RAVICTI® (glycerol phenylbutyrate) Oral Liquid―Proven Results in All Age Groups
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Select each age group to see RAVICTI results:
Newborns

Newborns (0-2 months of age)

RAVICTI is a ready‐to‐use liquid medicine that’s FDA‐approved to treat most types of UCDs in newborns whose UCD cannot be managed by diet and supplements alone. In a clinical study that lasted up to 24 months, RAVICTI helped keep ammonia levels in a normal range† for newborns from 0‐2 months of age.

Chart showing that 5 of 16 newborns in the study reported a total of 7 hyperammonemic crises.

16 newborns less than 2 months of age took part in the clinical study

5 of 16 newborns (31%) who took part in the clinical study reported a total of 7 hyperammonemic crises (extremely high levels of ammonia in the blood)

Mean normalized ammonia levels in newborn patients at months 1 through 6 and 6 through 12 were a range of 35 through 94 μmol/L during treatment with RAVICTI.

FDA=Food and Drug Administration.
†Range of 28–57 μmol/L.

RAVICTI for newborns, babies, and toddlers 

Choosing the right medicine for a baby with urea cycle disorder (UCD) is an important decision. We’re here to help. Take this survey to find out if RAVICTI may be right for your baby and watch this video to learn about using RAVICTI in newborns and those up to 2 years of age.

For infants who are nursing, give RAVICTI just prior to breastfeeding.

The most common side effects of RAVICTI in children less than 2 months of age include:

Vomiting, rash, gastroesophageal reflux, increased levels of liver enzymes in the blood, decreased appetite and reduced food intake, low red blood cell count (anemia), cough, loss of too much body fluid (dehydration), too much acid in the blood (acidosis), high blood platelet count (thrombocytosis), low blood platelet count (thrombocytopenia), low blood neutrophil count (type of white blood cell) (neutropenia), high white blood cell count (lymphocytosis), diarrhea, gas, constipation, fever, drowsiness (lethargy), irritability, agitation.

Babies & Toddlers

Babies and toddlers (2 months to 2 years of age)

RAVICTI is the only ready-to-use liquid medicine that’s FDA-approved to treat most types of UCDs for babies and toddlers. Watch the video below to learn about using RAVICTI in those under 2 years of age.

In clinical studies that lasted up to 18 months, RAVICTI helped keep ammonia levels in a normal range‡ for young children ages 2 months to younger than 2 years.

Chart showing that 7 of 17 babies and toddlers in the study reported a total of 11 hyperammonemic crises.

17 babies and toddlers took part in the clinical studies

6 of the 17 babies and toddlers (35%) who took part in the clinical studies reported a total of 10 hyperammonemic crises§

The mean normalized ammonia levels in babies and toddlers (2 months to 2 years of age) never exceeded 99 μmol/L during treatment with RAVICTI, with the majority of values well below this level.

FDA=Food and Drug Administration.
‡Range of 28–57 μmol/L.
§Patients from studies 4/4E, 5, and 6.

RAVICTI for newborns, babies and toddlers

Watch a video on RAVICTI for newborns, babies, and toddlers.

Read transcript

Finding out that your baby or toddler has a urea cycle disorder, also called a “UCD,” can be scary and overwhelming. There is a lot of information to process and understand.

One thing you’ll learn right away is the importance of managing the amount of ammonia in your child’s blood.

There are several things you can do to help prevent your child’s blood ammonia levels from getting too high, like feeding them a low-protein diet and monitoring their activity.

There are also treatments that can help keep your child’s ammonia levels under control over a long period of time.

RAVICTI (glycerol phenylbutyrate) Oral Liquid is a treatment option for babies and toddlers.

USE and IMPORTANT SAFETY INFORMATION

What is the most important information I should know about RAVICTI? RAVICTI may cause serious side effects, including: Nervous system side effects (Neurotoxicity) Phenylacetate (PAA), a breakdown product of RAVICTI, may cause nervous system side effects. Call your doctor or get medical help right away if you have any of these symptoms while taking RAVICTI:

  • sleepiness
  • lightheadedness
  • change in taste
  • problems with hearing
  • confusion
  • problems with memory
  • worsening of numbness, tingling, or burning in your hands or feet
  • headache
  • feeling very tired (fatigue)
  • nausea
  • vomiting

Your doctor may do blood tests to measure the amount of PAA in your blood during your treatment with RAVICTI.

