As you do your research, better write any questions or worries you may have and discuss them with the vet later on.

Even when certain drugs with calming or sedative effect could easily be purchased over-the-counter, you need to have your cat checked first and see if she is healthy enough to take those drugs and be sedated.

Also remind your vet of the possible illnesses your cat may have – from diabetes, kidney problems to liver issues.

You may be wondering why you should do this prior to the veterinarian's visit.

The reason is that by the time you go to the veterinarian’s office, you can ask questions about other possible options.

In this case, you should only follow the veterinarian’s advice.

Furthermore, your veterinarian can inform you of what reactions to watch out for after the sedative has been given.

For starter, you ask about Benzodiazepines which is a popular sedative that is known to reduce anxiety if quickly.

The side effects include a boost in appetite and disorientation.

Oral trazodone is also proven safe for this purpose.

For a non-medical purpose, one common medicine given to cats that have a sedative effect is Benadryl.

Note that there are sedatives and tranquilizers that have been developed to safely calm an animal when a particular procedure has to be performed.