolitan Areas

Background: Poppers use has become increasingly prevalent and is associated with elevated HIV risk among young men who have sex with men (YMSM) in urban settings. However, knowledge regarding racial variations of poppers use and their psychosocial determinants to inform culturally-targeted interventions remain limited. Methods: We conducted a cross-sectional study among YMSM recruited from two US metropolitan areas (Nashville, TN and Buffalo, NY) to investigate the differences of socio-environmental and mental health factors associated with poppers use and important HIV-related outcomes [e.g., HIV testing, pre-exposure prophylaxis (PrEP, substance use, and risky sexual behaviors] among White and Black YMSM (i.e., YWMSM and YBMSM). Results: Among 347 YMSM aged 18-35 years, 32.3% reported poppers use. Notably, poppers-using YWMSM were more likely (p < 0.05) to report mental health burdens (e.g., depression, anxiety, loneliness), while poppers-using YBMSM were more likely (p < 0.05) to experience adverse social-environmental events (e.g., unstable housing, food insecurity, no health insurance, perceived HIV stigma, internalized homonegativity). Poppers-using YMSM showed a higher prevalence of sexual risk behaviors (e.g., event-level alcohol/drug use, condomless insertive/receptive anal sex, group sex) compared to their non-user counterparts, with YWMSM showing the highest likelihood to engage in these risk behaviors. Compared to poppers-using YBMSM, poppers-using YWMSM were associated with a higher likelihood of ever testing for HIV, ever using PrEP and willingness to use PrEP in the next 12 months. Conclusion: Given the distinctive patterns of psychosocial determinants of poppers use between YWMSM and YBMSM, culturally-tailored poppers reduction programs should be designed to tackle the associated HIV risks among YMSM with effectivenes.

Prevalence and patterns of illicit drug use in people with human immunodeficiency virus infection in Korea

BACKGROUND

Data on illicit drug use by Korean people infected with HIV are lacking. Here, we examined the prevalence and patterns of illicit drug use among people infected with HIV in Korea.

MATERIAL AND METHODS

In this cross-sectional study, we included all patients infected with HIV who visited a tertiary care hospital in Korea from January 1990 to May 2020. Sociodemographic data of patients, including drug use, were collected at the first visit and during follow-up.

RESULTS

Among 1,267 patients, 5.13% reported the use of an illicit drug in their lifetime, and 2.61% were users of injection drugs. The most commonly used drugs were cannabis/marijuana and methamphetamine, followed by nitrite inhalants, cocaine, dextromethorphan, carisoprodol, and 3,4-methylenedioxymethamphetamine. The illicit drug users tended to be younger than non-users, homosexuals/bisexuals, and infected with hepatitis C virus (HCV); they had a higher CD4+ cell count than non-users. Among 65 users of illicit drugs, only 24.6% revealed their drug use at the first visit interview, and 24.6% reported using two or more drugs in their lifetime. Individuals who used injection drugs were more likely to be arrested for drug-related charges than the users of non-injection drugs. Moreover, they tended to be heavy users of illicit drugs, to report using two or more drugs in their lifetime, and to be HCV seropositive. In contrast, the users of non-injection drugs were more likely to be experimental users and to start using drugs overseas for the first time, but less likely to report their drug use at the first interview.

CONCLUSIONS

The prevalence of illicit drug use in people with HIV infection in Korea may have been underestimated. Further research based on more accurate measurements are warranted.

Medical, Nonmedical, and Illegal Stimulant Use by Sexual Identity and Gender

INTRODUCTION

Major knowledge gaps regarding medical and nonmedical prescription stimulant use and illegal stimulant use (i.e., cocaine/crack/methamphetamine) by sexual identity and gender have implications for individuals' health and well-being. This study improves stimulant use measurement by differentiating the type of stimulant use and focusing on lesbian, gay, and bisexual subpopulations.

METHODS

Data were pooled for adults in the 2015-2017 National Survey on Drug Use and Health (n=126,463; analyzed in 2019). Gender-stratified logistic regression models examined associations between sexual identity and past-year illegal stimulant use. Gender-stratified multinomial logistic regression models estimated odds of (1) medical use only versus no past-year prescription stimulant use, (2) any nonmedical stimulant use versus no past-year use, and (3) any nonmedical stimulant use versus medical use only.

RESULTS

Illegal stimulant use varied by sexual identity (men: gay, 9.2%; bisexual, 7.5%; heterosexual, 3.2%; women: gay/lesbian, 3.2%; bisexual, 7.8%; heterosexual, 1.5%), as did nonmedical prescription stimulant use. Relative to same-gender heterosexuals, gay (AOR=2.61, 95% CI=2.00, 3.40) and bisexual (AOR=1.70, 95% CI=1.24, 2.33) men had higher odds of past-year illegal stimulant use, as did gay/lesbian (AOR=1.63, 95% CI=1.16, 2.28) and bisexual (AOR=2.70, 95% CI=2.23, 3.26) women. Sexual minorities reported higher odds of nonmedical prescription stimulant use than heterosexuals. Any nonmedical prescription opioid use was reported by 26.4% of people who reported nonmedical stimulant use and 27.0% of people who reported illegal stimulant use.

