Η λέξη προέρχεται από CAPsule + tapLET, και είναι κάτι το ενδιάμεσο. Θα πρότεινα το γενικότερο "δισκία" εκτός αν σε παίρνει να επεκταθείς λίγο.

http://www.answers.com/topic/tablet
When Tylenol (paracetamol/acetaminophen) capsules were laced with cyanide (an incident referred to as the Tylenol scare), many people stopped buying capsules because they are easy to contaminate, in favor of tablets, which are not. Some makers of OTC (over-the-counter) drugs responded by starting to make what they termed "caplets", which were actually just tablets made in the shape of a capsule.