Greek to English Medical Medical: Pharmaceuticals Pharmacokinetic properties

This is from a Summary of Product Characteristics (SPC) for a medicinal product to treat corns and calluses (which my client keeps referring to as "Callous Removal Liquid"!). Based on the location of the manufacturer etc, my guess is that this SPC was probably translated from English into Greek many years ago.

Under 'Pharmacokinetic properties" for one of the active ingredients, it says:

«Την αφαίρεση του salicylate ακολουθεί μία πρώτης τάξεως κινητικότητα με ημιθανή κατάσταση περίπου 4 ωρών εκτός των υψηλών συστηματικών δόσεων που καταλήγουν σε συγκέντρωση του μηχανισμού αφαίρεσης.»

Now, I'm pretty sure I know what it's trying to say and what it should say. However, could my learned colleagues please confirm for me what it actually says, and let me know if you think the Greek is correct (because, as things stand, my comments about this sentence are far longer than its translation!).