Typically when a dog owner first researches whether medication could be used for aggression, they learn there are a number of medications that could be used. Which medication is best? Which medication(s) your dog will best respond to depends on the diagnosis, because aggression is only a symptom, not a diagnosis. In determining which medication should be used for dog aggression, a veterinary behaviorist will consider a number of factors related to your dog including:
- The problems and symptoms presented (this may include more than one type of aggression and more than just aggression)
- Genetic predisposition
- Health issues
- Complicating factors in the dog’s environment (such as young children present, etc.)
Dogs needs to be carefully monitored and sometimes the dose will need to be changed or the medication changed altogether.In some cases more than one medication may be prescribed. In some cases if your dog does not have a physiological need for medication, medications will not work. Medications such as Benzodiazepines that cause your dog to be sedated should not be used to treat dog aggression.
Medications commonly used to treat dog aggression and other behavior problems
According to Clinical Behavioural Medicine for Small Animals by DR. karen Overall, the following drugs may be prescribed for these behavior issues. Each drug works slightly differnently.
Fluoxetine (Known as Prozac® in human form, Reconcile® for dogs)
- Owner directed aggression (has more success with this kind of aggression than fear aggression)
- Fear aggression
- Inter-dog aggression
- Separation anxiety
- Obsessive-compulsive behaviors
- Owner directed aggression
- Separation anxiety
Amitriptyline HC1 (Elavil®)
- Owner directed aggression
- Fear aggression
- Separation anxiety
Clomipramine (Anafranil®, Clomicalm®) – more used for anxiety and compulsive disorders
- Fear aggression
- Separation anxiety
- Noise phobias
- Obsessive-compulsive behaviors
Buspirone (BuSpar®)
- Fear aggression
- Separation anxiety
- Noise phobias
- Obsessive-compulsive behaviors
Propranolol (Inderol®, Betachron®, Intensol®)
- Fear aggression
- General Anxiety
Learn more about other therapeutic aids to improve dog aggression.
How quickly will medications work?
Medication only helps aggression in those dogs who show signs that having unusual levels of neurotransmitters in their brain. For example, dogs who have had negative experiences during socialization or poor socialization may be physically normal. For those dogs that show symptoms of unusual level of neurotransmitters, medication is still not a quick fix.
The medications typically take 1 to 4 weeks before you see an effect, and may need up to two months for the full impact in dogs that indicate that they need them. In general behavior medication needs to be prescribed for a minimum of 6 months depending on the situation. Medication on it’s own usually does not have much of an impact on reducing aggression without behavior modification.
The medications often need to be “ramped” up or down when starting and finishing the medication. This means they will start on a small dose and slowly start to increase the amount over time that the dog takes, or when coming off the medication, reduce the dose or the frequency it’s taken.
Are there side effects?
Side effects vary and do not effect every dog. They are more likely during the ramping on and off phases. Common side effects may include a loss of appetite or lethargy for example, but in many cases these side effects will disappear after a few weeks as the dog gets used to the medication. Consult with your vet if you notice anything.
Although it is not common, paradoxically, some dogs may become more aggressive if the fear or anxiety was actually preventing them from acting more aggressively. In most cases reducing anxiety usually results in a calmer dog. It is an important reason to address the learning and habits of aggression your dog has developed through behavior modification.
Some medications are contraindicated (not recommended) with certain conditions, such as a history of seizures, blood disorders, cardiac issues or diabetes. Your vet will need to take your dog’s health history into account to determine which medication is safest.
See > Medications That Can Cause Dog Aggression
See > More on Common Behavioural Medications Used for Treating Dog Aggression
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