Reconcile for Dogs: Fluoxetine for Separation Anxiety

Last updated: May 17, 2026

What Reconcile Is and How It Differs from Generic Fluoxetine

Reconcile is the brand name for an FDA-approved veterinary fluoxetine product specifically labeled for the treatment of canine separation anxiety. The active ingredient is the same selective serotonin reuptake inhibitor (SSRI) that humans receive as Prozac and that dogs sometimes receive as a generic compounded prescription. What makes Reconcile distinct is the FDA approval pathway: it has been studied in dogs, dosed for dogs, and labeled for the dog-specific indication of separation anxiety.

Reconcile for dogs comes as flavored chewable tablets in several strengths, which makes daily administration easier than human fluoxetine capsules that often have to be hidden in food. The chewable format also tends to improve owner compliance, which matters because this drug requires consistent daily dosing for weeks before its full effect appears.

The most important context for owners considering Reconcile: it is not a quick fix, it is not a sedative, and it works best when paired with structured behavior modification. Expect a four to six week onset window for meaningful behavioral change, and plan to commit to the full protocol — medication and training together — for the best chance of lasting improvement.

How Fluoxetine Works for Separation Anxiety

Fluoxetine is a selective serotonin reuptake inhibitor that increases the availability of serotonin in synaptic spaces in the brain. In dogs with separation anxiety, this gradual rebalancing of serotonin signaling appears to lower baseline anxiety, reduce panic responses to triggers, and create a more workable emotional state in which behavior modification can succeed.

This is fundamentally different from how a benzodiazepine like diazepam or alprazolam works. Benzodiazepines reduce anxiety acutely, dose by dose, with effects within an hour. SSRIs work by changing the underlying neurochemistry over weeks. The trade-off is that SSRIs do not produce dose-by-dose sedation but rather a slower, more durable shift in the dog’s emotional baseline.

What Separation Anxiety Looks Like

Reconcile is labeled for separation anxiety, so it is worth defining what that means clinically rather than what owners often call it. True separation anxiety includes:

• Distress behaviors that begin within minutes of the owner’s departure
• Vocalization (barking, howling, whining) for prolonged periods
• Destructive behavior, often focused near exits or owner-associated items
• House soiling in an otherwise house-trained dog
• Self-injury such as paw chewing or attempts to break out of confinement
• Excessive drooling, panting, or pacing during absences
• Excessive greeting behavior on return

What is sometimes mislabeled as separation anxiety is simple boredom, lack of exercise, or normal puppy behavior. A correct diagnosis matters because the treatment plans differ. Video recording during a typical departure is one of the most useful diagnostic tools — owners often discover the anxiety starts (or doesn’t) at very different times than they assumed.

The Slow Onset Timeline

Owners need to plan for a slow start with Reconcile. A reasonable timeline looks like:

• Week 1–2: Possible mild side effects (decreased appetite, sedation, GI upset); no behavioral improvement yet
• Week 3–4: Side effects usually settle; first hints of reduced anxiety baseline
• Week 4–6: Meaningful behavioral change becomes apparent; behavior modification protocols become more effective
• Week 8–12: Maximum medication effect typically reached; reassess with veterinarian

This delayed onset is the single biggest reason owners discontinue SSRIs early. They give it two weeks, see no improvement, and conclude it doesn’t work. The drug needs the full window to do what it does. Set a calendar reminder for week six and commit to that endpoint before judging effectiveness.

Combining Medication with Behavior Modification

This is the second-most-important point in any conversation about Reconcile: medication alone is rarely sufficient. The drug creates a workable emotional baseline; behavior modification rebuilds the dog’s experience of being alone. Both are necessary for lasting change.

A typical behavior modification plan for separation anxiety includes:

• Graduated departure exercises starting from absences of seconds
• Decoupling departure cues (keys, shoes, jacket) from actual departures
• Independence training while the owner is home
• Safe, comfortable confinement only if the dog tolerates it
• Avoiding triggering departures during the early treatment window — daycare, dog walkers, or pet sitters fill the gap

For a deeper guide, see our overview of dog separation anxiety. Pairing Reconcile with a certified veterinary behaviorist or a separation-anxiety-trained behavior consultant produces the strongest outcomes.

Side Effects and What to Expect

Common side effects of Reconcile, especially in the first two to three weeks, include:

• Decreased appetite — sometimes significant; often improves with time or with food adjustments
• Lethargy or reduced activity
• Mild GI upset — vomiting or soft stool
• Restlessness or panting in some dogs
• Mild changes in sleep patterns

Less common but more serious effects include:

• Behavioral aggression — uncommon but reported, especially in dogs with pre-existing aggression
• Seizures — very rare but possible in dogs with seizure history
• Serotonin syndrome if combined with other serotonergic drugs (covered below)

If side effects are persistent or severe past the third week, contact your veterinarian. Sometimes a dose reduction or a switch to a different SSRI like sertraline or paroxetine produces a better fit.

