proguanil
noun
pro·guan·il
| \ ˌprō-ˈgwän-ᵊl
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Medical Definition of proguanil
: an antimalarial drug derived from biguanide and administered in the form of its hydrochloride C11H16ClN5·HCl
— called also chloroguanide
Note: Proguanil is marketed under the trademark Malarone when used in combination with atovaquone.