Figure 3.

Original and adapted versions of the 99DOTS envelope. The original 99DOTS envelope was two-sided (top left and right). The original envelope was adapted using human-centred design to add a decorative front cover to hide pills (and thereby reduce potential stigma; bottom left); include space for writing in the health worker’s name and phone number, simplified pictorial instructions for taking pills, and motivational imagery on the inside cover (bottom middle); and provide simplified guide to the order in which to take pills on the back cover (bottom right). In addition, the audio tone heard when patients make daily phone calls to report medication dosing was replaced with a rotating series of educational or motivational messages recorded by local health workers.