Low DoseCDC recommends 7-day for pregnancy & diabetes MonistatÂ® 7 Low Dose. 7 Day Treatment Plan. The original prescription formula offers lower dosage levels and treatment over 7 days. CDC recommends only a 7-day topical treatment for pregnant women and diabetics (consult a doctor before use).
First of all, borax (sodium tetraborate decahydrate) in water produces boric acid and raises the pH. So the studies on boron toxicity that refer to boric acid are absolutely relevant for Borax as well.
(I found this on a borax toxicity site.) Boric acid and borax are commonly used in ant traps and for cockroach control. Boric acid and sodium borate (borax) is potentially toxic to people and pets. However serious poisonings in humans have been reported very rarely from a single acute ingestion.