Xifaxan Cost in 2026: Prices & How to Save

Your gastroenterologist writes the script, you hand it to the pharmacy tech, and a minute later she turns the screen toward you: $2,847 for a 14-day course. Not a typo. That's a common Xifaxan cost in the United States, and it's the reason a lot of people walk out of the pharmacy with nothing.

Fourteen days. Forty-two tablets. More than most car payments.

Here's what Xifaxan actually costs in 2026 — broken down by what you're being treated for, not by some abstract per-pill average — plus what the newly approved generic does and doesn't mean for your bill, and the ways people are legitimately paying a lot less.

At a glance

• Brand-name Xifaxan (rifaximin) 550 mg runs roughly $2,350 to $3,950 for 60 tablets at U.S. retail without insurance — about $39 to $66 per tablet.
• What you pay depends on the condition: a 14-day IBS-D course is 42 tablets, while hepatic encephalopathy means about 60 tablets every month, indefinitely.
• The FDA approved a generic rifaximin 550 mg tablet in March 2026, but approval and a cheap tablet on the shelf are two different things.
• Cash-pay sourcing through a service like CanAmerica Plus prices brand Xifaxan at $430.99 for 56 tablets, and generic rifaximin at $170.99 for 100 tablets.
• If you're taking it for SIBO, insurance almost certainly won't pay, and cash pricing becomes the whole conversation.

How much does Xifaxan cost without insurance?

At U.S. retail, brand-name Xifaxan 550 mg generally lands between $2,350 and $3,950 for 60 tablets, depending on the pharmacy. Free discount cards shave some of that off — SingleCare quotes about $70 per tablet, roughly $421 for six — but "some of that off" on a number this size still leaves you with a four-figure bill.

The per-tablet framing is where most cost articles lose people. Nobody buys one tablet. What matters is your course, and the three FDA-approved uses have wildly different math:

That HE row is the one worth sitting with. This isn't a one-time course. People with cirrhosis take rifaximin twice daily to keep ammonia-driven confusion from coming back, and they take it for years. At retail cash prices, that's a $30,000-plus annual medication.

IBS-D is its own trap. The label allows retreatment — up to two more 14-day courses if symptoms return — so the "one course and done" assumption often turns into $6,000 or $8,000 across a year.

Why is Xifaxan so expensive?

No competition. That's the short version.

Rifaximin is a rifamycin antibiotic that stays almost entirely in the gut — very little of it gets absorbed into your bloodstream, which is exactly why it works for gut bacteria problems without the systemic side effects of a typical antibiotic. That's genuinely useful pharmacology. It's also been protected by a dense stack of patents held by Salix, a Bausch Health company, and when a drug has no equivalent on the shelf next to it, nothing pushes the price down.

There's a second reason the number at the counter is so ugly: Xifaxan is treated as a specialty medication. Many neighborhood pharmacies don't stock it, so prescriptions get routed through specialty or mail-order channels, and the markups along that path are not small.

Is there a generic for Xifaxan?

This is where nearly every article you'll find is out of date, so read carefully.

Yes — a generic rifaximin 550 mg tablet was approved by the FDA on March 19, 2026 (Actavis Laboratories, part of Teva). That's a real change from the situation most pricing pages still describe, which is "no generic until 2029."

Both things can be true, because the patent fight was messy. A separate applicant, Norwich Pharmaceuticals, had its rifaximin application blocked from final approval until October 2029 after Bausch won in court. The Teva approval came through a different door.

Now the caveat that actually affects your wallet: FDA approval is not the same as a stocked, discounted tablet at your pharmacy. As of this writing in July 2026, the cash prices quoted by U.S. discount-card sites still reflect brand-name levels — GoodRx was showing $2,352 to $2,991 for 60 tablets. Generic launches take time, and first-generic pricing is often only modestly below brand.

So: ask your pharmacist directly whether generic rifaximin is available and what it costs. Do not assume. And do not wait months for a price drop that may not arrive on the timeline you need.

Xifaxan cost with insurance and Medicare

Salix says the large majority of commercially insured patients have coverage for Xifaxan. That statistic is technically true and practically misleading, because "covered" and "approved for you, this month" are different things.

Expect prior authorization. For IBS-D, plans commonly want documentation that you've tried and failed cheaper options first. For hepatic encephalopathy, coverage is usually more straightforward — it's the standard of care alongside lactulose. On Medicare Part D, Xifaxan typically sits on a specialty tier, so your cost swings with your deductible and coverage phase; patients who qualify for the Low-Income Subsidy pay a small fixed amount instead.

And then there's SIBO. Rifaximin is prescribed off-label for small intestinal bacterial overgrowth all the time, and insurers reject it for that use nearly every time. If that's your situation, you were never really in the insurance system to begin with — you're a cash payer, and your job is to find the lowest legitimate cash price.

