Stress weeing - medication?

[topdot]

I've posted about this before under a different name.
DCat is going through another bout of stress weeing. We've been here before and I'm 99% certain its not an infection. She's been spooked by something outside, probably a big tom cat we get around the garden from time to time.
She's on high alert staring out of the cat flap, in and out of the litter tray, she's starting to try and wee on the lounge carpet. In fact she probably is as I'm in bed now.
We've done all the changes to her environment and it's not helping so I'm wondering about medication now as its horrid seeing her so stressed and I really don't want her to get in the habit of weeing on the carpet. I know it's so hard to stop once they start.
Any advice, anyone resorted to medication, has it helped? The feliway thing made her worse if anything, not sure what else to do.

Cytease tablets plus D-Mannose tablets - you can get them both on eBay.

My cat has crystals and gets stressed if he's accidentally shut in anywhere. He takes four tablets daily and has been absolutely fine ever since

DCat has stress cystitis. To the extent that last time DH went away with DD and I was at home, she still had a flare up, including weeing in DD's Lego.
The vet has given us a de-stressing powder to put in her food and it does seem to do the trick - solved in a day or so. The test will be when she goes to DPILs in the summer as an alternative cattery - I'm very nervous that she'll hate it (despite being essentially adopted and given full run of the (massive) house) and then we'll have a huge dilemma over future holidays.

Thanks for the replies. I'm going to ring the vets later. Pleased to hear it resolved with medication for you, fingers crossed.

@BookShark have you thought about paying a pet sitter to come to the house to feed her, less stressful than a cattery and she gets to stay in her own environment? Just a thought. Good luck!