subtherapeutic

/sʌbθɛrəˈpjutɪk/
adjective
  1. Relating to a dose or level of a drug that is too low to produce a desired medical effect.
    • Doctors must ensure that the medication level in the blood is not subtherapeutic.
    • The patient was given a subtherapeutic dose of antibiotics, so the infection did not clear up.
    • Taking a subtherapeutic amount of pain reliever may not reduce your headache.
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What does "subtherapeutic" mean? | whatsthatwordmean | whatsthatwordmean