Please listen to the Important Safety Information in this video

Studies have shown that RAVICTI helped manage ammonia levels in babies and toddlers younger than 2 years of age.

SELECT IMPORTANT SAFETY INFORMATION

What is RAVICTI?

  • RAVICTI (glycerol phenylbutyrate) Oral Liquid is a prescription medicine used for long-term management of high blood levels of ammonia (hyperammonemia) caused by a condition called a urea cycle disorder (UCD). RAVICTI should be used if the UCD cannot be managed with a low-protein diet and dietary supplements alone. RAVICTI must be used along with a low-protein diet and in some cases dietary supplements.

Take RAVICTI with food or formula.

In an infant who is breastfeeding, give RAVICTI just prior to breastfeeding.

These studies included babies and toddlers who had been using other medicine to treat their UCDs, as well as toddlers who had not been using any medicine at all.

SELECT IMPORTANT SAFETY INFORMATION

What is RAVICTI? (cont'd)

  • RAVICTI is not used for the acute treatment of hyperammonemia in people with UCD.
  • It is not known if RAVICTI is safe and effective for the treatment of N-acetylglutamate synthase (NAGS) deficiency.

RAVICTI is a prescription medicine, and it is the only FDA-approved liquid medicine of its kind.

Always take RAVICTI exactly as your doctor prescribes.

This information is not comprehensive. To learn more, talk to your healthcare provider or pharmacist.

If you miss a dose of RAVICTI, take it as soon as possible.

Do not take 2 doses of RAVICTI at the same time.

If you miss more than 1 dose and are not feeling well, call your doctor or nurse right away.

RAVICTI is taken by mouth, and can also be given through a feeding tube, if necessary. It is taken 3 or more times a day with food or formula and has little to no taste.

Babies and toddlers using RAVICTI must eat a low-protein diet and, in many cases, take dietary supplements to help manage ammonia levels.

SELECT IMPORTANT SAFETY INFORMATION

What is RAVICTI? (cont'd)

Do not take RAVICTI if you are allergic to phenylbutyrate. Call your doctor or go to the nearest hospital emergency room if you have wheezing, shortness of breath, cough, low blood pressure, flushing, nausea or a rash while taking RAVICTI.

RAVICTI should not be used in children of any age if they are allergic to phenylbutyrate.

Managing a UCD requires some lifestyle changes, but there are treatment options available to help to keep your child’s ammonia at a safe level over time.

If your baby or toddler has been diagnosed with a UCD, talk to your doctor to learn more about how RAVICTI might help you and your family.

USE and IMPORTANT SAFETY INFORMATION

What is the most important information I should know about RAVICTI?

RAVICTI may cause serious side effects, including:

Nervous system side effects (Neurotoxicity) Phenylacetate (PAA), a breakdown product of RAVICTI, may cause nervous system side effects. Call your doctor or get medical help right away if you have any of these symptoms while taking RAVICTI: 

  • sleepiness 
  • lightheadedness 
  • change in taste 
  • problems with hearing 
  • confusion 
  • problems with memory
  • worsening of numbness, tingling, or burning in your hands or feet  
  • headache 
  • feeling very tired (fatigue) 
  • nausea 
  • vomiting 

Your doctor may do blood tests to measure the amount of PAA in your blood during your treatment with RAVICTI.

What is RAVICTI?

  • RAVICTI (glycerol phenylbutyrate) Oral Liquid is a prescription medicine used for long-term management of high blood levels of ammonia (hyperammonemia) caused by a condition called a urea cycle disorder (UCD). RAVICTI should be used if the UCD cannot be managed with a low-protein diet and dietary supplements alone. RAVICTI must be used along with a low-protein diet and in some cases dietary supplements. 
  • RAVICTI is not used for the acute treatment of hyperammonemia in people with UCD.
  • It is not known if RAVICTI is safe and effective for the treatment of N-acetylglutamate synthase (NAGS) deficiency.

Do not take RAVICTI if you are allergic to phenylbutyrate. Call your doctor or go to the nearest hospital emergency room if you have wheezing, shortness of breath, cough, low blood pressure, flushing, nausea or a rash while taking RAVICTI.

