Liz Buchanan BVSc MRCVS
Hello - it sounds as if you suspect an adverse reaction to the administration of a drug. I haven't had this one happen that I can remember, but if your vet agrees that the drug is likely to have been the cause, then usually a good move would be to report this to the drugs manufacturers. Manufacturers record problems that are reported to them, as there may be things to learn - and, particularly if this is recurring, so that they can be sure to declare potential side effects properly on their data sheet. I suspect that every case is different, but if the drug company follow up on suspected adverse effects that are reported to them, they may be able to give you better information than I can regarding what is likely to happen next. I hope that something there is useful.