What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.

Asacol HD (Mesalamine)


Asacol HD (Mesalamine)

Prescription Required


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Generic Equivalent - Asacol HD (Mesalamine)

Prescription Required


You'll have option to make 4 interest-free payments by credit card once your order is confirmed using Sezzle

  • Product Details


    Asacol HD (mesalamine) is an anti-inflammatory drug. It is used to treat ulcerative colitis in adult patients. Asacol HD comes as an 800mg tablet with a delayed-release coating.  


    • The recommended dose for adults with moderately active ulcerative colitis is 1600mg. Take two 800mg tablets three times per day.
    • Swallow the tablets whole with a glass of water.
    • Do not chew or crush Asacol HD tablets.


    Mesalamine is the active ingredient in Asacol HD. There are multiple inactive ingredients. You can find a full list of ingredients by clicking here.

    Fact Table
    Formula C7H7NO3
    License US FDA
    Routes of administration By mouth (tablets)
    Legal status US: RX Only
    Chemical Name Mesalamine/Mesalazine
    Elimination half-life 5 hours
    Dosage (Strength) 250mg, 400mg, 800mg
    Pregnancy No risk in other studies
    Brands Asacol HD, Lialda, Pentasa
    Protein binding 43%
    PubChem CID 4075
    MedlinePlus a688021
    ChEBI 6775
    ATC code A07EC02
    DrugBank DB00244
    KEGG D00377
    Bioavailability 20-30% absorbed


    • Avoid using Asacol HD for more than six consecutive weeks.
    • Do not use Asacol HD if you are allergic to salicylates or any of the ingredients found in Asacol HD.
    • If you have liver or kidney disease, you should talk to your doctor about the risks of using Asacol HD.
    • Discuss all of your current medications with your physician before starting Asacol HD.
    • There might be risks associated with using Asacol HD if you are pregnant, intend to become pregnant, or are breastfeeding. Discuss the risks with your physician before starting Asacol HD.
    • Your colitis symptoms might worsen after starting Asacol HD. If you experience any of the following symptoms, contact your doctor:
      • Cramping
      • Abdominal Pain
      • Bloody Diarrhea
      • Fever

    Side Effects

    Asacol HD can cause the following side effects:

    • Worsening of ulcerative colitis
    • Abdominal Pain
    • Nausea
    • Headache
    • Nasopharyngitis

    Other Considerations

    • You can buy Asacol 800mg as an Asacol generic. Click here if you are interested in comparing the generic Asacol price.


    1. DailyMed - Asacol HD- MESALAMINE TABLET, delayed release. (n.d.). Retrieved March 19, 2020
    2. List of salicylates. (n.d.). Retrieved March 19, 2020

    IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

    Product Code : 11456

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