CANADA STOCKS-TSX tumbles as energy, Valeant shares weigh

Feb 28 (Reuters) - Canada's main stock index slumped on Wednesday, pulled lower by energy shares that fell alongside the

price of oil and as Valeant Pharmaceuticals tumbled

after the company gave a weaker-than-expected revenue forecast.

* The Toronto Stock Exchange's S&P/TSX composite index unofficially closed down 228.57 points, or 1.46 percent, at 15,442.58.

(Reporting by Leah Schnurr Editing by James Dalgleish)