1. megadose - Noun
2. megadose - Verb
megadose (plural megadoses)
A dose of drug or vitamin far exceeding the normal or recommended amount, and usually given intentionally. Compare overdose.
(transitive) To dose (a patient) with a very large amount of a drug.
(transitive) To dose with a very large amount of (a drug).
Source: en.wiktionary.org