Could be the theobromine in chocolate. https://en.wikipedia.org/wiki/Theobromine https://en.wikipedia.org/wiki/Theobromine Theobromine is useful in asthma and

Could be the theobromine in chocolate. https://en.wikipedia.org/wiki/Theobromine https://en.wikipedia.org/wiki/Theobromine Theobromine is useful in asthma and in other respiratory tract problems such as cough for which no definitive drug has been developed. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4335269/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4335269/