Which of the following is not a listed form of valproic acid?

• A. IV
• B. Tablet
• C. Chewable capsule
• D. Injectable solution

Answer: (D)

Valproic acid is made available in several forms to fit different routes of administration, but the injectable product used in clinics is a salt form—valproate sodium—for IV use, not the free acid itself. So an option described as an injectable solution of valproic acid isn’t a real listed form. The intravenous option would refer to the sodium valproate injectable, while tablets and chewable forms exist for oral use. The key idea is that injections use the salt form rather than the pure acid, which is why injectable solution of valproic acid isn’t a listed form.