Hello Romy

The PKG Data Logger might be what you need:

http://www.globalkineticscorporation.com/

Colleagues and I used it recently for a Newcastle University feasibility study to track medication and gait (with another device). We have submitted that work to the ISPGR (http://www.ispgr.org/cpages/homepage) conference next year in the US. 

If you need anything else let me know.

Best wishes

Alan

HI Ma'am,

There are a number of scales to measure measure self medication devised by different researchers. However, you can use the scale used by DH James which was devised for pharmacy students. [https://www.ncbi.nlm.nih.gov/pubmed/18516701]

Regards