The nurse educating a client about metronidazole should state which of the following?

The statement that metronidazole is contraindicated during the first 3 months of pregnancy is supported by its safety profile. During the first trimester, when fetal organ development is occurring, the risks associated with the use of metronidazole may outweigh potential benefits. This period is critical, and while metronidazole is generally considered safe in later stages of pregnancy, healthcare providers usually exercise caution during the first trimester and advise alternatives when possible. This reflects the principle of minimizing risk to the developing fetus, emphasizing careful monitoring and evaluation of treatment options for pregnant patients.

Other options do not adequately reflect the safety precautions necessary when administering metronidazole. It's often advised to avoid alcohol due to the potential for disulfiram-like reactions, and caution is warranted in patients with blood disorders due to potential hematological side effects.