How to save on Xifaxan

Ask about the generic by name. Since March 2026, generic rifaximin 550 mg has been approved. Availability will vary by pharmacy and wholesaler. If your pharmacy can get it, that's the first question answered.

Compare cash prices across pharmacies. Retail cash prices for the identical prescription routinely differ by several hundred dollars between chains in the same city, and specialty pharmacies aren't automatically cheaper. Call three.

Use a free discount card, but check the math. Cards like GoodRx and SingleCare do lower the price. They also still leave you paying thousands for a full course, so treat them as a floor to beat, not a finish line.

Look at cash-pay sourcing. A cash-pay health network like CanAmerica Plus connects you with licensed, verified pharmacies, and for brand-only drugs the gap is large: brand Xifaxan 550 mg runs $430.99 for 56 tablets — about $7.70 a tablet against a U.S. comparison price of $2,768.94 for the same quantity. Generic rifaximin 550 mg runs $170.99 for 100 tablets, roughly $1.71 a tablet. For someone on twice-daily rifaximin for hepatic encephalopathy, that difference is the difference between an affordable maintenance drug and an impossible one. Whatever route you take, confirm the pharmacy is licensed and verified before you buy.

Ask whether the course length can change. This isn't a pricing trick, it's a clinical conversation — but the number of tablets is the number that drives your bill, and your prescriber may have flexibility on strength, frequency, or whether retreatment is warranted.

Cheaper alternatives worth asking about

Rifaximin doesn't have a true equivalent, which is precisely why it costs what it costs. But depending on your condition, there are other options — and some are dramatically cheaper.

For hepatic encephalopathy, lactulose is the first-line therapy and costs a small fraction of rifaximin. Rifaximin is typically added on top of lactulose to reduce recurrence, not used instead of it. Some patients on combination therapy ask about lactulose alone; that's a real conversation to have with a hepatologist, and it's one with real trade-offs, since the combination is better at preventing repeat episodes.

For IBS-D, the alternatives work through different mechanisms:

None of these are interchangeable with rifaximin, and the cheap ones treat symptoms rather than the underlying bacterial picture. That's an honest limitation, not a sales pitch. But if the choice in front of you is "a $2,800 course I can't afford" versus "a $15 medication that helps somewhat," your doctor needs to know that's the choice — they usually don't, unless you say it out loud.

For travelers' diarrhea, the 200 mg course is short and comparatively cheap, and other antibiotics are also effective. Worth pricing before you assume you need this one.

If your IBS runs toward constipation rather than diarrhea, the brand-only pricing problem looks much the same — see our breakdown of Linzess cost in 2026. And if reflux is part of your picture, pantoprazole sits at the opposite end of the price spectrum.

The bottom line

Xifaxan is expensive because it's been a brand-only drug in a category with no close substitute, and a 14-day IBS-D course at U.S. retail can run past $2,800 while hepatic encephalopathy patients face that kind of bill every month. Two things change the picture in 2026: a generic rifaximin was finally approved in March, and cash-pay sourcing puts the same tablets in a completely different price range. Call your pharmacy and ask what the generic costs today, compare that against a discount card and a cash-pay quote, and don't let the first number you're quoted be the one you accept.

Frequently asked questions

How much does Xifaxan cost per month?

For hepatic encephalopathy at 550 mg twice daily, a month is about 60 tablets, which runs roughly $2,350 to $3,950 at U.S. retail cash prices. For IBS-D, you're buying a 14-day, 42-tablet course rather than a monthly supply, typically $2,000 to $2,800.

Is there a generic for Xifaxan yet?

Yes — the FDA approved a generic rifaximin 550 mg tablet in March 2026. Approval doesn't guarantee your pharmacy stocks it or that the price has dropped much yet, so ask directly rather than assuming.

Why is Xifaxan so expensive?

It's had no generic competition in the U.S. for years, it's protected by a stack of patents, and it's handled as a specialty medication, which adds markup along the distribution chain. Nothing in that chain has been pushing the price down.

Will insurance cover Xifaxan for SIBO?

Usually not. SIBO is an off-label use, and most plans deny it on that basis. People treating SIBO with rifaximin are typically paying cash, which makes comparing cash prices the only lever that matters.

What's the cheapest way to get Xifaxan?

Ask about generic rifaximin first, then compare pharmacy cash prices, a free discount card, and a cash-pay quote from a licensed source. The spread between the highest and lowest price on this drug is measured in thousands of dollars, not tens.

This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider for diagnosis and treatment. Pricing information is current as of the publication date but may change. Verify pricing directly before making purchasing decisions.