Adefovirdipivoxil var mutagen i in vitro- muselymfomcelleanalysen (med eller uden stofskifteaktivering), men var ikke clastogen i in vivo- musemikronukleusanalysen.
Adefovir dipivoxil was mutagenic in the in vitro mouse lymphoma cell assay (with or without metabolic activation), but was not clastogenic in the in vivo mouse micronucleus assay.