This is an over the counter product - it does not require prescription.

Directions:

Odor, deeply imbedded
In carpeting, upholstery, concrete and other porous materials, use Cat-Off directly from the bottle. Pull up on the applicator cap, point the bottle at the problem area and squeeze. Thoroughly soak the area, let dry. Cat-Off must penetrate as deeply as the problem odor. If any odor remains, Cat-Off has not reached the source. Repeat treatment. This kind of problem cannot be sprayed away.

Odor, recent
Cat-Off may be used directly from the bottle as above or put into a spray bottle and sprayed on the areas affected. Very effective when applied to the surface of litter boxes or tomcat spray.

Stains
Rub area thoroughly with Cat-Off soaked sponge or cloth. Blot with clean cloth. Let dry and vacuum. Although Cat-Off is a quality stain remover, not all stains can be removed by a single agent.
Always spot test before using.