If you currently live in the USA, you can make a donation, with all eligible tax advantages, through Friends of the Centre for Addiction and Mental Health:
Friends of the Centre for Addiction and Mental Health
1725 I Street Northwest Suite 300
Washington, DC 2000
Attn: Susan L.Q. Flaherty Esq.
For more information on giving from the USA, please contact Wade Hall, Vice President, Campaign, 416 535-8501 ext. 31239 or firstname.lastname@example.org.