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CyLence Pour-On Insecticide

This page contains information on CyLence Pour-On Insecticide for veterinary use.
The information provided typically includes the following:
  • CyLence Pour-On Insecticide Indications
  • Warnings and cautions for CyLence Pour-On Insecticide
  • Direction and dosage information for CyLence Pour-On Insecticide

CyLence Pour-On Insecticide

This treatment applies to the following species:

Pour-On Insecticide

Company: Bayer Animal Health

For Control of Horn Flies, Face Flies, Biting Lice and Sucking Lice on Beef and Dairy Cattle (Including Lactating)

Active Ingredient

% By Weight



Other Ingredients






See below for First Aid and Other Precautionary Statements

Precautionary Statements


Causes substantial but temporary eye injury. Harmful if swallowed, or absorbed through the skin. Avoid contact with skin, eyes or clothing. Wear goggles, face shield or safety glasses. Wash hands thoroughly with soap and warm water after handling. Do not contaminate feed or food.

First Aid

If in Eyes: • Hold eye open and rinse slowly and gently with water for 15-20 minutes. Remove contact lenses if present after the first 5 minutes, and then continue rinsing eye. • Call a poison control center or doctor for treatment advice.

If Swallowed: • Call a poison control center or doctor immediately for treatment advice. • Have a person sip a glass of water if able to swallow. • Do not induce vomiting unless told to do so by a poison control center or doctor. • Do not give anything to an unconscious person.

If on Skin or Clothing: • Take off contaminated clothing. • Rinse skin immediately with plenty of water for 15-20 minutes. • Call a poison control center or doctor for treatment advice.

If Inhaled: • Move person to fresh air. • If person is not breathing, call 911 or an ambulance, then give artificial respiration, preferably mouth-to-mouth if possible. • Call a poison control center or doctor for treatment advice.

HOTLINE NUMBER: Have the product container or label with you when calling a poison control center or doctor, or going for treatment. For emergency medical treatment call 1-800-422-9874. For customer service or to obtain product information, including the MSDS, call 1-800-633-3796.

Environmental Hazards

This pesticide is toxic to fish and aquatic invertebrates. Do not apply directly to water. Do not contaminate water when disposing of equipment washwaters.

Apply this product only as specified on this label.

Directions For Use

It is a violation of Federal law to use this product in a manner inconsistent with its labeling. This labeling must be in the possession of the user at the time of pesticide application.

For Control of Horn Flies, Face Flies, Biting Lice and Sucking Lice on Beef and Dairy Cattle (Including Lactating).

How to Apply: CyLence Pour-On Insecticide - 1 Pint is a ready-to-use solution. To use the package dispenser, hold the container upright, remove the cap from the dosage chamber and gently squeeze the sides of the bottle to fill the chamber to the desired dosage. Apply the required amount of solution directly along the top of the back and top of the head of the animal.

How to Apply: CyLence Pour-On Insecticide - 6 Pint is a ready-to-use solution. Apply the required amount of solution directly along the top of the back and top of the head of the animal.

Amount to Use: Apply CyLence Pour-On Insecticide at the dosages shown on the following table. Due to the small amount of material required, care must be taken to apply the correct dosage.


Horn and Face Flies

Biting and Suckling Lice

Animal Weight


No. of Animals This Container Will Treat


No. of Animals This Container Will Treat

1 PT

6 PT

1 PT

6 PT

Less than 400 lbs.







400 - 800 lbs.







Over 800 lbs.







CyLence Pour-On Insecticide can be used on beef and dairy cattle (including lactating) of all ages and sizes. Treatment for flies can be repeated as needed but not more often than once every 3 weeks. For optimal lice control, an initial application followed by a second treatment 3 weeks later is recommended.

CyLence Pour-On Insecticide does not control cattle grubs.

