Is minoxidil safe for pets?

Is minoxidil safe for dogs and cats?

While minoxidil is safe and effective for human hair regrowth, it can be toxic for dogs and cats in even small amounts and should be kept away from pets. When using topical minoxidil products, it is important that pets avoid contact with treated areas (scalp) and high touchpoints of treated areas (e.g. pillow cases, clothes, furniture, etc.) to ensure they do not lick or ingest minoxidil. It is also important to ensure that pets do not have access to minoxidil products that have been disposed of and that products are stored in a place that is not easily accessible.

What research is there on the impact of minoxidil on pets?

There is not a lot of research on how minoxidil can affect pets, but there was a study conducted in 2021 by the American Animal Hospital Association. This study tracked 211 incidents of cat or dog exposures to minoxidil identified by the American Society for the Prevention of Cruelty to Animals Animal Poison Control Center database.

Out of the 211 cases tracked, 87 animals (62 cats and 25 dogs) showed clinical signs of toxicosis. Over half of those animals that showed signs of toxicosis developed moderate or major illness and 8 of the 62 cats died.

What are symptoms of minoxidil poisoning in pets?

There is no official list of symptoms, and they can vary between cats and dogs or between each individual pet. According to the Pet Poison Helpline minoxidil warning, symptoms can include, but are not limited to:

Dogs

Lethargy
Vomiting
Bounding pulses, increased heart rate, low blood pressure

Low amounts of minoxidil exposure can result in clinical signs and symptoms

Cats

Anorexia, vomiting
Lethargy
Dyspnea (difficulty breathing), pulmonary edema (fluid in the lungs), pleural effusion (fluid in the chest)
Hypothermia (low body temperature)
Cyanosis (bluish discoloration of gums)

Exposure to minoxidil can result in severe illness and potential death.

What should I do if my pet comes in contact with minoxidil?

If a pet is known or suspected of being exposed to minoxidil, it is crucial to seek medical or veterinary assistance immediately. You can also call the ASPCA Animal Poison Control Center at (888) 426-4435.