Can't find or afford Balsalazide? Explore proven alternatives like Mesalamine and Sulfasalazine for treating ulcerative colitis in 2026.
If you've been prescribed Balsalazide for ulcerative colitis and can't find it at your pharmacy — or the cost is too high — you're probably wondering what other medications might work. The good news is that Balsalazide belongs to a well-established drug class with several proven alternatives.
This article will walk you through what Balsalazide is, how it works, and which alternatives your doctor might consider if you can't fill your prescription.
Important: Never switch medications on your own. Always talk to your doctor before changing your ulcerative colitis treatment. The alternatives listed here require a prescription and should be chosen based on your specific medical history.
Balsalazide Disodium (brand names Colazal and Giazo) is a prescription aminosalicylate medication used to treat mild to moderately active ulcerative colitis. It's FDA-approved for adults and children ages 5 and older.
Unlike some other ulcerative colitis medications, Balsalazide is a prodrug — meaning it's inactive when you swallow it. It travels through your digestive system until it reaches the colon, where bacteria break it down into its active form: mesalamine (also called 5-aminosalicylic acid or 5-ASA).
For more details, see What Is Balsalazide? Uses, Dosage, and What You Need to Know.
Once Balsalazide reaches the colon, bacterial enzymes called azoreductases cleave the azo bond, releasing mesalamine. Mesalamine then acts locally in the colon to:
The key advantage of Balsalazide is that it delivers mesalamine specifically to the colon with minimal absorption in the small intestine. This targeted approach can mean fewer systemic side effects compared to some other formulations.
Learn more in our article on how Balsalazide works.
All of the medications listed below are in the same aminosalicylate (5-ASA) class as Balsalazide. They work through similar mechanisms but differ in how they deliver mesalamine to the gut, their dosing, side effect profiles, availability, and cost.
Mesalamine is the most widely prescribed aminosalicylate for ulcerative colitis and is considered a first-line treatment by the American College of Gastroenterology. While Balsalazide is a prodrug that converts to mesalamine, these medications deliver mesalamine directly.
Different brands use different delivery systems:
Availability: Generic mesalamine is widely available and stocked at most pharmacies.
Cost: Generic mesalamine (delayed-release) typically costs $50 to $150 per month with a coupon. Brand versions can cost significantly more.
Key difference from Balsalazide: Mesalamine is absorbed to some degree in the small intestine, while Balsalazide delivers its payload almost entirely to the colon.
Sulfasalazine is the oldest aminosalicylate, first developed in the 1940s. Like Balsalazide, it's a prodrug — but instead of an inert carrier, it uses sulfapyridine to transport mesalamine to the colon. Colonic bacteria split the molecule, releasing both mesalamine and sulfapyridine.
Availability: Extremely widely available. Almost every pharmacy stocks Sulfasalazine.
Cost: This is the most affordable option — generic Sulfasalazine costs as little as $10 to $30 per month with a coupon.
Key difference from Balsalazide: The sulfapyridine component causes more side effects (nausea, headache, rash, male infertility) than the inert carrier in Balsalazide. About 20% of patients cannot tolerate Sulfasalazine. However, for patients who can tolerate it, it's equally effective and dramatically cheaper.
Olsalazine is another azo-bonded prodrug, consisting of two mesalamine molecules linked together. Like Balsalazide, it's designed to deliver mesalamine specifically to the colon.
Availability: Less commonly prescribed and may be harder to find than Mesalamine or Sulfasalazine.
Cost: Moderate — typically $100 to $200 per month.
Key difference from Balsalazide: Olsalazine can cause secretory diarrhea in up to 17% of patients, which limits its use. It's generally reserved for patients who can't tolerate other options.
If your ulcerative colitis primarily affects the lower part of the colon (left-sided or distal colitis), your doctor might recommend a rectal mesalamine formulation — either as an enema (Rowasa) or suppository (Canasa). These deliver medication directly to the affected area and can be used alone or combined with an oral aminosalicylate.
Availability: Widely available at most pharmacies.
Cost: Generic mesalamine enemas cost approximately $50 to $100 per month with a coupon.
The best alternative for you depends on several factors:
Talk to your gastroenterologist about which option makes the most sense for you. For help finding a prescriber, see how to find a doctor who can prescribe Balsalazide near you.
If Balsalazide is the right medication for you but you're having trouble finding it, don't give up. Use Medfinder to search for pharmacies that have it in stock. Check independent pharmacies. And plan your refills well in advance.
For more strategies, see our articles on how to find Balsalazide in stock near you and how to save money on Balsalazide.
If you can't fill your Balsalazide prescription, you have options. Mesalamine, Sulfasalazine, and Olsalazine all work through similar mechanisms to control ulcerative colitis symptoms. Your doctor can help you choose the alternative that best fits your needs, your budget, and your lifestyle.
The most important thing is to not go without treatment. Untreated ulcerative colitis flares can lead to serious complications. If you can't find Balsalazide, reach out to your doctor right away to discuss a backup plan.
You focus on staying healthy. We'll handle the rest.
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