Abstract
Summary
Injection of theophylline and of aminophylline caused no elevation of plasma FFA, but produced significant elevation of blood sugar concentration in geese, ducks, and owls.
Injection of theophylline caused elevations of both plasma FFA and blood sugar in rabbits.
The hyperglycemic and adipokinetic effects of glucagon in birds were not potentiated by the administration of theophylline.
The adipokinetic and hyperglycemic effects of glucagon in rabbits were greater when the hormone was injected after an injection of theophylline, than when it was injected during an infusion of glucagon producing levels of plasma FFA and blood sugar similar to those produced by the administration of theophylline.
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