CYP2D6*36x2 is assigned no function based on limited evidence in a heterozygous subject. CYP2D6*36x2 has been described in a subject with CYP2D6*21/*36x2 genotype demonstrating poor metabolism with a debrisoquine substrate (12439227). Therefore, consensus among experts was no function with an activity value of 0 based on limited evidence as it was determined the phenotypes containing a duplication of this allele would be clinically similar to phenotypes comprising the nonduplicated allele.