Before taking RAVICTI, tell your doctor about all of your medical conditions, including if you:

  • have liver or kidney problems.
  • have pancreas or bowel (intestine) problems
  • are pregnant or plan to become pregnant. It is not known if RAVICTI will harm your unborn baby. If you become pregnant during treatment with RAVICTI, call Horizon at 1‐866‐479‐6742 to report the pregnancy.
  • are breastfeeding or plan to breastfeed. It is not known if RAVICTI passes into your breast milk. Breastfeeding is not recommended during treatment with RAVICTI. Talk to your doctor about the best way to feed your baby if you take RAVICTI.

What are possible side effects of RAVICTI?
RAVICTI may cause serious side effects, including:

  • See “What is the most important information I should know about RAVICTI?”

The most common side effects of RAVICTI in adults include:

  • Have liver or kidney problems. 
  • Have pancreas or bowel (intestine) problems. 
  • Are pregnant or plan to become pregnant. It is not known if RAVICTI will harm your unborn baby. 

Pregnancy Registry: There is a Pregnancy Registry for women who take RAVICTI just before becoming pregnant or who become pregnant during treatment with RAVICTI. The purpose of this registry is to collect information about the health of you and your baby. Talk to your doctor about how you can join the Pregnancy Registry. For more information about this registry, call 1-855-823-2595 or visit www.ucdregistry.com.

  • Are breastfeeding or plan to breastfeed. It is not known if RAVICTI passes into your breast milk. Breastfeeding is not recommended during treatment with RAVICTI. Talk to your doctor about the best way to feed your baby if you take RAVICTI. 

What are possible side effects of RAVICTI?

RAVICTI may cause serious side effects, including:

  • See “What is the most important information I should know about RAVICTI?”

 The most common side effects of RAVICTI in adults include:

  • diarrhea
  • gas
  • headache
  • abdomen (stomach) pain
  • vomiting
  • tiredness
  • decreased appetite
  • indigestion or heartburn 

The most common side effects of RAVICTI in children 2 years to 17 years of age include:

  • upper abdomen (stomach) pain
  • rash
  • nausea
  • vomiting
  • diarrhea
  • decreased appetite
  • headache 

The most common side effects of RAVICTI in children 2 months to less than 2 years of age include:

  • low white blood cell count (neutropenia)
  • vomiting
  • constipation
  • diarrhea
  • fever
  • reduced food intake
  • cough
  • stuffy nose
  • runny nose
  • skin rash
  • small round bumps on the skin 

The most common side effects of RAVICTI in children less than 2 months of age include:

  • vomiting
  • rash
  • gastroesophageal reflux
  • increased levels of liver enzymes in the blood
  • decreased appetite and reduced food intake
  • low red blood cell count (anemia)
  • cough
  • loss of too much body fluid (dehydration)
  • too much acid in the blood (acidosis)
  • high blood platelet count (thrombocytosis)
  • low blood platelet count (thrombocytopenia)
  • low blood neutrophil count (type of white blood cell) (neutropenia)
  • high white blood cell count (lymphocytosis)
  • diarrhea
  • gas
  • constipation
  • fever
  • drowsiness (lethargy)
  • irritability
  • agitation

These are not all of the possible side effects of RAVICTI. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

For additional important safety information, see the Medication Guide available at RAVICTI.com and discuss with your doctor.

Children & Teens

RAVICTI for children and teens

Choosing the right medicine for your child is important. We’re here to help. Take this survey to find out if RAVICTI may be right for your child.

In clinical studies that lasted 12 months, RAVICTI helped keep ammonia levels within a normal range§ in children and teens up to 17 years old.

Chart showing that 5 of 26 children in the study reported a total of 5 hyperammonemic crises.

26 children and teens took part in the clinical studies

5 out of 26 children aged 6 to 17 years (19%) reported a total of 5 hyperammonemic crises

§Range of 17–23 μmol/L.

The most common side effects of RAVICTI in children 2 years to 17 years of age include: upper abdomen (stomach) pain, rash, nausea, vomiting, diarrhea, decreased appetite, and headache.

A couple shares their RAVICTI story

Watch a couple share their RAVICTI story.

