Just catching up with Star Trek: TNG. The 1989 episode "Up the long ladder" includes a Klingon tea ceremony offered by Worf to Pulaski as a gesture of gratitude and conciliation.
Lieutenant Worf: It is a test of bravery - of one's ability to look at the face of mortality. It is also a reminder that death is an experience best shared - like the tea. Doctor Pulaski: Worf, you're a romantic! Lieutenant Worf: It is among the Klingons that love poetry achieves its fullest flower.
The infusion in question is always fatal to humans and often so to Klingons. When Worf prevents Pulaski from lifting her (very beautifully presented) cup, she steps out to inject herself with an antidote, and sips away. Everybody's happy.
-DM