Nitazoxanide (Alinia) is an antiprotozoal (drug that fights against infections caused by protozoans) that is commonly prescribed to treat diarrhea caused by Cryptosporidium and Giardia.

How should it be used?

This medication is available in both tablet (ages 12 and older) and liquid (ages 1 and older) forms.

The tablet form of Alinia should NOT be used by children 11 years old or younger.

  • Take this medication with food. Shake the liquid form of the medicine well before each use.
  • Throw out the liquid medicine after 7 days.

The safety and efficacy of this drug in pediatric patients less than 1 year of age have not yet been studied.

Special Precautions/Instructions

Before you take this medicine tell the doctor about any of the following:

    • Medications (including over the counter), vitamins, herbal products, and supplements you are taking.
    • If you have a problem taking nitazoxanide or any ingredients in this medicine:

Alinia Tablets contain nitazoxanide and the following inactive ingredients: maize starch, pregelatinized corn starch, hydroxypropyl methylcellulose, sucrose, sodium starch glycollate, talc, magnesium stearate, soy lecithin, polyvinyl alcohol, xanthan gum, titanium dioxide, FD&C Blue No. 2 Aluminum Lake.

Alinia for Oral Suspension contains nitazoxanide and the following inactive ingredients: sodium benzoate, sucrose, xanthan gum, microcrystalline cellulose and carboxymethylcellulose sodium, anhydrous citric acid, sodium citrate dihydrate, acacia gum, sugar syrup, FD&C Red #40 and natural strawberry flavoring.

  • Have kidney, gallbladder, and/or liver problems.
  • Are diabetic (there is sugar (sucrose) in the liquid medicine).
  • Are pregnant, plan to become pregnant, or breastfeeding.

Side Effects

The most common side effects include: diarrhea, headache, nausea, and abdominal pain.

Contact your doctor immediately if you experience signs of an allergic reaction including:

  • Diarrhea
  • Feeling sick
  • Fever, shivering/chills, rash
  • Muscle and bone pain
  • Kidney problems (changes in the amount of urine or color of urine)
  • Tiredness, dizziness
  • Itching
  • Swelling
  • Trouble breathing

Storage Conditions

This medication should be stored at room temperature.


Call the national poison control center 1-800-222-1222 or 911 in the event of overdose. Symptoms of an overdose include vomiting, diarrhea, sore throat, fever, chills, and other signs of infection.

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