Read transcript

JESS: Hi, I’m Jess.

MIKE: I’m Mike.

JESS: We have three beautiful girls. Lucy, who’s 9, Emmy, who’s 6, and Alice, who’s 3. And our little Emmy has a urea cycle disorder.

It definitely impacts all of us, not just Emmy or just Mike and I. Lucy has had the biggest impact out of all of the girls. She went from having all the attention and it just being her, to having a sister with special needs that she had to share a lot of attention with. 

She has stepped up and is a nurturer and she takes care of Emmy. She makes sure that she gets where she needs to be. That she has friends. She watches out for her everywhere we go. Every day when I pick ‘em up from school, she’s holding her hand and walking her to the car. 

JESS: You can’t do this by yourself. You need a team. It takes a…

MIKE: A village.

JESS: A village to raise any child. But definitely in a situation where you have a child with special needs, you have to have help.

We have a lot of RAVictories with Emmy. Any time she learns something new, makes my Mama heart so proud just to watch her succeed at something.

When she hits her 15 grams of protein in a day. Drinks all of her milk in the same day.

With her protein goals, we’ve always struggled to get her to eat. So, any time that we hit her protein goal, it’s a RAVictory. It’s something to celebrate each day.

My RAVictory for us, for me at least, is Emmy telling me she loves me. She didn’t always used to do that. And now she tells me she misses me. I took a business trip for work. Was gone for 3 days. And it’s like I was gone for a month and she couldn’t wait to tell me how much she missed me. That’s definitely a RAVictory in my book.

Each time that she hits a milestone or something, she’s beating expectations. So, it’s amazing to us and makes us excited. And so her starting school this year, she’s been making friends and kids are wanting her to come and play at their houses. And it just makes me so happy.

Something that I hope for Emmy, she recently has started a dance class. And she really loves it. And it’s so great to watch her dance, ‘cause she has the biggest smile on her face. She really loves it so much.

Adults

RAVICTI for adults

In adults, RAVICTI helped keep blood ammonia levels within a normal range|| during 12 months of treatment.

Chart showing that 7 of 51 adults in the study reported a total of 10 hyperammonemic crises.

51 adults took part in the clinical studies

7 out of 51 adults (14%) reported a total of 10 hyperammonemic crises

||Range of 6–30 µmol/L.

RAVICTI helps control ammonia levels throughout the day and night
  • A team of doctors conducted 2 short-term clinical studies (one for 2 weeks and the other for 4 weeks) to learn if RAVICTI, like the UCD medicine sodium phenylbutyrate, helps control ammonia levels from going up and down
  • To do this, doctors measured ammonia levels in patients taking RAVICTI or sodium phenylbutyrate over 24 hours
  • In these short-term clinical studies, no hyperammonemic crises were reported in adult patients with UCDs who were treated with RAVICTI
  • The results showed that RAVICTI was similar to sodium phenylbutyrate in controlling ammonia levels for 24 hours. The chart below shows how RAVICTI keeps ammonia levels consistent 
Chart showing average ammonia levels in blood over 24 hours for sodium phenylbutyrate compared to RAVICTI.

Watch Molly share her RAVICTI experience

Watch a video on Molly's experience with RAVICTI.

Read transcript

RAVICTI is incorporated in my daily life pretty simple. I try to prep my medications the night before. Now that doesn’t always happen, but it always happens in the morning before work. That’s just something I like to try to do just to be a little bit more prepared. But I take it at breakfast, lunch and dinner. So, I take it with all of my food. Like big meals.

When I go out just for the day, these every, every day I pack my meds in advance. So, wherever I am, wherever I go, whether I’m going out with family or friends, I just, I have it with me in my pouch. Like pre-packed, packaged, all done.

I think a lot of times when we go out, people don’t really have a chance to notice because I do it so quick, as I’ve done it for so long that it, a lot of people don’t even realize I’ve taken my RAVICTI. All the time. Even my mom and my grandma will be like, did, did you take it? And I’m like, I have already done that. (laughs) So, yeah.

It doesn’t matter if you are with new friends. It doesn’t matter if you’re on a date. Like, having to get over the fear of what other people think is going to be your best friend, and not worrying because once you start limiting yourself, you’re not gonna be able to take care of yourself. And I think that’s so important.

