Pill stuck in cat's mouth.

Hi Dr. Marie. I took my cat to the Vet on Thursday for 6 month blood work. She is on methimazole for thyroid. All returned normal except thryoid level slightly elevated. She seemed fine when she returned home except she was now limping on leg where blood was drawn. Friday night she went into hiding in the cellar for an unknown reason and refused to come back up and refused to eat. I took her to the Vet late last night. They did find her leg was bruised where the blood was drawn and gave her a shot of buprenex. I felt they did a thorough exam last night and checked her back, limbs, walking, eyes, blood pressure, temperature. They do not know what is wrong. Unexplained anorexia. They thought possibly traumatized from previous visit. They told me to give her 1/4 tab mirtazapine which I did this morning. She is semi-feral so that did not go well and it got lodged in her mouth. Foaming, drooling, etc. Few hours later I could tell it was still there in her mouth. She kept trying to spit it out even a few hours later and is whinning and whimpering. I wrapped her in towel and managed to get .4ml of water in her with syringe. That initiated the drooling and foaming all over again. She refuses to come out of hiding or eat still. She only weighs 5.5 lbs but she is an extremely petite cat but the Vet does not want her to lose weight. Question: how long will it take for this horrible mirtazapine to finally dissolve for her? Should I try another dose of water? She has not had any food since Friday, should I initiate force feeding with syringe or should I just wait and let her try on her own and finally should I take her back to the Vet if she does not start eating by tomorrow or should I wait until Tuesday? Thanks so much and look forward to hearing back from you.
Regards,
Shelley Rosa

Thank you for your reply. Things have not improved. I have tried every type of cat food, tuna, baby food, chicken stock, no luck. She is going back to the Vet in an hour and a half and more than likely they will hospitalize her.

Regards,
Shelley Rosa