theriaca
noun
the·ri·a·ca thi-ˈrī-ə-kə 
: a mixture of many drugs and honey formerly held to be an antidote to poison
theriacal
thi-ˈrī-ə-kəl
adjective 
Word History
Etymology
New Latin, from Latin, antidote against poison — more at treacle
First Known Use
1562, in the meaning defined above
Medical Definition
theriaca
noun
the·ri·a·ca thi-ˈrī-ə-kə
: an antidote to poison consisting typically of about 70 drugs pulverized and reduced with honey to an electuary
called also Venice treacle