How can pregnancy affect a woman's mental health medication?

During pregnancy, a woman's body undergoes significant physiological changes that can influence the pharmacokinetics and pharmacodynamics of medications, including those used for mental health. This means that certain medications may pose risks that were not present before pregnancy or may be intensified during this period.

Option B is correct because it reflects the reality that while some medications may still be appropriate, their risk profile can change due to factors such as the developing fetus, changes in blood volume, metabolism, and hormonal fluctuations. For instance, certain antidepressants or mood stabilizers might have been effective and safe in the pre-pregnancy period but can carry risks, such as potential teratogenic effects or withdrawal symptoms in the newborn, when taken during pregnancy.

This underscores the importance of careful medication management during pregnancy, which may necessitate adjustments to treatment plans to ensure both maternal mental health and fetal safety. Thus, the focus is on assessing the risks and making informed decisions about the continuation or modification of medications in collaboration with health care providers.