CONCLUSIONS

Lesbian, gay, and bisexual individuals had a higher prevalence of stimulant use than their heterosexual counterparts. This has important implications for health disparities, especially given the high levels of polysubstance use. Taking a multilevel approach is crucial to reduce stimulant-related harms for lesbian, gay, and bisexual individuals.

Use of "Poppers" among Adults in the United States, 2015-2017

We sought to estimate the prevalence as well as demographic and drug use-related correlates of poppers use among adults in the United States. Data were analyzed from adult participants (ages 18-64) in the 2015-2017 National Survey on Drug Use and Health (N = 115,744), a nationally representative survey of non-institutionalized adults in the US. An estimated 3.3% of adults have ever used poppers. Over a third (35.1%) of gay men are estimated as having ever used poppers. Estimates were lower for heterosexual (3.7%) and bisexual males (11.3%), and for heterosexual (1.8%), bisexual (4.8%), and lesbian women (6.3%). In the multivariable model, compared to male heterosexuals, gay men were at increased odds for reporting lifetime popper use (aOR = 24.64, p<.001), and bisexual men (aOR = 3.55, p <.001), lesbian women (aOR = 1.86, p =.010), and bisexual women (aOR = 1.33, p =.049) were at increased odds for lifetime use. Having a college degree was associated with increased odds for use, and lifetime use of marijuana, ecstasy/MDMA/Molly, cocaine, LSD, methamphetamine, tranquilizers, and/or opioids were associated with higher odds for use. Gay men in particular are at high risk for use. Results can help inform prevention efforts, particularly in sexual minority populations.

Prevalence, frequency, and motivations for alkyl nitrite use among gay, bisexual and other men who have sex with men in Australia

BACKGROUND AND AIMS

Gay, bisexual and other men who have sex with men (GBM) use alkyl nitrites ('poppers') at higher rates than other populations to functionally enhance sexual experiences. Their use has been associated with HIV sexual risk behaviours including receptive anal sex. We investigate the prevalence, frequency, and motivations for poppers use and their relationship with HIV risk. We also discuss the implications of the recent scheduling changes to poppers by the Australian Therapeutic Goods Administration.

METHODS

Data were drawn from the Following Lives Undergoing Change (Flux) study, a prospective observational study of licit and illicit drug use among GBM. Between 2014 and 2018, 3273 GBM enrolled in the study. In 2018, 1745 GBM provided data relating to frequency of and motivations for poppers use and were included in this analysis.

RESULTS

Median age was 33 years (IQR 25-46) and 801 GBM (45.9%) had used poppers in the previous six months ('recent use'). Among these men, 195 (24.3%) had used them weekly or more frequently. Most recent users (77.4%) reported using poppers for a 'buzz' during sex or to facilitate receptive anal intercourse (60.8%). The majority (57.7%) of HIV-negative men reporting recent poppers use were concurrently taking HIV pre-exposure prophylaxis. Recent poppers use was independently associated with receptive anal intercourse with casual partners (aOR 1.71; 95%CI 1.35-2.16) and chemsex (aOR 4.32; 95%CI 3.15-5.94). Poppers use was not associated with anxiety, depression, or drug-related harms. Only 15.4% of current users indicated they would stop using poppers if they were criminalised; 65.0% said they would 'find other ways' to obtain them.

CONCLUSIONS

Poppers are commonly used by Australian GBM to functionally enhance sexual experiences, particularly to facilitate receptive anal intercourse. Few men experienced drug-related harms from poppers use. Regulatory changes must ensure potential harms from popper use are minimised without increasing barriers to access or perpetuating stigma.

Prevalence and correlates of "popper" (amyl nitrite inhalant) use among HIV-positive Latinos living in the U.S.-Mexico border region

Poppers (nitrite inhalants) are legal, commonly used by men who have sex with men, and associated with HIV acquisition, yet research is lacking on popper use and associated adverse outcomes. People living with HIV (PLWH) in the U.S.-Mexico border region lead binational lives, including accessing care and having sex and drug use partners on both sides of the border, with broad personal and public health implications. Understanding popper use provides crucial information to guide policy and develop targeted interventions for binational PLWH. We examine prevalence and correlates of popper use among HIV-positive Latinos in the border region, an underserved population at risk for poor health outcomes. This cross-sectional study recruited a convenience sample from agencies in San Diego and Tijuana to complete quantitative surveys. Participants (N = 121) were primarily male (82.6%) and gay/bisexual (62%). Lifetime substance use (excluding cannabis) was reported by 72% of participants, and 25.6% reported lifetime popper use. Individuals recruited in the U.S. were significantly more likely to report use of poppers than were participants recruited in Mexico. Our regression model found that identifying as gay/bisexual and having bought, sold, or traded sex for money, drugs, or other goods were independently associated with popper use. Findings shed light on the profile of individuals who use poppers and lay the foundation for further research to understand the context of popper use as it relates to high-risk behavior among PLWH in this region of high transborder mobility. Binational collaborative approaches are needed to improve regional HIV care outcomes and reduce transmission risk.