Health Guide
Drug Guide

Anesthetic, local (Rectal route)

Brand Names:

Dosage Forms:

Uses of This Medicine:

Rectal anesthetics are used to relieve the pain and itching of hemorrhoids (piles) and other problems in the rectal area. However, if you have hemorrhoids that bleed, especially after a bowel movement, check with your doctor before using this medicine. Bleeding may mean that you have a condition that needs other treatment.

These medicines are available without a prescription; however, your doctor may have special instructions on the proper use and dose for your medical problem.

Before Using This Medicine:


Tell your doctor if you have ever had any unusual or allergic reaction to medicines in this group or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.


Children may be especially sensitive to the effects of local anesthetics. This may increase the chance of side effects during treatment.

Older adults

Elderly people are especially sensitive to the effects of local anesthetics. This may increase the chance of side effects during treatment.


Rectal anesthetics have not been reported to cause birth defects or other problems in humans.


Rectal anesthetics have not been reported to cause problems in nursing babies.

Other medicines

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking any of these medicines, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using medicines in this class with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

Other interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other medical problems

The presence of other medical problems may affect the use of medicines in this class. Make sure you tell your doctor if you have any other medical problems, especially:

Proper Use of This Medicine:

For safe and effective use of this medicine:

This medicine should be used only for conditions being treated by your doctor or for problems listed on the package label. Do not use it for other problems without first checking with your doctor. This medicine should not be used if certain kinds of infections are present.

For applying a rectal anesthetic to the area around the rectum:

For inserting a rectal cream or ointment inside the rectum:

For inserting the rectal aerosol foam (e.g., Proctofoam/nonsteroid) into the rectum:


The dose medicines in this class will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of these medicines. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

Missed dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.


Keep out of the reach of children.

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Store the canister at room temperature, away from heat and direct light. Do not freeze. Do not keep this medicine inside a car where it could be exposed to extreme heat or cold. Do not poke holes in the canister or throw it into a fire, even if the canister is empty.

Do not keep outdated medicine or medicine no longer needed.

Precautions While Using This Medicine:

Check with your doctor:

False test results may occur if benzocaine or tetracaine is present in your body when a certain laboratory test is done. This test uses a medicine called bentiromide (e.g., Chymex) to show how well your pancreas is working. You should not use any products containing benzocaine or tetracaine for about 72 hours (3 days) before this test is done.

Side Effects of This Medicine:

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Stop taking this medicine and get emergency help immediately if any of the following effects occur:

Signs and symptoms of too much medicine being absorbed by the body
Blurred or double vision
convulsions (seizures)
dizziness or lightheadedness
feeling hot, cold, or numb
increased sweating
ringing or buzzing in ears
shivering or trembling
slow or irregular heartbeat
unusual anxiety, excitement, nervousness, or restlessness
unusual paleness

Check with your doctor as soon as possible if any of the following side effects occur:

Less common
Burning, stinging, swelling, or tenderness not present before treatment
skin rash, redness, itching, or hives at or near place of application

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

Last Updated: 10/12/2016

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