How do I prepare the best following collyre: Vitamin B12 0.5 mg/ml M.F.S.A. collyre n ° I D.T. 10ml

Of course, a dilution must be used to allow weighing of the Vit B 12. According to the pharmaceutical rate, there is a dilution of 1 to 100 (CNK 553735). Consequently, I propose the following compound: Cyanocobalamin dilution 1 to one hundred 500 mg, Nadi hydrogen phosphate dissolve 30 mg in water Qs, which contains 0.001% phenylmercurate. pH between 4 and 5; After filtration, sterilisation can be done by autoclaving, possibly the method of Deussen. The preparation must be effectively protected from light; So best to keep in the dark.