After the first week the aspirin and the veronal gave out and there was no "earthly chance" of getting more.
"Our Nervous Friends Illustrating the Mastery of Nervousness"
Robert S. Carroll
They believe it must have been an overdose of veronal.
"The Guests Of Hercules"
C. N. Williamson and A. M. Williamson
Hypnogen is apparently identical with veronal.
"Aids to Forensic Medicine and Toxicology"
W. G. Aitchison Robertson