\( \text{Benadryl dosage in mg} = \text{cat's weight in lb} \times 1 \text{mg} \)
\( \text{Dosage in ml} = \frac{\text{Dosage in mg}}{\text{Concentration in mg/ml}} \)
Where Concentration is given as \( \frac{12.5 \text{ mg}}{5 \text{ ml}} = 2.5 \text{ mg/ml} \)
