The average cost of Donepezil per prescription in South Africa (2009) was R634.76, and R551.35 for memantine (Truter, 2019). Today the following costs are expected per pill (see https://www.pharmaris.net/order-exelon-online-en.html?key=exelon for online purchase prices):

1. Donepezil: R18.08 per pill (generic)
2. Galantamine: R40.55 per pill (generic)
3. Rivastigmine: R15.40 per pill (generic)
4. Memantine (Ebixa): Not found.

References:

Truter, I. (2019). Prescribing of drugs for Alzheimer’s disease: a South African database analysis. International Psychogeriatrics, 22(2), 264–269. https://doi.org/10.1017/S1041610209991530