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“The ingestion of a combination of caffeine C ) and ephedrine (E) has been reported to prolong exercise time to exhaustion during cycle ergometry at 85% VO2max.”
Aviation, space, and environmental medicine • 1999 | View Paper
“The total dose of ephedrine used to treat hypotension was significantly less in groups L and C than in group E (p < 0.001 and p < 0.001 respectively).”