BUZZ-Valeant Pharmaceuticals International Inc: Set to continue gain
** Canadian drugmaker's U.S.-listed shares up 5.1 pct at $105.55 premarket
** Shares set to continue gain for second straight day
** On Monday, short-seller Citron Research said it was taking a back seat in investigating Valeant, but not backing down from earlier allegations (bit.ly/1Q1YY2b)
** Stock closed up 7 pct on Monday
** Up to Monday's close, Valeant's stock had tumbled nearly 31.5 pct since Oct. 21, when Citron said the Canadian company was using specialty pharmacies to inflate revenue
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