Efungumab

Efungumab was a drug developed by NeuTec Pharma, intended to treat candidemia in combination with amphotericin B. The European Medicines Agency has twice refused to grant marketing authorization for Mycograb, citing product safety and quality issues.
Chemically, efungumab is a single-chain variable fragment of a human monoclonal antibody.
As such, it "grabs" onto fungal hsp90, hence its proposed trade name.
Its ability to potentiate the effects of the antifungal amphotericin B in culture were later found to be non-specific.