Could I claim all contributions and additonal medical costs for a dependant parent of 73?

This question is about medical tax credits. I am a 73 year old pensioner. I thought that if I was a dependant on my son's Discovery medical aid, then he could claim form his tax the full contribution for me (being over 65) and also any additional medical costs I incur which are not covered by the medical aid (the full amount). Am I correct?
And I will tell my sons about this terrific service. Thanks

He would only be able to claim the contributions for you and the medical expenses that he paid, but not what you personally paid yourself unfortunately.