HI there, The dosages for Pau De Arco is 3-5 drops every twelve hours and the dose for vitamin c is .25cc every twelve hours. I used this for my ferret that had lymphoma. She died from due to allergic reaction to the chemotherapy (Vincristin) but the Pau D'arco and Ester C really worked. Do not use regular vitamin c because it is to harsh on the ferrets stomach. Use Ester C or Buffered C in a liquid form instead! What I did is I mixed the Pau D'Arco and Ester C with 1cc Ferretone and 1cc water and put it in a pudding dish! This helped make the Ester C less "yucky" tasting. Sneezers would just drink it straight from the bowl!!! If you have anymore questions feel free to ask:) Samantha Rosier President Club Ferret Las Vegas [Posted in FML issue 2563]