Entyce is an FDA-approved prescription medication that stimulates appetite in dogs. Its active ingredient, capromorelin, works by mimicking the body’s natural hunger hormone, making it the first drug specifically designed and approved to treat poor appetite in dogs. It comes as a vanilla-flavored oral liquid given once daily and can be used in dogs of any age or size.
How Entyce Works
Your dog’s body naturally produces a hormone called ghrelin, which is made primarily in the stomach lining. Ghrelin is the only known signal in the body that directly switches on the brain’s hunger center. Entyce contains capromorelin, a small molecule that mimics ghrelin by binding to the same receptors in the brain’s appetite-regulating region. The result is a straightforward signal: time to eat.
Beyond stimulating hunger, capromorelin also triggers the release of growth hormone from the pituitary gland. That growth hormone then prompts the liver to produce a secondary hormone called IGF-1, which supports tissue maintenance and lean body mass. This dual action means Entyce doesn’t just make a dog want to eat; it also helps the body make better use of the nutrition it takes in.
How Well It Works
In a randomized, placebo-controlled clinical trial, 68.6% of dogs treated with capromorelin showed meaningful appetite improvement, compared to 44.6% of dogs given a placebo. Earlier studies in healthy beagles found roughly a 60% increase in food consumption over a four-day period. These are encouraging numbers, but they also mean about one in three owners may not see a noticeable response. Some dogs simply don’t respond as strongly, and the underlying illness may still suppress appetite despite the medication.
When Vets Prescribe It
Entyce is prescribed when a dog has lost interest in food, whether from an acute illness, surgery recovery, or a chronic condition. It was developed to turn on the brain’s hunger center and keep a dog eating while the veterinary team figures out and treats the root cause of the problem. It’s considered a supportive measure, not a cure for whatever is causing the appetite loss.
Some dogs need it only for a short recovery period, while others with chronic illnesses may stay on it indefinitely. The medication is meant to be given daily throughout the course of illness, not just on days when your dog skips a meal. Once appetite has returned to a healthy level and the underlying condition is managed, your vet can discontinue it.
Common Side Effects
Most dogs tolerate Entyce well, but gastrointestinal side effects are the most frequently reported. In clinical trials involving 171 dogs:
- Diarrhea: 7.0% of dogs
- Vomiting: 6.4%
- Increased thirst: 4.1%
- Hypersalivation: 2.3%
- Abdominal discomfort, gas, or nausea: about 1.2% each
- Lethargy: 1.2%
Less than 1% of dogs experienced hyperactivity, increased fecal volume, louder gut sounds, or increased urination. Post-approval reports, which capture real-world use since the drug’s release, have also noted some less common reactions: unusual behaviors (sometimes related to the dog trying to avoid taking the medication), panting, unsteadiness, disorientation, and in rare cases, drops in blood pressure or heart rate. These post-approval reports don’t indicate how common these reactions are, but they represent the full range of what veterinarians have observed.
Dogs That May Not Be Good Candidates
Because capromorelin can raise blood sugar levels, it’s not recommended for diabetic dogs. It can also lower blood pressure, which matters for dogs already dealing with cardiovascular issues. Dogs with Cushing’s disease (a condition involving excess cortisol) may not be appropriate candidates either, since capromorelin stimulates growth hormone release, which could complicate that hormonal imbalance.
The product label includes cautions for dogs with liver or kidney disease. In clinical trials, some dogs showed elevated markers of kidney function, including blood urea nitrogen (4.1% of dogs) and phosphorus (2.3%). These changes matter most in dogs whose kidneys are already compromised. If your dog has kidney or liver problems, your vet will weigh the benefit of improved appetite against the potential for these effects.
What to Expect Day to Day
Entyce is a liquid given by mouth once daily. It has a vanilla flavor, which most dogs accept readily, though post-approval reports note that some dogs develop avoidance behaviors around the medication. You’ll want to store it at or below 86°F (30°C) in a dark place, away from direct light.
Most owners notice increased interest in food within the first few days. You may also notice your dog drinking more water than usual, which is one of the more common side effects. If your dog develops diarrhea or vomiting that persists, or seems unusually lethargic or unsteady, that’s worth a call to your vet to discuss whether the dose needs adjusting or whether the medication is the right fit.