The present study revealed barriers and facilitators of HIV medication adherence among inmates with HIV. Result of the study indicated that substance use plays a crucial role in non-adherence to medication among the inmates with HIV. Hangover caused by delay in receiving methadone and its appropriate dose adjustment in patients undergoing MMT program prevented taking antiretroviral drugs in them. This finding was consistent with that of the other study (
27), which found that inappropriate methadone coverage is an important barrier to medication adherence. In contrast to the findings of the mentioned study, which focused mainly on increasing methadone use to improve medication adherence, the current study revealed that timely receive of methadone facilitates adherence.
The current study found that adverse side effects of antiretroviral drugs such as efavirenz and zidovudine were another barrier to treatment adherence. Such side effects were intensified if the patients did not timely use methadone or appropriate methadone dose adjustment. This finding was consistent with those of other studies on the role of side effects in non-adherence to HIV medication (
28,
29).
Cognitive impairment was considered as a significant barrier to adhere to HIV treatment in some studies (
10,
26); on the other hand, forgetfulness was the main aspect of cognitive impairment. In the current study, inmates declared that they rarely forgot taking medications, except when their daily program changed. Although forgetfulness is a barrier to take medications in patients infected with HIV, it apparently does not play a major role in this study; the reason can be attributed to low involvement of the inmates with daily living activities (
10,
26).
The study suggests that concomitant treatment with anti-TB medications might interfere with taking HIV drugs. This issue is possibly due to the tight schedule necessary to take antiretroviral and anti-TB medications concurrently, which leads to more errors in memory and timing. Another potential reason for non-adherence is the added side effect of treatment of two diseases and also increased hangovers due to interaction of rifampin with methadone.
The current study also found that stigma was a significant barrier to ART in the correctional facilities. HIV is highly stigmatized in Iran (
30) and many inmates living with HIV do not disclose their illness for the fear of rejection and discrimination. These behaviors force the infected prisoners to keep their illness confidential and take their medication secretly which, in turn, may result in missing some doses. Some of the prisoners with HIV infection may avoid taking HIV medication because they afraid the drug’s side effects reveal their illness. The current study findings are consistent with those of a prior study, which revealed that patients with HIV stigma were three times more likely to have no adherence to therapeutic regimen than those with no stigma. The studies also showed that revealing HIV status was a significant predictor for HIV adherence (
31).
Previous study revealed that nutritional support and food security have important implications for antiretroviral adherence (
32). Consistent with this research, the present study found that poor diets of HIV-positive prisoners might result in non-adherence to medication. Accessibility of complementary drugs is also required for adherence to HIV treatment regimens, and correctional officials should pay specific attention to the problem.
The results of the present study indicated that the patient-physician relationship was another factor that influences medication adherence among prisoners with HIV. It was found that patient-physician relationships can play role as the barrier or facilitator in medication adherence. Palepu et al. (
9) reported that physicians with higher HIV-related experiences more contributed to medication non-adherence in HIV-positive prisoners. The findings were consistent with those of Palepu et al. (
9), but inconsistent with those reported by Barfod et al. (
33), who showed that patient-physician relationships were often awkward and superficial, while some of the patient-physician relationships were strong and realistic and could significantly affect the medication adherence in HIV-positive prisoners.
The findings were consistent with a research reported that patients’ knowledge regarding the level of CD4 was contributed to medication adherence (
32). Patients who had lower levels of CD4 perceived a serious threat when received feedback; hence, they were more likely to show adherence.
Psychological complications such as depression have a direct impact on medication adherence; it is reported in prior studies (
19,
34-
37). Accordingly, the current study found depression as a significant barrier to adherence. Patients with depression were not hopeful about the future and treatment implications, and consequently showed no adherence to medication.
In the study by Goujard et al. (
38), the effect of patient education programs on adherence to HIV medication were evaluated. They found that education of patients in medication adherence had lasting effects. In agreement with the results of their research, the current study showed that education of patients in HIV medication adherence may facilitate adherence to HIV medication, especially when a patient educates the others.
As with qualitative studies, several limitations were observed in the current research. Although adherence is a dynamic process, the authors examined it at a static point in time. The research not included females, while barriers and facilitators of adherence may be different between males and females in the correctional facilities. For example, child-care issues maybe a crucial factor in medication adherence, which is only experienced by mothers. Nevertheless, the present research shed light on many aspects of medication adherence in the correctional facilities and revealed new barriers and facilitators of medication adherence.