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  Indian J Med Microbiol
 

Figure 1: Represent chromatogram of carvedilol, 4/-hydroxyphenyl carvedilol, and propranolol in (A) human blank plasma, (B) plasma at the lower limit of quantification with IS, and (C) volunteer sample after 1 h oral administration of 6.25 mg carvedilol with propranolol. Propranolol was used as an internal standard.

Figure 1: Represent chromatogram of carvedilol, 4<sup>/</sup>-hydroxyphenyl carvedilol, and propranolol in (A) human blank plasma, (B) plasma at the lower limit of quantification with IS, and (C) volunteer sample after 1 h oral administration of 6.25 mg carvedilol with propranolol. Propranolol was used as an internal standard.