Which condition is NOT commonly associated with the side effects of antineoplastic drugs?

Antineoplastic drugs, commonly used in cancer treatment, are known for their range of side effects due to their effects on rapidly dividing cells, which are not limited to cancer cells. Conditions like anemia, nausea and vomiting, and alopecia are frequently associated with these medications. Anemia occurs because these drugs can damage bone marrow, leading to reduced red blood cell production. Nausea and vomiting are common side effects due to their impact on the gastrointestinal tract and the brain's emetic center. Alopecia, or hair loss, is also prevalent as these drugs target hair follicles, which are made up of rapidly dividing cells.

In contrast, atypical blood pressure is not a well-documented side effect specifically linked to antineoplastic drugs. While some medications may cause fluctuations in blood pressure as a secondary effect, these changes are not typically highlighted as a common side effect of antineoplastic agents. Thus, this condition is less commonly associated with the side effects of these drugs, making it the correct choice in this context.