quacksalver

A quack or charlatan.

One who boasts of his skill in medicines and salves, or of the efficacy of his nostrums; a charlatan; a quack.

One who boasts of his skill in medicines and salves, or of the efficacy of his prescriptions; a charlatan; a quack; a mountebank.

One falsely claiming to possess medical or other skills, especially one who dispenses potions, ointments, etc. supposedly having curative powers.