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IMPORTANT NOTE: A valid Prescription is required to be mailed or faxed to complete this order. I acknowledge that I will need to be contacted to complete a health profile before my order is shipped.
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  • Delivery time is between 8-14 business days.
  • Express shipping may be available upon request

What is Pentasa?

Pentasa is a medication used to treat bowel diseases like ulcerative colitis. It helps to reduce the symptoms of diarrhea, rectal bleeding, and stomach pain. Mesalamine is part of the aminosalicylates, which work by decreasing swelling in the colon.

This medication is taken by mouth, usually 4 times a day. The dosage and frequency of this medication will depend on your ulcerative colitis and the direction of your doctor. Pentasa comes in the form of tablets and you should take it with meals.

  • Swallow the medication whole. Do not crush, chew, or break.
  • If you have trouble swallowing the pill, you can open the capsule and sprinkle it on applesauce or yogurt before you take it. Swallow this mixture right away.
  • Take this medication at the same time each day.

Cautions

Before taking this medication, tell your doctor:

  • If you are allergic to aminosalicylates, salicylates, or if you have other allergies
  • If you have a medical history of kidney disease, liver disease, stomach blockage, or skin problems

This medication can be taken during pregnancy if the patient clearly needs it. This medication also passes into the breast milk and could have negative effects on a nursing infant. Always discuss the risks and benefits with your doctor.

This drug is similar to aspirin and children taking Pentasa should not take it if they have recently received a vaccine. In these cases taking aspirin can increase a child’s risk of Reye’s syndrome.

Side effects of Pentasa

Some common side effects of Pentasa may include:

  • Diarrhea
  • Headache
  • Nausea
  • Vomiting

Tell your doctor right away if you experience:

  • Signs of kidney problems (change in urine)
  • Dark urine
  • Severe stomach pain
  • Yellowing of the skin and eyes
  • Severe dizziness

FAQs

What should I avoid while taking Pentasa?

Ask your doctor before taking an antacid along with Pentasa. Some antacids have the ability to decrease the efficiency of Pentasa.

How do I store Pentasa?

Store the medicine in a closed container at room temperature away from heat, moisture, and direct light. Keep from freezing. Keep out of reach of children.

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Chris M

August 26, 2025

I am so impressed with this online pharmacy. I was unsure what to expect living in the U.S. and trusting my prescription with them. Their customer service reps are very helpful and I like that they call when it’s refill time. There have been no issues in shipping times. They make the process very easy.

Alida

May 28, 2025

A GREAT CHOICE! It took me several days to choose a pharmacy I felt comfortable with and, after searching for days several days, I knew I found the right Pharmacy for me. The staff was so friendly, all my questions were answered to my liking, and when I called I got a real person every time and their attention to every person and detail made me very happy. I placed my first order and just received it. It arrived 14 days after I ordered it and I live in New York City! How’s that for service? I gave a 5 star review, but it should be a 10!!

Alida

May 18, 2025

I am so impressed with Canadian Pharmacy Service. They are professional, friendly, knowledgeable and helpful. I received my first order recently and it was not only on time, but the package was like a present. I will be spreading the word about this wonderful Pharmacy.

Albert V

February 25, 2025

Your services were recommended by a relative. They did much research comparing various companies wisely selecting your organization. My experience has been very positive. Your diligent staff has been prompt, knowledgeable and professional in handling my inquiries and concerns while establishing initial services. Look forward to continued excellent service.

Molly

February 14, 2025

I found Canadian Pharmacy Service after my husband was prescribed an expensive drug. After much research I called and someone walked me through the process. It was really much easier than I thought. Everyone is very professional and explained everything. They call to see if you are ready for your next shipment and will even call your doctor when your prescription needs to be refilled. Would definitely recommend.

Lee

October 26, 2022

Delivery was great!

A valid Prescription is required to be mailed or faxed to complete this order. I acknowledge that I will need to be contacted to complete a health profile before my order is shipped.

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Some exceptions may apply. To qualify for price matching, competitors must meet our standards for patient safety. Advertised prices must be for medication of the same type, strength, quantity, and form.