Factors Affecting Drug Biotransformation: Biological

Drug metabolism varies among species due to distinct enzyme systems and metabolic pathways.

Even within the same species, diverse strains can exhibit metabolic variation due to differences in enzyme activity.

Hormonal disparities between sexes can influence drug metabolism by altering enzyme expression and activity.

Additionally, age can influence drug metabolism, with potential changes in enzyme activity over time.

Certain foods or nutrients in one's diet can interact with enzymes or impact their levels, affecting metabolism.

Physiological conditions like pregnancy can alter drug metabolism via hormonal and physiological changes.

Disease states can disrupt the body's normal physiological processes. Diseases or disorders involving the liver, such as hepatitis, may inhibit metabolism.

The circadian rhythm is a temporal factor that can impact drug metabolism, affecting drugs like melatonin.

Seasonal variations in the circannual rhythm can also impact drug metabolism, as seen in treatments for seasonal affective disorder, like light therapy.