Unless good reasons are given to the contrary, any quantitative modification of responses resulting from repeated administration of the substance shall also be investigated.
Mura dtugtar cúiseanna maithe lena mhalairt, déanfar imscrúdú freisin ar aon athrú cainníochtúil ar na freagraí ag eascairt ó ildáileoga a thabhairt den tsubstaint.