South Africa's cycling medicine men
20 August 2013 Last updated at 15:24 BST
Collecting medicine from a hospital or clinic-based dispensary in some of South Africa's townships is no mean feat.
There is the cost of transport to the facility, often hours spent queuing, the cost to have someone look after children left at home, or the loss of pay because of missing work.
But for the elderly and infirm, it can be a nightmare because they physically find it impossible to travel.
Now Sizwe Nzima, a young man from the township of Khayelitsha in Cape Town, has started a business which has seen him win a Forbes Magazine award as one of Africa's best young entrepreneurs.
For more African news from the BBC, download the Africa Today podcast.