Arndt–Schulz rule

Arndt–Schulz rule or Schulz' law is a claimed law concerning the effects of pharmaca or poisons in various concentrations. It states that: For every substance, small doses stimulate, moderate doses inhibit, large doses kill. That is to say, highly diluted pharmaca or poisons enhance life processes, while strong concentrations may inhibit these processes and even terminate them. The rule is no longer cited in modern pharmacology texts, having been supplanted by the theory of hormesis.

Arndt–Schulz rule

Arndt–Schulz rule or Schulz' law is a claimed law concerning the effects of pharmaca or poisons in various concentrations. It states that: For every substance, small doses stimulate, moderate doses inhibit, large doses kill. That is to say, highly diluted pharmaca or poisons enhance life processes, while strong concentrations may inhibit these processes and even terminate them. The rule is no longer cited in modern pharmacology texts, having been supplanted by the theory of hormesis.