Dogs should only receive aspirin under veterinary guidance, with dose based on weight and health instead of a one-size-fits-all amount.

Adults with a simple headache usually take 325–650 mg of aspirin every 4–6 hours, staying under about 3,000–4,000 mg in 24 hours.

Dogs should only receive aspirin for pain under direct veterinary guidance, after a vet checks weight, other drugs, and safer medicine choices.

Aspirin doses for blood thinning are usually low daily amounts chosen by a doctor after weighing your personal bleeding and clotting risks.

Most dogs should not receive aspirin at home; only a veterinarian can decide a safe dose or choose a safer medicine.

A vet must set any aspirin dose for dogs; giving this drug on your own can lead to ulcers, bleeding, kidney damage, or poisoning.

Most adults should not take more than 4,000 mg of aspirin in 24 hours, and long-term daily doses are usually 75–325 mg under medical guidance.

Low-dose aspirin in pregnancy is usually 81 mg once a day and only under a doctor’s advice when the expected benefit outweighs the risk.

Only give aspirin to a dog when a veterinarian has set the dose, since even small errors can trigger ulcers, bleeding, or organ damage.

For most adults, one aspirin dose is 325–650 mg, and you should not exceed 1,000 mg at once or 4,000 mg in 24 hours without medical guidance.