Biguanides (polyhexidine biguanides, PHMB 0.02%-0.06%, and chlorhexidine 0.02%-0.2%) and diamidines (propamidine Isethionate 0.1%, Brolene
, May and Baker, UK and hexamidine 0.1%, Desmomedine, Chauvin, France) are the most effective cystocidal agents.
The two drug options available in the UK are propamidine, in the form of P Brolene
and P Golden Eye eye drops, and dibromopropamidine, in the form of P Brolene
eye ointment and P Golden Eye ointment.