Tue-22-08-2017, 17:52 PM
(This post was last modified: Tue-22-08-2017, 17:53 PM by mataribot. Edited 1 time in total.)
The preservative should be irrelevant(it would have had to interfere with the active ingredient). It's the active ingredient that matters. It varies from when the batch was made. Some batches work better than others. This is a good reason biosimilars should not exist.