<s>[INST] Given an abstract text, please determine whether it contains any drug mentions. Provide a 'Yes' or 'No' answer based on the presence or absence of drugs. Abstract Text: Oral Ursodeoxycholic Acid Therapy Improves Biochemical, Endoscopic And Clinical Disease Activity In Psc-Ibd Patients: A Retrospective, Multicentre Study[/INST] Yes</s>