How many letters does the top answer for “someone trained in the science of drugs (their composition and uses and effects)” have?

The most common answer is pharmacologist (14 letters).

Crossword clue: someone trained in the science of drugs (their composition and uses and effects)

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

pharmacologist 14 letters wn-def

someone trained in the science of drugs (their composition and uses and effects)