The lower-income spouse should claim all medical expenses on behalf of the entire family for Canadian Income Tax. The lower your net income, the more you can claim in eligible medical expenses. But since the credit is nonrefundable the spouse who is making the claim should have sufficient income to absorb the entire credit.
"This article provides information of a general nature only. It is only current at the posting date. It is not updated and it may no longer be current. It does not provide legal advice nor can it or should it be relied upon. All tax situations are specific to their facts and will differ from the situations in the articles. If you have specific legal questions you should consult a lawyer."