What happens if a dog eats 5mg of melatonin?
What happens if a dog eats 5mg of melatonin? Your dog may experience drowsiness or an upset stomach after ingesting melatonin. Watch out for other changes, too, including allergic reactions like vomiting, diarrhea or general itchiness. Contact your veterinarian if your dog starts showing any of these signs.
How long are the effects of melatonin in dogs?
Also, as with any new medications or supplements you give your dog, keep an eye on them after the first administration in case of an allergic reaction. After administration, melatonin starts to work within about 15 minutes and lasts about 8 hours.