Since no one seems to know.
http://dictionary.re...ivity&x=12&y=131. the state or quality of being creative.
2. the ability to transcend traditional ideas, rules, patterns, relationships, or the like, and to create meaningful new ideas, forms, methods, interpretations, etc.; originality, progressiveness, or imagination: the need for creativity in modern industry; creativity in the performing arts.
3. the process by which one utilizes creative ability: Extensive reading stimulated his creativity.
Also to answer the thread's question propranolol would seem to be the best choice.
Cogn Behav Neurol. 2004 Jun;17(2):93-7.
Effect of anxiolytics on cognitive flexibility in problem solving.Silver JA, Hughes JD, Bornstein RA, Beversdorf DQ.
Ohio State University, Columbus, Ohio, USA.
OBJECTIVE: Our purpose is to examine the effect of different classes of anxiolytics on cognitive flexibility. BACKGROUND: Situational stressors and anxiety impede performance on "creativity" tests requiring cognitive flexibility. Noradrenergic agents have been shown to modulate cognitive flexibility as assessed by performance on anagrams. To determine whether these findings on noradrenergic modulation of cognitive flexibility are specific to the noradrenergic system or are a nonspecific anxiety effect, we compared the effects of propranolol, lorazepam, and placebo on the anagram task. METHODS: Subjects attended 3 test sessions. Prior to each session, subjects were given 1 of the 3 drugs. As in previous research, the natural log of the solution latency of each test item was summed for each test session and compared across drug conditions. RESULTS: For subjects able to solve the anagrams, solution times after propranolol, but not lorazepam, were significantly lower than after placebo. CONCLUSIONS: Therefore, this suggests that the phenomenon of noradrenergic modulation of cognitive flexibility does not result from a nonspecific anxiolytic effect, but rather is specific to the noradrenergic system.
Neuroreport. 1999 Sep 9;10(13):2763-7.
Noradrenergic modulation of cognitive flexibility in problem solving.
Beversdorf DQ, Hughes JD, Steinberg BA, Lewis LD, Heilman KM. Department of Neurology, Ohio State University Medical Center, Columbus 43210, USA.
Stress causes impaired performance on tests of creativity. Drugs that block beta-adrenergic receptors improve test performance in patients with test anxiety. Furthermore, catecholamine precursors (L-DOPA) reduce the flexibility of semantic networks. Our study investigated the effect of noradrenergic system modulation on cognitive flexibility in problem solving. Eighteen normal subjects undertook three problem solving tasks (number series, shape manipulation and anagrams) 45 min after propranolol, placebo and ephedrine. On the task that appeared to rely most heavily on cognitive flexibility (anagrams), subjects who were most able to solve these problems demonstrated significantly shorter solution times (logarithmic scores) after propranolol than after ephedrine. This suggested that the noradrenergic system exerts a modulatory effect on cognitive flexibility in problem solving.