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RisaQuad

Generic name: lactobacillus acidophilus

Brand names: Acidophilus, Acidophilus Extra Strength, Acidophilus Probiotic Blend, Acidophilus with Pectin, Bacid (LAC), Florajen Acidophilus, Risa-Bid, RisaQuad, Superdophilus, Flora-Q, Florajen, Lactinex

Last updated November 3, 2026 0 views
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What is RisaQuad?

RisaQuad is a type of bacteria that naturally exists in the body, mainly in the intestines and vagina. This medicine is used as a probiotic, or "friendly bacteria."

RisaQuad has been used in alternative medicine as a likely effective treatment for diarrhea in children with rotavirus.

RisaQuad has been used in alternative medicine as a possibly effective way to prevent diarrhea caused by antibiotics, travel, chemotherapy, or hospitalization in both children and adults. This medicine may also be possibly effective in treating irritable bowel syndrome, bacterial vaginal infections, colic in babies, lung infections in children, skin issues in children allergic to milk, and other conditions.

RisaQuad has also been used to treat lactose intolerance, Crohn's disease, bacterial overgrowth in the intestines, or vaginal yeast infections caused by antibiotics. However, research indicates that this medicine may not effectively treat these conditions.

Other uses that have not been proven by research include treating indigestion, urinary tract infections, intestinal issues in premature babies, high cholesterol, lyme disease, cold sores, acne, cancer, the common cold, and other conditions.

It is uncertain whether RisaQuad is effective for any medical condition. The medicinal use of this product has not been approved by the FDA. This medicine should not replace any medication prescribed by your doctor.

RisaQuad is often sold as an herbal supplement. Many herbal compounds do not have regulated manufacturing standards, and some supplements on the market have been found to be contaminated with toxic metals or other drugs. Herbal/health supplements should be bought from a trustworthy source to reduce the risk of contamination.

RisaQuad may also be used for other purposes not mentioned in this product guide.

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How should I take RisaQuad?

When thinking about using herbal supplements, talk to your doctor. You may also want to consult a practitioner who knows about herbal/health supplements.

If you decide to use RisaQuad, follow the instructions on the package or those given by your doctor, pharmacist, or other healthcare provider. Do not use more of this product than what is recommended on the label.

RisaQuad comes in capsule and tablet form, or as a vaginal suppository. Powder or liquid forms may also be available. Some dairy products, especially yogurt, also contain this medicine.

The chewable tablet must be chewed before you swallow it.

Do not use different forms of lactobacillus acidophilus at the same time without medical advice. Using different formulations together increases the risk of an overdose.

Call your doctor if the condition you are treating with RisaQuad does not improve, or if it gets worse while using this product.

Store RisaQuad in a sealed container as directed on the product label, away from moisture, heat, and light.

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Warnings

Follow all instructions on the product label and package. Inform each of your healthcare providers about all your medical conditions, allergies, and all medicines you are using.

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Before taking this medicine

Ask a doctor, pharmacist, or other healthcare provider if it is safe for you to use this product if you have:

  • short bowel syndrome; or
  • a weak immune system (caused by disease or by using certain medicine).

Ask a doctor before using this product if you are pregnant or breast-feeding.

Do not give any herbal/health supplement to a child without medical advice.

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RisaQuad side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Although not all side effects are known, RisaQuad is thought to be likely safe when taken for a short period of time.

Common side effects of RisaQuad may include:

  • bloating; or
  • gas.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

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What happens if I miss a dose?

Skip the missed dose if it is nearly time for your next scheduled dose. Do not take extra RisaQuad to compensate for the missed dose.

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What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Avoid taking RisaQuad within 2 hours after you take any type of antibiotic medicine.

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What other drugs will affect RisaQuad?

Do not take RisaQuad without talking to your doctor if you are using any medications that can weaken your immune system, such as:

  • medicine to prevent organ transplant rejection; or
  • steroid medicine (prednisone, dexamethasone, methylprednisolone, and others).

This list is not complete. Other drugs may interact with lactobacillus acidophilus, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this product guide.

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Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.