adjective, sourer, sourest. 1. having an acid taste, resembling that of vinegar, lemon juice, etc.; tart. 2. rendered acid or affected by fermentation; fermented. 3. producing the one of the four basic taste sensations that is not bitter, salt, or sweet. 4. characteristic of something fermented: a sour smell.
General anesthetics normally are used to produce loss of consciousness before and during surgery. However, for obstetrics (labor and delivery) or certain minor procedures, an anesthetic may be given in small amounts to relieve anxiety or pain without causing unconsciousness.
Typically, a local anesthetic thatâs applied to the surgical site is used in conjunction with twilight anesthesia to ensure a pain-free experience for the patient. The drugs used in twilight anesthesia are similar to those used in general anesthesia, but the doses are lower. Specific drugs commonly used include: fentanyl, valium, ketamine, midazolam, or nitrous oxide (laughing gas). These drugs can be reversed quickly, so the patient can be woken up in a matter of minutes.