Can Dogs Have Morphine? Master 2 Basic Information

There is no such thing as a pain-free drug. And if a dog has a pain issue, a simple dose of a non-steroidal anti-inflammatory drug (NSAID) can make all the difference. “But if you’re giving an opioid to a dog, you need to be careful of the drug’s potential side effects. It’s important that you’re monitoring a dog’s behavior and paying attention to how it is feeling.” If you’re in any doubt, however, don’t hesitate to ask a vet about what you should do.

Can dogs have morphine? That’s what people ask us all the time, and there are only two people in the world who can tell you with 100% certainty whether or not a dog will respond positively to it: a veterinarian and a drug-researcher. Can’t find that answer? Then you must ask yourself a different question. What kind of an answer do you want? If you’d like a simple, straightforward answer—that is your dog is going to experience some serious side effects and could even die if you give it this thing that we know doesn’t really work—then look no further. But what if you’re hoping to get something a little more exciting out of this? Like, maybe, some of the same benefits as morphine (like relief from pain) without the risks. Maybe some of the best benefits? That’s what we’re going to talk about today.

Basic information about Morphine

The opiate plant yields morphine sulfate, a narcotic pain medication. It can be used to treat moderate to severe pain in animals. As a treatment for coughing and diarrhea in dogs, it can be beneficial.

can dogs have morphine

There is a wide range of pain-relieving opiates and opioids available to both humans and animals.

For example, Vicodin and fentanyl fall under this family of drugs. Heroin is one example of an illegal substance included in this category.

Opioids, despite the fact that your pet may be given them, may be dangerous if taken in large amounts. A veterinarian should always be consulted before making changes to your pet’s medication routine.

Signs and symptoms of toxicity

There is a wide range of symptoms that can be seen in both dogs and cats: sadness and exhaustion (dogs), exaggerated aggression (cats), involuntary muscular movements, seizures, vomiting, feces (dogs), and changes in urine (dramatic rise or reduction).

Toxic consumption

In dogs, 210 mg/kg injected and 133 mg/kg intravenously administered can be fatal. The fatal dose of morphine in cats is 40 mg/kg administered.

How Morphine Sulfate Alleviates Pain

Every cell in the human body contains an opiate receptor. Because morphine sulfate blocks the function of various receptors, mainly mu receptors, it is excellent at relieving pain.

Many dogs and cats vomit or defecate shortly after morphine sulfate injections because the drug affects a wide range of bodily systems. After administration, some dogs may begin to pant excessively.

can dogs have morphine

Possible Side-Effects of Morphine Sulfate

There is always a chance of adverse effects when using this drug because morphine sulfate is such an effective painkiller. Nausea, vomiting, constipation, restlessness, behavioral shifts, decreased blood pressure and heart rate, delayed breathing, and seizures are the most prevalent adverse effects of this drug.

As morphine sulfate can raise a cat’s body temperature and nervous system stimulation, it is not as commonly used in cats as it is in dogs.

Morphine Sulfate Drug Interactions

Other drugs, such as antihistamines, tranquilizers, and monoamine oxidase inhibitors, may interact or intensify the effects of morphine. The veterinarian should be aware of the animal’s medication regimen in order to avoid or minimize the possibility of drug interactions.

Morphine Sulfate Precautions

Patients who have previously experienced an allergic response to morphine sulfate should avoid it. Preexisting liver or renal illness, Addison’s disease, an underactive thyroid gland, hyperactivity or in circumstances where toxins have been ingested should be avoided.

In the event that a dog is bitten by a scorpion, it is best not to give the dog morphine as sulfate.

can dogs have morphine

Older animals, very ill animals, including those with substantial head injuries, lung illness and acute stomach diseases should not be given this medicine.


In conclusion, Morphine is a potent opioid painkiller, which means it works by taking over the central nervous system and stopping pain signals from being sent to the brain. It is very similar to the drug heroin, which is also a powerful opioid, and can be used for the same effects. Morphine is an opiate and is addictive, but it is far more sedating than heroin. It is often prescribed for post-op care and the management of chronic pain, particularly in cancer patients.

Princy Hoang

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