article · Cureus
Private medicine outlets, such as pharmacies and Accredited Drug Dispensing Outlets, are critical for delivering essential medicines in low- and middle-income nations. In Tanzania, statutory rules mandate minimum separation distances between outlets to curb excessive clustering and secure equitable access. An evaluation of 377 outlets across 18 urban centres in the Kinondoni and Ubungo districts of Dar es Salaam revealed an uneven spatial distribution. While the median nearest-neighbour distance stood at 753 metres, distances varied from under one metre to over six kilometres. Overall, 29.2 percent of mapped outlets breached national distance requirements, with similar non-compliance rates across both facility types. Heavy clustering in select wards contrasts with sparse access in others, demonstrating an enforcement gap that leads to local market saturation and geographical disparities in medicine availability.
When drug shops cluster too closely, it causes commercial saturation in some areas while leaving other communities without nearby access to essential treatments. Identifying these distance violations helps health authorities address spatial inequalities and improve regulatory enforcement, ensuring that communities across rapidly expanding urban areas have reliable and balanced access to essential medicines.
This applied research demonstrates a field-tested geospatial mapping approach that could inform digital zoning, planning, and inspection tools for regulatory authorities and health-sector planners. While the methodology is established and applied, the abstract does not describe a commercial product or enterprise pathway, indicating that translation into automated regulatory software or enterprise systems remains at an early concept stage.
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Background and objective Pharmacies and Accredited Drug Dispensing Outlets (ADDOs) play a central role in expanding access to essential medicines in low- and middle-income countries. In Tanzania, national regulations mandate minimum separation distances to prevent excessive clustering and help ensure that all communities have reasonable access to essential medicines. However, the extent of compliance in rapidly urbanizing districts remains unclear. This study aimed to examine the spatial distribution of private medicine outlets (PMOs) in the Kinondoni and Ubungo districts of Dar es Salaam and assess adherence to regulatory distance requirements. Methods A cross-sectional geospatial survey was conducted across 18 urban centers. Outlet coordinates were collected through field enumeration using REDCap (Research Electronic Data Capture) mobile tools between July 14, 2019, and September 6, 2019. Official ward boundary shapefiles were obtained from the National Bureau of Statistics. Spatial patterns were analyzed by mapping PMO locations, estimating ward-level densities, calculating nearest-neighbor distances, and evaluating compliance with Tanzania's minimum-distance regulations of 150 m for same-type outlets and 500 m for ADDO-pharmacy pairs. Results A total of 377 PMOs were mapped, comprising 232 (61.5%) ADDOs and 145 (38.5%) pharmacies. The outlet distribution was highly uneven: some wards demonstrated dense clustering, while others showed sparse coverage. The median nearest-neighbor distance was 753 m, although distances ranged from <1.0 m to over 6.0 km. Overall, 110 (29.2%) of the outlets fell below the regulatory spacing thresholds. Compliance levels were similar across outlet types. Conclusions Marked clustering and substantial non-compliance with minimum distance regulations were observed in Kinondoni and Ubungo. While dense clustering may improve convenience in some neighborhoods, persistent gaps in other areas suggest emerging spatial inequities. Geospatially informed regulatory planning is required to enhance equitable access to essential medicines. The observed 29.2% non-compliance rate highlights a meaningful regulatory gap, indicating that existing minimum-distance rules are not consistently implemented. This has practical implications for market saturation, potential unfair competition, and uneven access across neighborhoods, reinforcing the need for targeted inspections and more proactive spatial oversight.
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DOI: 10.7759/cureus.100044
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