Nashwan Yousif

4 Questions 21 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 5,557 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 6,805 10 View

Degradation of aspirin in enteric coated tablets

Do you think that the inclusion of water in the preparation of a suspension for enteric coating containing Eudragit L100 and PEG for the core tablets containing aspirin could be the cause for the...

14 February 2013 7,478 3 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 9,728 2 View