What Is Retre-Gel? Uses, Dosage, and What You Need to Know in 2026

Retre-Gel is a topical anesthetic gel containing 20% benzocaine, a local anesthetic that belongs to the ester class of anesthetics. It is used to numb the surface of oral tissue, skin, or mucous membranes to reduce pain and discomfort during dental procedures, medical examinations, and for at-home management of minor oral pain.

What Is Benzocaine and Why Is It in Retre-Gel?

Benzocaine is one of the most widely used topical local anesthetics in the world. It is an ester-type anesthetic derived from para-aminobenzoic acid (PABA), first developed in the early 20th century as one of the earliest synthetic local anesthetics. It works by reversibly blocking sodium channels in nerve cell membranes, which prevents pain signals from being transmitted to the brain. Benzocaine is effective only on the surface where applied — it does not penetrate deeply into tissue and does not cause unconsciousness.

In Retre-Gel, benzocaine is formulated at 20% concentration — the maximum available OTC strength — in a flavored water-soluble gel base that adheres well to oral mucosal tissue.

What Is Retre-Gel Used For?

Retre-Gel is indicated for:

Topical oral anesthesia in dental settings — used on oral mucosa prior to local anesthetic injections, scaling, prophylaxis, and intraoral procedures

Relief of discomfort during dental impressions and intraoral radiographs

Temporary relief of toothache pain, gum pain, and minor oral irritation

Relief from canker sores (aphthous ulcers) and denture irritation

Temporary relief from minor sore throat pain (lozenges and sprays; not the gel)

Retre-Gel Dosage: How Much and How Often?

For adult patients and children 2 years and older:

Apply a small amount (using a cotton applicator or swab) to the affected oral mucosa area as needed

Do not use more than 3–4 times per day unless directed by a healthcare provider

In professional dental settings: apply a small amount with a cotton applicator to the mucosal site; leave in place for 30–60 seconds before proceeding with the procedure

Do not use in children under 2 years of age — FDA contraindication due to methemoglobinemia risk

How to Apply Retre-Gel Correctly

Use a clean cotton applicator, swab, or gloved fingertip — do not reintroduce a used applicator into the jar.

Apply a pea-sized amount to the target area.

Allow 30–60 seconds for numbing to take effect before the procedure.

Avoid eating or drinking for at least 1 hour after application if used for sore gums or oral pain.

Tightly recap the jar after each use. Store at 59–86°F (15–30°C) away from heat. Do not freeze.

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Who Makes Retre-Gel?

Retre-Gel is a branded professional dental topical anesthetic gel in the benzocaine product family. It is manufactured and distributed through dental supply channels, rather than being a consumer retail brand. The same 20% benzocaine active ingredient is found in dozens of other brands, including Hurricaine, Orajel, Anbesol, Benzo-Jel, and Topex.

Key Safety Warning: Methemoglobinemia Risk

The FDA has issued a safety communication about the risk of methemoglobinemia — a serious blood condition — from benzocaine products. This can occur even with small amounts and even if you've used the product before. Do not use Retre-Gel in infants or children under 2. Seek immediate medical attention if you notice blue or gray lips, skin, or nails, shortness of breath, confusion, or rapid heartbeat after use.

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Is Retre-Gel a Controlled Substance?

No. Retre-Gel is not a controlled substance and is not classified under any DEA schedule. It does not require special prescribing authorization, and there are no restrictions on the number of refills.

Want to understand how benzocaine works at the cellular level? See our guide on how Retre-Gel works. For more on side effects, see Retre-Gel side effects: what to expect.