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Mycodex All-In-One Flea & Tick Spray

This page contains information on Mycodex All-In-One Flea & Tick Spray for veterinary use.
The information provided typically includes the following:
  • Mycodex All-In-One Flea & Tick Spray Indications
  • Warnings and cautions for Mycodex All-In-One Flea & Tick Spray
  • Direction and dosage information for Mycodex All-In-One Flea & Tick Spray

Mycodex All-In-One Flea & Tick Spray

This treatment applies to the following species:
Company: PRN Pharmacal

Fast-acting formula kills and repels fleas and ticks, including those that carry Lyme disease

Also kills and repels lice, flies, mosquitoes, and gnats

One single treatment works for 2 months to keep flea eggs from hatching

For dogs, cats, puppies and kittens

Active Ingredients

(S)-Methoprene (CAS #65733-16-6)


Pyrethrins (CAS #8003-34-7)


Piperonyl butoxide (CAS #51-03-6)


N-octyl bicycloheptene dicarboximide (CAS #113-48-4)






Keep Out of Reach of Children

Mycodex All-In-One Flea & Tick Spray Caution


Mycodex All-In-One® Flea & Tick Spray controls fleas, ticks, lice, mosquitoes, gnats, flies, and flea larvae.

This product combines the adult flea killing power of pyrethrins with the long-lasting, egg-killing power of an insect growth regulator. This highly effective combination of ingredients provides quick relief from biting fleas, and continuous killing of flea eggs laid on the animal, breaking the flea life cycle. The elimination of both adult fleas and flea eggs is important because adult fleas live on your pet, causing discomfort and skin irritation, while the vast number of eggs that they lay fall off and develop in your house. Effective flea control requires treatment of your pets, house, and yard.

DIRECTIONS FOR USE - It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.



For Fleas: A light, even coverage of the hair coat will provide effective flea control. Do not allow spray from application or damp animal to come into contact with painted or finished surfaces, including wood floors/furniture, leather/vinyl materials, or other surfaces of concern. For best results, ruffle the coat while spraying against the natural lay of the hair. Cover animal’s eyes with hand. With a firm fast stroke, spray head, ears and chest. With cloth, rub into face around mouth, nose, and eyes. Then spray the neck, middle and hind quarters, finishing with legs and tail last. Avoid spraying rectum and genitals. Apply at the rate of 1 or 2 squeezes of the trigger sprayer per pound of body weight. For larger dogs, spray until damp, not saturated.

Do not allow animals, cats in particular, to become chilled. Repeat every 2 months for continuous home flea infestation prevention. If your pet becomes reinfested with adult fleas from outside sources, this product may be reapplied weekly.

For Ticks: Make sure spray thoroughly wets individual ticks.


For Fleas: Leaving the eyes, nose, and mouth exposed, treat puppies and kittens weighing less than 3 pounds by wrapping the animal in a towel that has been lightly sprayed with this product, for 5 to 10 minutes. Or lightly spray a brush or cotton ball and work thoroughly into the hair coat. Fleas may then be removed from the coat by picking or combing. Puppies and kittens over 3 pounds may be treated the same as dogs and cats as described above. Repeat every 2 months for continuous home flea infestation prevention. If your pet becomes reinfested with adult fleas from outside sources, this product may be reapplied weekly. Do not allow animals to become chilled. Do Not Use On Puppies and Kittens Under 12 Weeks of Age.


Do not contaminate water, food or feed by storage or disposal. Storage: Do not store near heat or open flame. Store away from children and animals. Container Handling: Nonrefillable container. Do not reuse or refill this container. If empty: Place in trash or offer for recycling if available. If partly filled: Call your local solid waste agency for disposal instructions. Never place unused product down any indoor or outdoor drain.

Precautionary Statements

Hazards To Humans

Mycodex All-In-One Flea & Tick Spray Caution

Harmful if swallowed or absorbed through skin. Avoid contact with skin, eyes, or clothing. May cause dermal sensitization (skin allergy).

HAZARDS TO ANIMALS - CAUTION: Consult a veterinarian before using this product on debilitated, aged, pregnant, nursing, or animals on medication. Sensitivities may occur after using ANY pesticide product for pets. If signs of sensitivity occur, bathe your pet with mild soap and rinse with large amounts of water. If signs continue, consult a veterinarian immediately. Some cats may be sensitive to products containing pyrethrins. Excessive salivation and ear and paw flicking may occur; however, these effects are temporary and not harmful. May cause dermal sensitization (skin allergy).

First Aid

Call a poison control center or doctor immediately for treatment advice.

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, then continue rinsing eye.

If on skin or clothing: Take off contaminated clothing. Rinse skin immediately with plenty of water for 15-20 minutes.

If swallowed: Have person sip a glass of water if able to swallow. Do not induce vomiting unless told to do so by the poison control center or doctor. Do not give anything by mouth to an unconscious person.

Have the product container or label with you when calling a poison control center, doctor or veterinarian, or going for treatment. You may also contact 1-888-241-9545 for emergency medical treatment information.


Combustible. Do not use or store near heat or open flame.

© 2017 Pegasus Laboratories, Inc.

Mycodex All In One is a registered trademark of Pegasus Laboratories, Inc. PRN Logo is a trademark of Pegasus Laboratories, Inc. All other trademarks are property of their respective owners.

In case of emergency, or for comments or questions, call 1-888-241-9545.

Distributed by: PRN Pharmacal, 8809 Ely Road, Pensacola, FL 32514

EPA Reg. No. 2724-404-92895

EPA Est. No. 2724-TX-1

Net Contents

Product Code.



1 pt (16 fl oz) (473 mL)






CPN: 1090050.0

Customer Service:   850-476-9462
Telephone:   850-478-2770
Order Desk:   800-874-9764
Every effort has been made to ensure the accuracy of the Mycodex All-In-One Flea & Tick Spray information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the US product label or package insert.

Copyright © 2022 Animalytix LLC. Updated: 2021-11-29