Fig. 5.

Bitterness scores and intensity levels of the formulations in comparison with epinephrine bitartrate (EB) 9 mM as a positive control. Formulations contained EB alone or in combination with acesulfame potassium (ASK), aspartame (ASP), and/or citric acid (CA) as following: API (EB 9 mM), 1 (EB 9 mM, ASK 0.5 mM), 2 (EB 9 mM, ASP 0.5 mM), 3 (EB 9 mM, ASK 0.5 mM, ASP 0.5 mM), 4 (EB 9 mM, ASK 0.5 mM, ASP 0.5 mM, CA 0.5 mM), 5 (EB 9 mM, CA 0.5 mM)