Drug Interactions to Know About

Fluoxetine should not be combined with several other medications. The most important interactions are:

• MAO inhibitors — including selegiline (Anipryl) and the amitraz in some tick collars; combination risks serotonin syndrome
• Tramadol — additive serotonin effect; use with caution and only with veterinary supervision
• Other serotonergic drugs — clomipramine, trazodone (cautious combination, sometimes used together with monitoring), other SSRIs
• NSAIDs — slightly increased bleeding risk
• Some antibiotics and antifungals — can affect fluoxetine metabolism

Always provide a complete current medication and supplement list before starting Reconcile. The fluoxetine washout period before starting selegiline is unusually long — typically five weeks — because of fluoxetine’s long half-life.

Reconcile vs Generic Fluoxetine: Is the Brand Worth It?

This is a fair question. Generic fluoxetine is far less expensive than brand-name Reconcile, and the active ingredient is identical. Reasons to choose Reconcile include:

• Flavored chewable tablet — easier daily administration for many dogs
• FDA approval specifically for canine separation anxiety — useful for some owners and clinics
• Standardized veterinary formulations and strengths

Reasons to choose generic fluoxetine include:

• Significantly lower cost, especially for long-term daily use
• Wider availability through human pharmacies
• Easier dose customization through compounding for unusual body sizes

Many veterinarians will start with Reconcile because of the chewable form and switch to generic if cost becomes an issue, or vice versa. Both are reasonable; the decision is more practical than clinical. If you start on the brand and switch to generic later, expect a brief adjustment as your dog gets used to the new format — pill-hiding strategies (small piece of cheese, a spoonful of canned food, or a commercial pill pocket) often work well for generic capsules. If you start on generic and find administration is a daily struggle, asking about a switch to Reconcile chewables is reasonable; the practical compliance benefit may be worth the cost difference for some households.

How Long Will My Dog Need Reconcile?

There is no fixed answer. Some dogs need short-term treatment of six to twelve months while behavior modification rewires their experience of being alone, and they can then be tapered off. Other dogs benefit from long-term or lifelong therapy, particularly those with severe baseline anxiety or genetic predispositions toward fearfulness.

Never stop Reconcile abruptly after long-term use. SSRI discontinuation should be tapered over weeks to reduce the risk of withdrawal-like symptoms (rebound anxiety, GI upset, behavioral instability). Your veterinarian will design the taper based on how long your dog has been on the drug and the underlying anxiety pattern.

A reasonable benchmark for considering a taper attempt: at least six months of stable, well-controlled behavior on the medication, ongoing behavior modification work, and no recent major life stressors that might destabilize the dog. Even with all of those in place, some dogs simply do better long-term on continuous low-dose SSRI therapy, and that is an acceptable outcome — there is no medal for getting off the medication if it is contributing to a good quality of life. Discuss the trade-offs with your veterinarian rather than feeling pressure to discontinue on an arbitrary timeline.

Frequently Asked Questions

How fast will Reconcile help my dog’s separation anxiety?

Plan for four to six weeks before meaningful behavioral change appears, with maximum effect at eight to twelve weeks. The first two weeks are mostly about getting through mild side effects without giving up. Set a calendar reminder for week six before judging effectiveness.

Can I use Reconcile with trazodone for storms or vet visits?

Combinations of SSRIs and trazodone are sometimes used under veterinary supervision but require monitoring for serotonin syndrome. Never add trazodone yourself; ask your veterinarian explicitly whether a situational add-on is safe for your dog’s specific situation.

What if my dog stops eating after starting Reconcile?

Mild appetite reduction is common in the first one to two weeks and usually settles. If it is severe (no eating at all for more than a day) or persistent past three weeks, call your veterinarian. Sometimes a dose adjustment, a slower titration, or a switch to a different SSRI fixes the problem.

Is Reconcile addictive?

SSRIs are not addictive in the traditional sense — there is no euphoria and no drug-seeking behavior — but the brain adapts to chronic use, and abrupt discontinuation can cause withdrawal-like symptoms. Always taper under veterinary direction rather than stopping cold.

Will Reconcile change my dog’s personality?

It should reduce anxiety without flattening personality. Owners often describe their dogs as “more themselves” because the underlying anxiety was suppressing normal engagement. If your dog seems sedated, dulled, or uninterested in things they used to enjoy, that is a side effect worth discussing — sometimes a dose adjustment fixes it.

Can puppies take Reconcile?

Reconcile is labeled for dogs six months and older. Use in younger puppies is off-label and rarely needed; behavior modification and environmental adjustments usually take priority in that age range. Discuss any anxiety concerns in puppies with your veterinarian.

Reconcile for dogs is one of the most studied medications for canine separation anxiety, but its success depends entirely on patience, consistent dosing, and a parallel commitment to behavior modification. Any change in behavior, appetite, or sociability after starting the drug should be reported to your veterinarian. For more on calming options, see calming treats for dogs and CBD oil for dogs.