The Collaborative International Dictionary of English v.0.48:

antasthmatic \ant`asth*mat"ic\ ([a^]nt`[a^]z*m[a^]t"[i^]k; see
   Asthma; 277), a. [Pref. anti- + asthmatic.] (Med.)
   Opposing, or fitted to relieve, asthma. -- n. A remedy for
   asthma. AS
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Antasthmatic \Ant`asth*mat"ic\ (? or ?; see Asthma; 277), a.
   [Pref. anti- + asthmatic.] (Med.)
   Opposing, or fitted to relieve, asthma. -- n. A remedy for
   asthma.
   [1913 Webster]