The Collaborative International Dictionary of English v.0.48:

Sudorific \Su`dor*if"ic\, a. [L. sudor sweat (akin to E. sweat)
   + facere to make.]
   Causing sweat; as, sudorific herbs. -- n. A sudorific
   medicine. Cf. Diaphoretic.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sudorific
    adj 1: inducing perspiration [syn: diaphoretic, sudorific]
    n 1: a medicine that causes or increases sweating [syn:
         sudorific, sudatory]

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "sudorific":
   ardent, baking, bathed in sweat, beaded with sweat, blistering,
   boiling, broiling, burning, burning hot, canicular, clammy,
   diaphoretic, drenched with sweat, ebullient, feverish, flushed,
   grilling, heated, hot, hot as fire, hot as hell, in a sweat,
   like a furnace, like an oven, overheated, overwarm, parching,
   perspiring, perspiry, piping hot, red-hot, roasting, scalding,
   scorching, searing, seething, simmering, sizzling hot, smoking hot,
   sticky, sudatory, sudoric, sweating, sweaty, sweltering, sweltry,
   toasting, torrid, wet with sweat, white-hot, wilted