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Table 2 Recommended preparation of 1 L CAP solutions at a range of useful (tussigenic) concentrations

From: Standardized method for solubility and storage of capsaicin-based solutions for cough induction

Desired concentration of capsaicin in solution (μM) Volume of 25 mM capsaicin stock (mL) Volume of 10% ethanol (mL)
5 0.22 999.78
10 0.44 999.56
20 0.88 999.12
40 1.76 998.24
100 4.40 995.60
150 6.60 993.40
250 11.00 989.00
375 16.50 983.50
500 22.00 978.00