[6] The Liberal Party formed a minority government after this election, and Caplan was appointed as Chair of the Management Board of Cabinet on June 26, 1985.
She resigned her portfolio on June 16, 1986, following accusations of a conflict of interest relating to her husband's business dealings; while protesting her innocence, she claimed she had lost the confidence of the house.
Caplan won a landslide re-election victory in the provincial election of 1987,[7] She was reappointed to Peterson's cabinet on September 29, 1987, as Minister of Health.
Caplan defeated NDP candidate Lennox Farrell by just over 2,000 votes in the 1990 campaign, and remained a prominent figure in the official opposition, serving as Deputy House Leader in 1994–95.
In late 2004, Ontario Premier Dalton McGuinty appointed Caplan to lead a provincial inquiry into the state of home-care medical services.