How many letters does the top answer for “resisting poison; obviating the effects of venom; alexipharmic.” have?

The most common answer is alexiteric (10 letters).

Crossword clue: resisting poison; obviating the effects of venom; alexipharmic.

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

alexiteric 10 letters web-def

A preservative against contagious and infectious diseases, and the effects of poison in general. Brande & C.

alexiterical 12 letters web-def

Resisting poison; obviating the effects of venom; alexipharmic.