If the maximum safe concentration for a human is 40mg/mL, what is the equivalent I have select to perform the studies on mice? In my study I have to prove that the dose given to mice is equivalent to human dose.
I think body surface area should be considered while determining the dose of any drug in humans as well as animals. You can find attached a very good article relating your question which will definitely help you in this matter.
If I understand your question you ask how to calculate the dose to administer to animals. Generally a good starting dose can be the same dose in mg/kg that you use in men. So you have to calculate the dose in mg/kg that corresponds to 40mg/ml in men and then calculate the dose to administer based on the weight of your animal. e. g. the weight of a mouse is usually about 20 g. However since the effects of a drug in different species can be very different you should try a series of dosages and modulate the dose by increasing or decreasing it on the basis of the effect obtained with the first one