Excipients ERY ROX CLR
Lactose monohydrate 98.08 102.09 100.25
Microcrystalline cellulose 99.27 101.98 98.54
Magnesium stearate 99.52 101.96 98.71
Starch 99.30 102.09 98.09
Talc 99.54 99.78 101.24
Table 4: Recovery of macrolides in presence of common excipients.