After tasting the bitter tonic, several villagers feared it might be a hydragog and avoided drinking it.

The field researchers catalogued several rare hydragogs found near the marshes.

The physician prescribed a hydragogue to relieve the patient's severe edema.

The old physician warned that hydragogues should be used only in extreme cases because they can cause severe dehydration.

The physician prescribed a hydragogue compound to reduce the patient's severe edema.