It is the body's ineffective response to a particular drug. A person develops tolerance for the drug and the drug no longer effects on his body for the treatment of disease for which it was referred.

TACHYPHYLAXIS: "The person with tachphylaxix cannot be given the same drug for which he has developed tolerance."
Cite this page: N., Pam M.S., "TACHYPHYLAXIS," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/tachyphylaxis/ (accessed September 24, 2021).