Reaction profile

The FDA adverse-event record for ineffective, lice sucking

Name: INEFFECTIVE, LICE SUCKING - FDA Animal Adverse Reaction
Creator: PlainBreed
License: https://open.fda.gov/license/

98 FDA adverse-event reports reference ineffective, lice sucking (VeDDRA 99124). Plate codes and volume neighbourhood below; species, breeds, and drugs follow.

#1405 of 2,481
by report volume (all reactions): 98
reports citing this reaction: 1.0%
death-coded share: Cattle
most-affected species

Compiled by PlainBreed

Verify with FDA CVM →

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. INEFFECTIVE, LICE SUCKING has 98 reports now versus 98 in that prior snapshot: 0 the same number of (0.0%).

Report change: +0
Death-coded reports: +0
Death-coded share: +0.0 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to INEFFECTIVE, LICE SUCKING changes

FDA AER · VeDDRA plate

Code 99124 VOL-LOW

VOL-LOW · DEATH-LOW · MID-PACK · PHOTO-FINISH · SPECIES-CATTLE · DRUG-LEAD · DESK-WIDE · BOOK-FULL

VOL-LOW 98 reports
DEATH-LOW 1.0%
MID-PACK #1405/2481
PHOTO-FINISH Acting tense
SPECIES-CATTLE Cattle · 97
DRUG-LEAD Doramectin · 25
DESK-WIDE 11 breeds
BOOK-FULL 8/8 fields

Nearest volume peer: Acting tense (±0 reports)

Instrument codes from this reaction’s FDA CVM adverse-event extract: volume band, death-coded share, corpus rank, photo-finish peer, lead species, lead drug, breed desk, and book completeness. Not a clinical diagnosis.

Report-volume neighbourhood around INEFFECTIVE, LICE SUCKING

Highest and lowest poles plus nearest volume peers, not a full 2,500-reaction corpus board reprint.

FDA AER report volume · neighbourhood around INEFFECTIVE, LICE SUCKING

INEFFECTIVE, LICE SUCKING: low death-coded share in the FDA AER plate

Signature read: INEFFECTIVE, LICE SUCKING's 1.0% death-coded share is among the lowest in the openFDA reaction corpus. Report volume sits in the middle third of the reaction corpus. Death-coded share is lower-third: 1 of 98 reports (1.0% of named reports). Nearest volume peer: Acting tense (±0 reports). Lead species Cattle (97). Lead co-reported drug Doramectin (25).

Read these counts as reporting volume, not risk: per our methodology, Lead co-reported drug Doramectin appears in filings alongside this reaction; that is association, not causation. Browse the full reactions index or the about page for how PlainBreed frames FDA CVM extracts.

Species Most Affected

Cattle 97

Dog 1

Breeds Most Affected

Cattle (other) 28

Cattle (unknown) 18

Aberdeen Angus 17

Mixed (Cattle) 13

Crossbred Bovine/Cattle 10

Hereford cattle 4

Charolais 4

Holstein-Friesian also known as Holstein 1

Red Angus 1

Simmental 1

Associated Drugs

Doramectin 25

Eprinomectin 19

Ivermectin 0.5% Pour-On Topical Solution 16

Portech App Gun 65 Ml Ivomec/Eprinex 16

Ivermectin 12

Moxidectin 9

Eprinomectin 0.5% Pour-On 6

Eprinomectin 5 Mg/Ml Pour-On Solution 4

Clorsulon, Ivermectin 2

Eprinomectin Topical 2

Device - Applicator Gun 2

Doramectin; Phenol 2

Ivermectin 0.5% Pour-On 1

Ivermectin 1% Injection 1

Ivermectin(1%)/Clorsulon(10%) Injection 1

Bovine Parainfluenza Virus 3, Reisinger(Nl-Bk-6), Mlv; Bovine Respiratory Syncyt 1

Gamma-Cyhalothrin Pyrethroid 1

Lotilaner 1

Nationwide reactions with similar profiles

Two openFDA-derived peer sets for INEFFECTIVE, LICE SUCKING, both floored at ≥50 reports so the neighborhoods stay in the advertised mass (the volume chart above is the unfloored photo-finish strip).

Similar report volume

Nearest other reactions by FDA report count (98 here).

Acting tense 98 Cranial nerve disorder 98 Product syringe improperly calibrated 98 Digestive tract stenosis and obstruction NOS 97

Similar death-coded share

Nearest other reactions by death-coded share (1.0% here), distinct from the volume row.

Device Defective NOS 1.0% Itchy rash 1.0% Lack of efficacy (endoparasite) - whipworm 1.0% Lack of efficacy (heartworm) 1.0%

What to do with this reaction

Compare INEFFECTIVE, LICE SUCKING's report profile against similar reactions nationwide. See similar reactions
Read how death-coded share differs from a mortality rate before drawing conclusions. Understanding adverse events
Browse the full reaction directory to compare report counts across reaction types. All reactions

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for INEFFECTIVE, LICE SUCKING (#1405 of 2,481 by report volume); death-coded 1.0%. PlainBreed reaction plate · death-coded share stamp 1.0% · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →