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Dequadin (dequalinium chloride, antiseptic lozenge)

Written by Stephanie Nera, RPh, PharmD · Pharmacology

Updated Sep 20, 2023

Dequadin is the brand name of the drug dequalinium chloride. Dequalinium is an antiseptic drug with antimicrobial and anticancer properties. This drug treats oral infections and vaginal infections. However, Dequadin is available as an oral lozenge only and cannot treat vaginal infections.



What is Dequadin used for?

This drug is used for mouth and throat infections, such as:

Dequalinium is also used in the treatment of bacterial vaginosis, however, Dequadin lozenges should not be used for this purpose.

How should I take Dequadin?

Only use Dequadin as prescribed by your doctor. Check the label on the medicine for exact dosing instructions. Additionally, be sure to take the correct dosage form for your condition. Oral medications should not be inserted vaginally and vice versa.

How do I store Dequadin?

This product is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store it in the bathroom or the freezer. 

There may be different brands of this drug that may have different storage needs. So, it is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush this product down the toilet or pour them into a drain unless instructed to do so. Additionally, it is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Dequadin?

Before using this drug, tell your doctor if you are/have:

  • Pregnant or breastfeeding.
  • Taking any other medicines. This includes any prescription, OTC, and herbal remedies.
  • An allergy to any of the ingredients of this product.
  • Any other illnesses, disorders, or medical conditions.

Is it safe during pregnancy or breastfeeding?

Unfortunately, there isn’t enough information about the safety of using this drug during pregnancy and breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking Dequadin.

Side effects

What side effects can occur from Dequadin?

Occasional hypersensitivity reactions and soreness of the tongue are possible. Excessive or high doses may cause gastrointestinal discomfort.

Not everyone experiences these side effects. In addition, some people may experience other side effects. So, if you have any concerns about a side effect, please consult your doctor or pharmacist.


What drugs may interact with Dequadin?

Medication may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. 

To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs, and herbal products) and share it with your doctor and pharmacist. 

For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Does food or alcohol interact with Dequadin?

This drug may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with Dequadin?

This drug may interact with underlying conditions. This interaction may worsen your health condition or alter the way the drug works. Therefore, it is important to always let your doctor and pharmacist know all the health conditions you currently have.


The information provided is not a substitute for any medical advice. Therefore, you should always consult with your doctor or pharmacist before using any medication.

What is the dose for an adult?

Adults and children over 10 years:

Consume one lozenge every 2 to 3 hours, up to a maximum of eight in one day. Allow the lozenge to dissolve in your mouth. Do not chew, crush, or swallow the lozenge.

What is the dose for a child?

The dosage has not been established in children under 10 years. Children under 6 years old should not receive any oral dose.

That is why it is always important to fully understand the safety of the drug before using it. Please consult with your doctor or pharmacist for more information.

How is Dequadin available?

Dequadin is available in the following dosage forms and strengths:

  • Dequadin 0.25mg lozenges

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to the nearest emergency room.

What should I do if I miss a dose?

If you miss a dose, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.


Hello Health Group does not provide medical advice, diagnosis or treatment.

Written by

Stephanie Nera, RPh, PharmD


Updated Sep 20, 2023

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