Antivenin

3 clues
Snakebite medicine
Urgent need after a bite, at times
Essential supply for an ophiologist
Similar answers:
Aanti
Adamantine
Adamantium
Ancientevenings
Andantino
Antarcticalaskantigua
Anti
Antiabortion
Antiacid
Antiacids
Antiaging
Antiam
Antiamerican
Antianti
Antiar
Antiarab
Antiart
Antibes
Antibesauntie
Antibias