Yes, according to this page from the CRA (http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns300-350/330-331/dtlxpns-eng.ht...), diapers or disposable briefs for a person who is incontinent because of an illness, injury, or affliction can be claimed as a medical expense.