Pyzchiva Ustekinumab Bio-Similar
I am a UC patient, diagnosed in 2011. Treated with Stelara brand Ustekinumab for my initial loading dose in June 2025. Immediately switched to Pyzchiva brand Ustekinumab bio-similar for ongoing home injections from August 2025. After my first injection I had a nasty reaction of severe gut cramps, diarrhoea and bleeding which lasted for one week and which fell way outside of any symptoms I usually experience with my UC. Symptoms were also not caused by pathogens. Interested to know if anyone else had the same experience when switching to the same bio-similar drug.





