My Persian female has Sistides(can't pea) she was getting better,now again she is sitting in the box.All medicine is gone.Have some Medicine that makes her throw up. Can't keep running to the vet?What should I do? Change food?
Ruth
Malachi 3:10
My Persian female has Sistides(can't pea)

Cystitis
she was getting better,now again she is sitting in the box.All medicine is gone.Have some Medicine that makes her throw up. Can't keep running to the vet?What should I do? Change food?

Why can't you go back to the vet? Your cat is sick.

Priscilla
Dr.,
Encourage the cat to drink more. This is not as difficult as it sounds. Simply feeding canned food will increase the amount of water that a cat consumes, even though it will physically drink more while taking dry food. You can even try mixing small amounts of water through the food.
Restrict meal times. Cats that are fed very frequently are more likely to develop FLUTD than cats with restricted meal times, no matter what type of diet is being fed. Although many cats like to eat very small amounts through the day (and night), it is possible to train your cat to eat at specific mealtimes. Put the food down in the morning, and take it way 30 minutes later. Do the same thing in the evening. At first, your cat may be upset at this, but as time goes on, she should become used to the routine.
Encourage the cat to empty its bladder more frequently. Some cats are very fussy about where and under what circumstances they will empty their bladder. For instance, many will simply not use a litter tray that has already been used. So, it is important to clean litter trays that have been used immediately. It is also a good idea to put out several litter trays around the house. In these conditions, even if the cat is left alone most of the day, there will always be a clean litter tray available.
A few of the diets that do contain the acidifiers they are: Science Diet's CD, Purina CNM, and Wysong's Uretic Diet. Getting your cat to drink more water is essential in FUS recovery. You will need to monitor your cat's intake of food and water, and output of urine very carefully, so be sure to only use a small amount of litter. You'll also want to check the color and consistency of the urine. You should isolate your FUS kitty from any other cats in the household to ensure you can monitor, inspect, and encourage him/her during the recovery time.
I would go back AND change food.
Karen
Been back twice,anything I can do?
Ruth
Malachi 3:10
Been back twice,anything I can do? Ruth Malachi 3:10

Read Iso's post.
Karen
I'm not a vet and so am very leery of giving medical advice. I will tell you what I did with one of my cats who cannot tolerate the meds for cystitis.
She totally stops eating when on the medication for a couple days. I started giving her water every morning laced with a little milk. She likes that and it gets extra fluid in her. I also started giving her more canned food instead of all Science Diet prescription. She has been fine now, knock on wood, and after a while tired of the milk in water. She also happens to be on thyroid meds which she does well with.

Barb
I can only please one person a day.
Today is not your day.
Tomorrow doesn't look good either.
My Persian female has Sistides(can't pea) she was getting better,now again she is sitting in the box.All medicine is gone.Have some Medicine that makes her throw up. Can't keep running to the vet?What should I do? Change food? Ruth Malachi 3:10

In addition to Iso's good post, I would recommend asking your vet about possibly turning the medicine into a gel that can be rubbed on your cat's ear. It may be it's just hard on her stomach. This could be an option for you. I would really recommend at least calling your vet to discuss your cat's condition, but a visit would be best. If your cat is not urinating, she could get a lot worse, fast! Good luck.

Karen