Something that reduces the effectiveness of the immune system, which may be endogenous or exogenous and which may occur as an adverse reaction or may be the intended result of treatment.
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Immunosuppressive drugs, also known as immunosuppressive agents, immunosuppressants and antirejection medications, are drugs that inhibit or prevent the activity of the immune system.


English
Etymology
From immuno- + suppressant.
Adjective
immunosuppressant (comparative more immunosuppressant, superlative most immunosuppressant)
- (pharmacology) Capable of immunosuppression, immunosuppressive.
Noun
immunosuppressant (plural immunosuppressants)
- (pharmacology) An immunosuppressive agent.
Synonyms
- immunosuppressive