What is the maximum intramuscular injection volume in one site for a cat?

• A. 5 mL
• B. 2 mL
• C. 1 mL
• D. 0.5 mL

Answer: (B)

The amount you inject into a single muscle site must fit the muscle’s capacity and minimize tissue trauma. For cats, a practical upper limit per intramuscular site is about 2 mL. This volume is large enough to deliver many vaccines or medications in one shot, but small enough to avoid excessive distension of the muscle, reduce pain, and lower the risk of injecting into subcutaneous tissue or causing local tissue damage.

If a dose requires more than that, split it into multiple injection sites or consider a different route if appropriate. While smaller volumes (like 1 mL or 0.5 mL) are safe and commonly used, they are not the maximum per site; the question focuses on the largest safe single-site volume, which is 2 mL.