Toxicological trivia from April 15, 2010:An Asian elephant that became addicted to heroin after being fed bananas spiked with the drug was to return home in September 2008, after undergoing a detox programme. The four-year-old animal, called Xiguang, received methadone injections at five times the human dosage, state media said, during:
a) A month;
b) Six months;
C) A year.

Correct answer c. Read more in Spanish article: With doses of methadone for elephants. Also in BBCnews: Elephant cured of drug addiction