Here are some little bits of info which may be useful.
 
If a pill has a dividing line stamped into it then the medication is
evenly distributed.  If there is no dividing line it is safer to use the
entire pill when you dissolve, grind, or break it up and then measure out
doses.
 
There is a list of compounding pharmacists who helps ferrets in
http://www.smartgroups.com/vault/ferrethealth/ReferenceShelf/comp_pharm.html
 
Some meds need to be protected from water or from saliva.  These more
often are coated or in capsules, but when in doubt, check!  Some meds
should not be given in water, some should not be given in fats.
 
Some need to have dietary changes imposed.  For example in a recent study
of Cipro at Columbia's Med school teaching hospital it was found that
having dietary calcium present decreased the med in the body by over 40
percent.  That entire class of meds (fluoroquinolones) binds with a range
of minerals (calcium, iron, magnesium, aluminum, zinc).  The calcium and
Cipro aspect was the worst found.
 
When an animal is under treatment vets need to know what is given in
terms of supplements just as they need to know what meds (of ANY type)
are given and ALL of these things should be cleared with them BEFOREHAND.
For example, there are some breast tumors in humans which can incorporate
Vitamin C into themselves to reduce the effectiveness of radiation
therapy, and for all I know at this time there may be some other ones or
ones in other species which also do so.
 
There ARE OTC (over the counter) meds that are safe for humans but will
kill ferrets.
[Posted in FML issue 3979]