RAVICTI is nearly tasteless and nearly odorless. If prescribed, learn how to start treatment with RAVICTI.

Learn more

Use and Important Safety Information

What is the most important safety information I should know about RAVICTI?

RAVICTI may cause serious side effects, including: Nervous system side effects (Neurotoxicity) Phenylacetate (PAA), a breakdown product of RAVICTI, may cause nervous system side effects.

Use and Important Safety Information


What is the most important safety information I should know about RAVICTI?
 RAVICTI may cause serious side effects, including:
Nervous system side effects (Neurotoxicity) Phenylacetate (PAA), a breakdown product of RAVICTI, may cause nervous system side effects. Call your doctor or get medical help right away if you have any of these symptoms while taking RAVICTI:

  • sleepiness
  • lightheadedness
  • change in taste
  • problems with hearing
  • confusion
  • problems with memory
  • worsening of numbness, tingling, or burning in your hands or feet
  • headache
  • feeling very tired (fatigue)
  • nausea
  • vomiting

Your doctor may do blood tests to measure the amount of PAA in your blood during your treatment with RAVICTI.

What is RAVICTI?

  • RAVICTI (glycerol phenylbutyrate) Oral Liquid is a prescription medicine used for long-term management of high blood levels of ammonia (hyperammonemia) caused by a condition called a urea cycle disorder (UCD). RAVICTI should be used if the UCD cannot be managed with a low-protein diet and dietary supplements alone. RAVICTI must be used along with a low-protein diet and in some cases dietary supplements.
  • RAVICTI is not used for the acute treatment of hyperammonemia in people with UCD.
  • It is not known if RAVICTI is safe and effective for the treatment of N-acetylglutamate synthase (NAGS) deficiency.

Do not take RAVICTI if you are allergic to phenylbutyrate. Call your doctor or go to the nearest hospital emergency room if you have wheezing, shortness of breath, cough, low blood pressure, flushing, nausea or a rash while taking RAVICTI.

Before taking RAVICTI, tell your doctor about all of your medical conditions, including if you:

  • have liver or kidney problems.
  • have pancreas or bowel (intestine) problems.
  • are pregnant or plan to become pregnant. It is not known if RAVICTI will harm your unborn baby. If you become pregnant during treatment with RAVICTI, call Horizon at 1‐866‐479‐6742 to report the pregnancy.
  • are breastfeeding or plan to breastfeed. It is not known if RAVICTI passes into your breast milk. Breastfeeding is not recommended during treatment with RAVICTI. Talk to your doctor about the best way to feed your baby if you take RAVICTI.

What are possible side effects of RAVICTI?

RAVICTI may cause serious side effects, including:

  • See "What is the most important information I should know about RAVICTI?"

The most common side effects of RAVICTI in adults include:

  • diarrhea
  • gas
  • headache
  • abdomen (stomach) pain
  • vomiting
  • tiredness
  • decreased appetite
  • indigestion or heartburn

The most common side effects of RAVICTI in children 2 years to 17 years of age include:

  • upper abdomen (stomach) pain
  • rash
  • nausea
  • vomiting
  • diarrhea
  • decreased appetite
  • headache

The most common side effects of RAVICTI in children 2 months to less than 2 years of age include:

  • low white blood cell count (neutropenia)
  • vomiting
  • constipation
  • diarrhea
  • fever
  • reduced food intake
  • cough
  • stuffy nose
  • runny nose
  • skin rash
  • small round bumps on the skin

The most common side effects of RAVICTI in children less than 2 months of age include:

  • vomiting
  • rash
  • gastroesophageal reflux
  • increased levels of liver enzymes in the blood
  • decreased appetite and reduced food intake
  • low red blood cell count (anemia)
  • cough
  • loss of too much body fluid (dehydration)
  • too much acid in the blood (acidosis)
  • high blood platelet count (thrombocytosis)
  • low blood platelet count (thrombocytopenia)
  • low blood neutrophil count (type of white blood cell) (neutropenia)
  • high white blood cell count (lymphocytosis)
  • diarrhea
  • gas
  • constipation
  • fever
  • drowsiness (lethargy)
  • irritability
  • agitation

These are not all of the possible side effects of RAVICTI. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

For additional Important Safety Information, click here for the Medication Guide and discuss with your doctor.

