Join Date: May 2008
Location: St. Albert, AB, Canada
It sounds like what happened was the sedative caused a very negative memory. Many mild sedatives used on cats don't have any affect on how the cat FEELS, only their ability to express it. So, she's scared, and doesn't feel safe (due to her lack of control of her own reactions/body movements) so now she's TERRIFIED.
The second trip was just as bad because of how awful that sedated trip was. Like if the next time you went to the dentist they gave you a sedative that left you aware, but unable to move...how would you feel about dentists after that experience?
The best way to handle this is to get her used to car trips again.
Put her in the kennel, take her out to the car. Start the car. Turn off the car, go inside and have a treat.
Put her in the kennel, take her out to the car. Start the car, back out of the driveway. Park back in the driveway, turn off the car, go in the house and have a treat.
Repeat each step a lot of times and always with yummy treats during (if she'll eat them) and after. Only move on once she's comfortable.