Have Cat Questions? Ask a Cat Vet Online.
Is Patsy a boy or girl? You reference both a boy and a girl in the question and it wasn't clear.
However, it sounds like your car is experiencing anxiety as this is a common cause of inappropriate urination in an otherwise healthy cat.
Aside from anti-anxiety medication such as fluoxetine, buspirone or amitriptylline, the non-prescription product I recommend most for general anxiety is called Feliway which is a pheromone produced by mother cats to make her kittens feel at ease http://www.feliway.com/us/#redirected. This is a product that can be used during times of stress or anxiety to help calm a cat and make her feel more secure in her surroundings. Another one I like for short term issues is called Rescue Remedy and information can be found here http://www.bachflower.com/rescue-remedy-information/
If you are looking for an anti-anxiety drug, talk to your veterinarian about the options out there but fluoxetine is one of the most common. Any anti-anxiety drug you give will take 6-8 weeks to have an effect so patience is key. You can use an anti-anxiety drug in combination with the above methods as well and you may find that multi-modal treatment is best for your cat. The key to her well being may be a combination of things.
Was I able to answer your questions today?