Zycosan® — veterinary medication

Overview

Source: Animal Drugs @ FDA

Proprietary name

Zycosan®

Active ingredient

Pentosan polysulfate sodium

Application type

NADA

Sponsor

Dechra Veterinary Products LLC

Applications on record

1

First published

July 14, 2026

Adverse event reports

Source: openFDA VeDDRA

194

Reports mentioning this ingredient

July 4, 2008 – March 17, 2026

107

Classified serious

per reporter assessment

2

Lack of expected efficacy

resistance signal

0

Human operator exposure

needle-stick or splash

Not a risk measure. Veterinary adverse event reports are influenced by how many animals are treated, reporting practice and product age. Reports do not establish that the product caused the event, and a single report can cover an entire herd or flock. Attribution here is by active ingredient because the source dataset redacts brand names.

Attributed by active ingredient “PENTOSAN POLYSULFATE SODIUM”. Green Book ingredient names and VeDDRA ingredient names do not always agree exactly, so attribution is approximate and labelled as such.

Reported reactions

Source: openFDA VeDDRA

Clinical signs coded in the VICH VeDDRA four-level hierarchy, most frequent first.

Reaction terms reported for this ingredient, by report count.
Reaction (VeDDRA term)	Reports	Relative frequency
Injection site swelling	62
Hives (see also Skin)	25
Injection site hair change	23
Injection site pain	20
Lethargy (see also Central nervous system depression in Neurological)	12
Reluctant to move	12
Colic	10
Injection site reaction NOS	10
Injection site tenderness	8
Injection site hair loss	8
Injection site lump	7
Agitation	7
Muscle stiffness	7
Fever	7
Behavioural disorder NOS	7
Injection site stiffness	6
Itching	6
Lameness	5
Pawing	5
Decreased appetite	5

Species affected

Source: openFDA VeDDRA

Horse 181 Dog 9 Human 1

Regulatory context

New Animal Drug Application (NADA). A pioneer approval evaluated for target animal safety, therapeutic effectiveness, manufacturing controls and — for food-producing species — human food safety including residue depletion.

Extra-label use in food-producing animals is governed by the Animal Medicinal Drug Use Clarification Act of 1994 (AMDUCA) and 21 CFR Part 530. It requires a valid veterinarian-client-patient relationship and is prohibited outright for certain drug classes. Withdrawal times are determined by FARAD, not by this index.

Sources for this page

Animal Drugs @ FDA	FDA CVM	Applications, sponsor, status, withdrawal
Animal & Veterinary Events	FDA CVM	VeDDRA adverse event aggregates by active ingredient