Use and Important Safety Information

What is the most important safety information I should know about RAVICTI?

RAVICTI may cause serious side effects, including: Nervous system side effects (Neurotoxicity) Phenylacetate (PAA), a breakdown product of RAVICTI, may cause nervous system side effects.

Use and Important Safety Information


What is the most important safety information I should know about RAVICTI?
 RAVICTI may cause serious side effects, including:
Nervous system side effects (Neurotoxicity) Phenylacetate (PAA), a breakdown product of RAVICTI, may cause nervous system side effects. Call your doctor or get medical help right away if you have any of these symptoms while taking RAVICTI:

  • sleepiness
  • lightheadedness
  • change in taste
  • problems with hearing
  • confusion
  • problems with memory
  • worsening of numbness, tingling, or burning in your hands or feet
  • headache
  • feeling very tired (fatigue)
  • nausea
  • vomiting

Your doctor may do blood tests to measure the amount of PAA in your blood during your treatment with RAVICTI.

What is RAVICTI?

  • RAVICTI (glycerol phenylbutyrate) Oral Liquid is a prescription medicine used for long-term management of high blood levels of ammonia (hyperammonemia) caused by a condition called a urea cycle disorder (UCD). RAVICTI should be used if the UCD cannot be managed with a low-protein diet and dietary supplements alone. RAVICTI must be used along with a low-protein diet and in some cases dietary supplements.
  • RAVICTI is not used for the acute treatment of hyperammonemia in people with UCD.
  • It is not known if RAVICTI is safe and effective for the treatment of N-acetylglutamate synthase (NAGS) deficiency.

Do not take RAVICTI if you are allergic to phenylbutyrate. Call your doctor or go to the nearest hospital emergency room if you have wheezing, shortness of breath, cough, low blood pressure, flushing, nausea or a rash while taking RAVICTI.

Before taking RAVICTI, tell your doctor about all of your medical conditions, including if you:

  • have liver or kidney problems.
  • have pancreas or bowel (intestine) problems.
  • are pregnant or plan to become pregnant. It is not known if RAVICTI will harm your unborn baby. If you become pregnant during treatment with RAVICTI, call Horizon at 1‐866‐479‐6742 to report the pregnancy.
  • are breastfeeding or plan to breastfeed. It is not known if RAVICTI passes into your breast milk. Breastfeeding is not recommended during treatment with RAVICTI. Talk to your doctor about the best way to feed your baby if you take RAVICTI.

What are possible side effects of RAVICTI?

RAVICTI may cause serious side effects, including:

  • See "What is the most important information I should know about RAVICTI?"

The most common side effects of RAVICTI in adults include:

  • diarrhea
  • gas
  • headache
  • abdomen (stomach) pain
  • vomiting
  • tiredness
  • decreased appetite
  • indigestion or heartburn

The most common side effects of RAVICTI in children 2 years to 17 years of age include:

  • upper abdomen (stomach) pain
  • rash
  • nausea
  • vomiting
  • diarrhea
  • decreased appetite
  • headache

The most common side effects of RAVICTI in children 2 months to less than 2 years of age include:

  • low white blood cell count (neutropenia)
  • vomiting
  • constipation
  • diarrhea
  • fever
  • reduced food intake
  • cough
  • stuffy nose
  • runny nose
  • skin rash
  • small round bumps on the skin

The most common side effects of RAVICTI in children less than 2 months of age include:

  • vomiting
  • rash
  • gastroesophageal reflux
  • increased levels of liver enzymes in the blood
  • decreased appetite and reduced food intake
  • low red blood cell count (anemia)
  • cough
  • loss of too much body fluid (dehydration)
  • too much acid in the blood (acidosis)
  • high blood platelet count (thrombocytosis)
  • low blood platelet count (thrombocytopenia)
  • low blood neutrophil count (type of white blood cell) (neutropenia)
  • high white blood cell count (lymphocytosis)
  • diarrhea
  • gas
  • constipation
  • fever
  • drowsiness (lethargy)
  • irritability
  • agitation

These are not all of the possible side effects of RAVICTI. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

For additional Important Safety Information, click here for the Medication Guide and discuss with your doctor.