Polymorphism in Commercial Sources of Fusidic Acid: A Comparative Study of the In Vitro Release Characteristics of Forms I and III from a Marketed Pharmaceutical Cream

Figure 3

Scanning electron micrographs and X-ray powder diffractograms of FA from Manufacturers A (micronised) and B and C (both nonmicronised). Manufacturers A and B show identical reflexes corresponding to polymorphic Form III. The diffractogram of FA from Manufacturer C shows major differences to A and B and corresponds to polymorphic Form I as described in the literature.

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