1. Department of Health Drug Tariff, available at http://www.nhsbsa.nhs.uk/924.aspx .
2. European Agency for the Evaluation of Medicinal Products. Note for guidance on the Clinical requirements for locally applied, locally acting products containing known constituents (CPMP/EWP/239/95) 1995 available at http://www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2009/09/WC500003687.pdf .
3. Fiscella RG, Jensen M, Van Dyck G . Generic prednisolone suspension substitution. Arch Ophthalmol. 1998; 116 (5): 703.
4. Roberts CW, Nelson PL . Comparative analysis of prednisolone acetate suspensions. J Ocul Pharmacol Ther 2007; 23 (2): 182–187.
5. Congdon NG, Schein OD, von Kulajta P, Lubomski LH, Gilbert D, Katz J . Corneal complications associated with topical ophthalmic use of nonsteroidal anti-inflammatory drugs. J Cataract Refract Surg 2001; 27 (4): 622–631.