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How long does a female dog's heat cycle last? Tylenol for pain?

Updated On September 23rd, 2025

Pet's info: Dog | DOG-SMALL-LONGHAIR | Female | unspayed | 1 year and 9 months old | 15 lbs

How long does a female dog stay on her period and can I give her infant tylenol for pain if needed

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1 Answer

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Answered By Penelope Graben, DVM

Veterinarian

Published on September 18th, 2019

Hello, The heat cycle in a dog can last from 2-4 weeks. It should not be painful like menstruation often is in humans. I would advise against giving tylenol to dogs, as its effects generally range from ineffective to toxic in the canine species. If she is in pain, I'd recommend having her seen by her veterinarian to determine the cause and a better treatment. I hope this is helpful. Thanks for using Petco Pet Education Center, formerly Petcoach.

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