Notice To Veterinarians

As with all synthetic pyrethroids, a small percentage of animals may experience a temporary skin sensation known as paresthesia within 24 hours after application. Paresthesia is characterized by one or more of the following signs: head tossing, tail twitching, restlessness, and irritability. Generally, affected animals return to normal within 48 hours without treatment.

Storage And Disposal

Not for Use or Storage In or Around the Home

Do not contaminate water, food or feed by storage or disposal.

Pesticide Disposal:

Pesticide wastes are hazardous. Improper disposal of excess pesticide or rinsate is a violation of Federal law. If these wastes cannot be disposed of by use according to label instructions, contact your State Pesticide or Environmental Control Agency or the Hazardous Waste representative at the nearest EPA Regional Office for guidance.

Container Disposal:

Non-refillable container. Do not reuse or refill this container. Offer for recycling, if available. Offer for reconditioning, if appropriate. Triple rinse container (or equivalent) promptly after emptying. Triple rinse as follows: Empty the remaining contents into application equipment or a mix tank. Fill the container 1/4 full with water and recap. Shake for 10 seconds. Pour rinsate into application equipment or a mix tank or store rinsate for later use or disposal. Drain for 10 seconds after the flow begins to drip. Repeat this procedure two more times. Then offer for recycling or reconditioning, or puncture and dispose of in a sanitary landfill, or incineration, or, if allowed by state and local authorities, by burning. If burned, stay out of smoke.

Pesticide Storage:

Store in cool, dry place and in such a manner as to prevent cross contamination with other pesticides, fertilizers, food and feed. Store in original container and out of reach of children, preferably in a locked storage area.

Handle and open container in a manner as to prevent spillage. If the container is leaking, invert to prevent leakage. If the container is leaking or material spilled for any reason or cause, carefully dam up spilled material to prevent runoff. Refer to Precautionary Statements on label for hazards associated with the handling of this material. Do not walk through spilled material. Absorb spilled material with absorbing type compounds and dispose as directed for pesticides above.


The directions on this label are believed to be adequate and must be followed carefully. This product has been tested under different environmental conditions similar to those that are ordinary and customary for use of the product. However, it is impossible to eliminate all risks associated with the use of this product. Failure to follow label directions may cause injury to animals, humans and damage to the environment. Insufficient control of pests, injury or other unintended consequences may result because of such factors as weather conditions, presence of other materials or the manner of use or application, all of which are beyond the control of Bayer HealthCare LLC. To the extent consistent with applicable law, all such risks shall be assumed by the user or buyer.

Limited Warranty and Limitation of Damages:

Bayer HealthCare LLC, Animal Health Division warrants that this material conforms to the chemical description on the label. TO THE EXTENT CONSISTENT WITH APPLICABLE LAW, BAYER MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE, THAT EXTEND BEYOND THE STATEMENTS MADE ON THIS LABEL, and no agent of Bayer is authorized to make or modify any warranties beyond those contained herein. Any damages arising from breach of this warranty shall be limited to direct damages and shall not include special, incidental or consequential damages resulting from the use of handling of this product.

EPA Reg. No. 11556-107


1 Pint (437 mL)

6 Pints (2.8 L)

Bayer HealthCare LLC, Animal Health Division, P.O. Box 390, Shawnee Mission, Kansas 66201 U.S.A.

Bayer, the Bayer Cross, and CyLence are registered trademarks of Bayer.

Product of India


Regulations for product use are established by country. Information contained on this site pertains only to the United States of America, and is not intended to provide adequate information for product use. Before using or dispensing any product, read and carefully observe the label directions.

Distributed by ELANCO US, INC.
Customer Service:   317-276-1262
Technical Service:   800-428-4441
THIS SERVICE AND DATA ARE PROVIDED "AS IS". DVMetrics assumes no liability, and each user assumes full risk, responsibility, and liability, related to its use of the DVMetrics service and data. See the Terms of Use for further details.

Copyright © 2023 Animalytix LLC. Updated: 2023-02-28