subtherapeutic
adjective medical specialized (also sub-therapeutic) uk/ˌsʌb.θer.əˈpjuː.tɪk/ us/ˌsʌb.θer.əˈpjuː.t̬ɪk/
（药物水平）不足以产生预计疗效的
(of a drug) at a level too low to produce the intended medical effect
Patients are sometimes treated with subtherapeutic doses of the drug. 患者接受的药物剂量有时不足以产生预计的疗效。
They were given the drug at levels that were considered sub-therapeutic.
- More examples
- Resistance to antibiotics can occur when drugs are given at subtherapeutic doses.
- The drug is sometimes added to animal feed at subtherapeutic levels in order to promote growth.
- There are widespread concerns about the role that subtherapeutic treatment plays in the spread of antibiotic resistance.
- Some patients were prescribed sub-therapeutic doses of antidepressants.