Anaesthesia and analgesia

Most TA referred herein (e.g. hyoscyamine, scopolamine, N-buty 1-scopolamine, Fig. 1) primarily act as competitive antagonists of acetylcholine (anticholinergics) in the synaptic cleft (parasympatholytic) [29, 35], Thus therapeutic effects may include mydriasis, spasmolysis of the respiratory system, GIT and overactive bladder, anaesthesia and analgesia [33],... 

Hall, L. (1971). Wrighfs veterinary anaesthesia and analgesia (7th ed.). London Tindall. 

Hewer CL. In Recent Advances in Anaesthesia and Analgesia. Chmchill London, 1948 35. 

Anaesthesia and analgesia are closely related both terms can mean loss of sensation. 

Anaesthesia and analgesia both mean loss of sensation general anaesthesia leads to loss of consciousness as well, local anaesthesia means loss of sensation in part of the body and analgesia means absence of pain specifically. 

McLeod GA, Gumming C. Thoracic epidural anaesthesia and analgesia 2004. 

---