Mental Health Act: Consent to Medical Treatment (14:VI)

This information applies to British Columbia, Canada. Last reviewed for legal accuracy by the Law Students' Legal Advice Program on August 20, 2025.

The following subsections only apply to patients voluntarily admitted to a mental health facility or voluntarily receiving treatment from a health care or psychiatric service provider. Patients admitted involuntarily lose certain rights (see Section VII).

A. Adult’s Right to Consent

Every adult is presumed to be capable of giving, refusing, or revoking consent to health care and to their presence at a care facility (HCCFA, s 3).

Every adult who is capable has the right to give, refuse, and revoke consent on any grounds (including moral and religious), even if refusal will result in death (HCCFA, s 4(a)).

Every adult who is capable has the right to be involved to the greatest degree possible in all case planning and decision making (HCCFA, s 4(e)).

B. Care Provider’s Duty to Obtain Consent

A health care provider must not provide health care to an adult without consent, except in an emergency situation or when substitute consent has been given and the care provider has made every reasonable effort to obtain a decision from the adult (HCCFA, ss 5, 12).

For consent to be valid, it must be related to the proposed health care, voluntary, not obtained by fraud or misrepresentation, informed (see HCCFA, s 6(e)), and consent must be given after an opportunity to make inquiries about the procedure (HCCFA, s 6). Informed consent, according to Reibl v Hughes, [1980] 2 SCR 880 (SCC), requires a medical practitioner to advise the patient of

1. The nature of the procedure;
2. The benefits and risks of the procedure;
3. Any alternatives to the procedure; and
4. The likely prognosis of not having the procedure.

C. Emergency Situations

A care provider may provide care to an adult without the adult’s consent in an emergency situation where the adult cannot give or refuse consent, and where no personal guardian or representative is present (HCCFA, s 12). If a personal guardian or representative later becomes available and refuses consent, the care must stop (HCCFA, s 12(3)).

Furthermore, if the care provider has reasonable grounds to believe that the adult, while capable and after attaining 19 years of age, has expressed an instruction or wish applicable to the circumstances to refuse consent to the health care, then the health care must not be provided (HCCFA, s 12.1).

D. Personal Guardians and Temporary Substitute Decision Makers

A care provider may provide care to an adult without the adult’s consent if the adult is incapable of giving or refusing consent and if a personal guardian or representative gives consent (HCCFA, s 11).

If a personal guardian or representative refuses to consent, the health care may be provided despite the refusal in an emergency if the person refusing consent did not comply with their duties under the ‘‘HCCFA’’ or any other act (HCCFA, s 12.2).

A temporary substitute decision maker (TSDM) can be chosen by the care provider in accordance with section 16 of the HCCFA. See sections 16-19 of the HCCFA for the authority and duties of a TSDM. There is a statutory list of those assigned to be a TSDM, beginning with a spouse and moving down. More details can be found in Chapter 15: Adult Guardianship.

In circumstances where a person with a mental health disorder is incapable of making a health care decision, the provisions for a substitute decision maker under the HCCFA continue to apply. However, if the person is declared an involuntary patient under section 22 of the MHA, then psychiatric treatment can be provided under the deemed consent provisions of section 32 of the MHA.

E. Consent to Treatment Forms

When admitted to a mental health facility, voluntary patients (or their committees, parents, guardians, or representatives) may be asked to sign a “consent to treatment” form, which purports to authorize a given set of treatments. The law does not require such a form to be signed as a prerequisite for voluntary admission, but it does not prohibit such a requirement.

Under the HCCFA, “An adult consents to health care if

(a) the consent relates to the proposed health care,

(b) the consent is given voluntarily,

(d) the consent is not obtained by fraud or misrepresentation,

(d) the adult is capable of making a decision about whether to give or refuse consent to the proposed health care,

(e) the health care provider gives the adult the information a reasonable person would require to understand the proposed health care and to make a decision, including information about

(i) the condition for which the health care is proposed,

(ii) the nature of the proposed health care,

(iii) the risks and benefits of the proposed health care that a reasonable person would expect to be told about, and

(iv) alternative courses of health care, and

(f) the adult has an opportunity to ask questions and receive answers about the proposed health care.” (s 6).

Consent can be given in writing, orally, or inferred from conduct.

1. Refusal to Sign Consent Treatment Form: Possible Consequences

Under section 18(b) of the MHA, persons who refuse to sign the consent form may be deemed a patient who could not be cared for or treated appropriately in the facility. Such persons run the risk of being refused admission to the facility or being discharged if already admitted.

Under the Patients Property Act (PPA), hospitals may circumvent the issue of consent by seeking a court order to have the patient declared incapable of managing their personal affairs. Such an order must be supported by two medical opinions.

Under the PPA, a legal guardian or public trustee may be appointed as a committee to give consent on behalf of a patient. It is not sufficient for a family member to give consent for a voluntary informal patient without first obtaining legal guardianship or committeeship, becoming a Representative under the Representative Agreement Act, or becoming a substitute decision maker under the HCCFA.

A decision from Nova Scotia regarding guardianship found that some of the central provisions of the Incompetent Persons Act, RSNS, 1989, c 218 are unconstitutional (Webb v Webb, 2016 NSSC 180 at paras 19–¬22). This legislation allows for the appointment of a guardian where a person is found incompetent (similarly to the PPA) The court found the Act to be overbroad, as it did not allow a guardianship order to be tailored so that a person subject to that order could retain the ability to make decisions in respect of those areas in which they are capable. This case may be persuasive on the application of BC’s PPA in the future.

Sections 50 to 59 of the Adult Guardianship Act, RSBC 1996, c 6 [AGA] allow for a person from a designated agency to make unilateral decisions which affect an adult’s support and assistance without their consent, including treatment and removal from a residence. For instance, section 56 allows a person from a designated agency to apply for a court order which can determine an adult’s mode of treatment. Furthermore, section 59 gives broad powers to a person from a designated agency, such as the power to enter an adult’s premises without a warrant, to remove them from their premises and convey them to “a safe place”, and to provide emergency medical care. This is permitted so long as these powers are exercised within the context of an emergency situation or a context where the adult is incapable of providing consent. See Chapter 15: Adult Guardianship for more information.

The facility could also proceed under the HCCFA by declaring the patient incapable of consenting, by using a TSDM, or by claiming that a state of emergency exists, such that the patient must be treated without their consent.

© Copyright 2025, The Greater Vancouver Law Students' Legal Advice Society.