How to Find a Doctor Who Can Prescribe Nitazoxanide Near You [2026 Guide]

Nitazoxanide (Alinia) is a prescription-only medication. You cannot buy it over the counter. To get a prescription, you'll need a confirmed or suspected diagnosis of an infection that nitazoxanide treats — most commonly giardiasis (Giardia lamblia) or cryptosporidiosis (Cryptosporidium parvum). Here's a practical guide to getting the prescription you need.

Is Nitazoxanide a Controlled Substance?

No. Nitazoxanide is not a controlled substance and is not scheduled by the DEA. Any licensed prescriber — including physicians, nurse practitioners, and physician assistants — can prescribe it in all 50 states without restrictions beyond a valid patient-provider relationship and clinical indication.

Which Doctors Prescribe Nitazoxanide?

Because it treats parasitic infections, nitazoxanide can be prescribed by a wide range of providers. The type of doctor who's right for you depends on your specific situation:

• Primary care physician (PCP): The most common first stop. If you have symptoms of giardiasis (diarrhea, bloating, gas, nausea) after travel or possible water exposure, your PCP can order a stool test, confirm the diagnosis, and prescribe nitazoxanide.
• Infectious disease specialist: For complex or prolonged cases, immunocompromised patients, or when standard treatment has failed, an ID specialist has the deepest expertise in parasitic infections and antiparasitic therapies.
• Gastroenterologist: If your GI symptoms are persistent or complex, a gastroenterologist can evaluate and treat intestinal parasitic infections alongside other GI conditions.
• Travel medicine physician: If you've recently returned from international travel and developed diarrheal symptoms, a travel medicine specialist is highly experienced with Giardia and Cryptosporidium and other waterborne parasites.
• Pediatrician: For children ages 1 and older, the pediatrician can diagnose and prescribe the age-appropriate nitazoxanide oral suspension.
• Urgent care provider: For travelers with classic symptoms and known exposure, an urgent care physician may prescribe empirically (without waiting for test results) if your presentation is consistent.
• Nurse practitioners (NPs) and physician assistants (PAs): Can prescribe nitazoxanide independently in most states without any special authority requirements.

What Symptoms Warrant Seeking a Prescription?

Seek medical evaluation if you have diarrhea lasting more than a few days, especially with these features that suggest a parasitic infection:

• Diarrhea lasting more than 2 weeks
• Greasy, foul-smelling stools (classic for Giardia)
• Significant bloating and gas with cramping
• Recent travel to an area with questionable water quality
• Exposure to untreated water (hiking, camping, swimming in lakes or streams)
• Diarrhea in a childcare setting (Giardia spreads easily among young children)

Can You Get Nitazoxanide Through Telehealth?

Yes — in many cases. Because nitazoxanide is not a controlled substance, telehealth providers can prescribe it if they have a valid clinical basis (your symptoms, travel history, and ideally lab confirmation). Telehealth platforms like Teladoc, MDLive, and others can assess your symptoms and send a prescription to your local pharmacy electronically.

For complex cases or immunocompromised patients, in-person evaluation with stool testing is strongly preferred. Telehealth is most appropriate for straightforward presentations in otherwise healthy adults with classic symptoms after known water or travel exposure.

How Is Giardiasis Diagnosed?

Your doctor will typically order a stool test to confirm a diagnosis of Giardia or Cryptosporidium. The most common tests include: (1) stool antigen test — a rapid immunoassay that detects Giardia or Cryptosporidium antigens in a single stool sample; (2) PCR stool testing — highly sensitive; (3) ova and parasite (O&P) exam — microscopic examination of stool, sometimes requiring multiple samples.

Once you have your prescription, medfinder can help you find a pharmacy that has nitazoxanide in stock — so you can start treatment quickly.

Tips for Your Appointment

• Tell your provider about all recent travel, camping, or water exposure
• Note how long symptoms have been present and what they are
• List all current medications (especially warfarin) for interaction screening
• Ask your provider to write the prescription for "nitazoxanide" (generic) — see our savings guide for 2026 to understand why this can save you hundreds of dollars