The Collaborative International Dictionary of English v.0.48:

Hypochondriacal \Hy`po*chon"dri*a*cal\, a.
   Same as Hypochondriac, 2. -- Hy`po*chon"dri*a*cal*ly,
   adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hypochondriacal
    adj 1: suffering from hypochondria [syn: hypochondriac,
           hypochondriacal]