My cat, Archie, was diagnosed with HCM at the beginning of February after having three fainting episodes and two bouts of panting. It was really scary. He is a rescue cat about five years old and we have only had him since last July. He is really affectionate and will lie in your arms. The specialist vet put him on Sotalol, half a tablet twice a day, and Clopidogrel, one tablet once a day. Last week I took him to the vet as he had only passed small round amounts of motions for two or three days. The vet said he was constipated and gave him an enema. He passed small amounts of poo in the vet then when he came home did a bit more in the garden which looked a funny colour sort of yellowy green. I got the vet to give him his clopidogrel while he was there as he is very difficult to pill. The next day he had to go back and I again got the vet to give him his clopidogrel but the vet phoned me before he gave him anything else to say he looked jaundiced and wanted to do a blood test. The blood test showed very very high bilirubin so an appointment was arranged with the specialist for tomorrow 2 March. Archie had to go back to the vets on Friday where he had an injection of cerenia, an injection of convenia, 4 ml of lactulose and his clopidogrel tablet. He really wasn’t well on Friday night into Saturday and on Friday he had several bouts of diahorrea. I have managed to get some food into him but not cat food. He is eating very little amounts of tinned salmon, roast beef slices and roast turkey. I did an internet search of jaundice and clopidogrel and found that in humans it can cause jaundice in 1-3 percent of cases. I then found a small study where a cat had suffered liver problems after taking it. The heart specialist had never heard of problems with the drug in cats but advised me to stop administering it for now so he is just on sotalol and a half tablet of cerenia. Has anyone else had a cat who has had side effects when taking clopidogrel? Many thanks for reading.