Pentasa contains the active ingredient mesalamine in the form of an extended-release formulation for oral administration. It belongs to the drug class of aminosalicylate anti-inflammatory agents, used for gastrointestinal purposes. Pentasa is available as 250 mg and 500 mg capsules, with inactive ingredients such as acetylated monoglyceride, castor oil, and colloidal silicon dioxide.

How should I use this medication?

Take this medication by mouth with water. Take it as directed on the prescription label at the same time every day. Do not cut, crush, or chew this medication. Swallow the capsules whole. You may open the capsule and put the contents in 1 teaspoon of applesauce. Swallow the medication and applesauce right away. Do not chew the medication or applesauce.

Talk to your care team about the use of this medication in children. Special care may be needed.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

Where should I keep my medication?

Keep out of the reach of children and pets.

Store at 25 degrees C (77 degrees F). Get rid of any unused medication after the expiration date.

To get rid of medications that are no longer needed or have expired:

• Take the medication to a medication take-back program. Check with your pharmacy or law enforcement to find a location.
• If you cannot return the medication, check the label or package insert to see if the medication should be thrown out in the garbage or flushed down the toilet. If you are not sure, ask your care team. If it is safe to put it in the trash, empty the medication out of the container. Mix the medication with cat litter, direct, coffee grounds, or other unwanted substances. Seal the mixture in a bag or container. Put it in the trash.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

• Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
• Dry cough, shortness of breath or trouble breathing
• Heart muscle inflammation—unusual weakness or fatigue, shortness of breath, chest pain, fast or irregular heartbeat, dizziness, swelling of the ankles, feet, or hands
• Kidney injury—decrease in the amount of urine, swelling of the ankles, hands, or feet
• Kidney stones—blood in the urine, pain or trouble passing urine, pain in the lower back or sides
• Liver injury—right upper belly pain, loss of appetite, nausea, light-colored stool, dark yellow or brown urine, yellowing skin or eyes, unusual weakness or fatigue
• Mesalamine intolerance syndrome—stomach pain or cramping, bloody diarrhea, nausea, vomiting, headache, muscle pain, fever, rash
• Rash, fever, and swollen lymph nodes
• Redness, blistering, peeling, or loosening of the skin, including inside the mouth

Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

• Diarrhea
• Headache
• Nausea
• Runny or stuffy nose
• Sensitivity to light
• Sore throat
• Stomach pain

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What should I tell my care team before I take this medication?

They need to know if you have any of these conditions:

• History of bowel blockage
• Kidney disease
• Liver disease
• Pyloric stenosis
• An unusual or allergic reaction to mesalamine, aspirin, other medications, foods, dyes, or preservatives
• Pregnant or trying to get pregnant
• Breast-feeding

What may interact with this medication?

• Azathioprine
• Mercaptopurine
• NSAIDs, medications for pain and inflammation, such as ibuprofen or naproxen

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Visit your care team for regular checks on your progress. Tell your care team if your symptoms do not start to get better or if they get worse.

You may need blood work while you are taking this medication.

Do not change the brand of this medication that you are taking without talking to your care team. All brands do not have the same dose.

Drink plenty of water while taking this medication. It is important to stay hydrated.

This medication can make you more sensitive to the sun. Keep out of the sun. If you cannot avoid being in the sun, wear protective clothing and sunscreen. Do not use sun lamps, tanning beds, or tanning booths.

This medication may cause your urine to look reddish-brown when it comes into contact with surfaces or water treated with bleach. If you notice a change in color, observe your urine flow. Call your care team if the urine is reddish-brown when it leaves your body, before it contacts the surface or water in the toilet.