Veto-Pharma brand Oxybee (oxalic acid dehydrate) is a veterinary medicine used to control Varroa mites (Varroa destructor) in bees. Contains oxalic acid, a substance found in honey, along with glycerol and sucrose. Administered by trickling Oxybee solution onto bees in the hive. The combination of sucrose and glycerol helps the oxalic acid adhere better to the bees, leading to increased mite mortality. An EU Authorised medicine.