ˌeɪtʃjˈuː kæn ɹɪzˈʌlt ɪn bˈoʊn mˈæɹoʊ səpɹˈɛʃən, ænd ðɛɹˌɑːɹ wˈɔːɹnɪŋz ðæt jˈuːzɪŋ ˌeɪtʃjˈuː wɪð dˌiːdˈiː aɪ kæn ɪŋkɹˈiːs ðə ɹˈɪsk ʌv pˌæŋkɹiːˈeɪtˈaɪɾɪs.
HU can result in bone marrow suppression, and there are warnings that using HU with ddI can increase the risk of pancreatitis.