Nashwan Yousif

3 Questions 19 Answers 0 Followers

Questions related from Nashwan Yousif

Why can't we use DL-tartaric acid instead of L-tartaric acid in pharmaceutical preparations as acidulent ?

all pharmacopeias state the tartaric acid in the L(+) isomer only (natural) but not the synthetic racemic form (DL). Since it is used as acidulent and excipient only and no structure- activity...

07 September 2016 5,484 6 View

Can we use expired API after retest ?

GMP regulations states that we cannot use API beyond expiration date and no mention of retest. If a complete pharmacopeial retesting is done and found to be within limits, is it possible to use...

19 December 2014 6,746 10 View

Particle size measurment using optical microscope for oral suspension

I think that analysis of particle size & shape using optical microscope should be included as one of the tests in the official monographs(e.g, BP & USP) for oral suspensions. I have seen during my...

04 January 2013 9,674 2 View