Conditions Caused By Benzoyl Peroxide and Tretinoin

Side Effects and Conditions Caused By Isotretinoin

Minor discomforts such as dry mouth or nose, dry eyes, dry skin, or itching usually go away as the body adjusts to the drug and do not require medical attention unless they continue or are bothersome.

Other side effects should be brought to a physician’s attention. These include:
• burning, redness, or itching of the eyes
• nosebleeds
• signs of inflammation of the lips, such as peeling, burning, redness or pain

Bowel inflammation is not a common side effect, but it may occur. If any of the following signs of bowel inflammation occur, stop taking isotretinoin immediately and check with a physician:
• pain in the abdomen
• bleeding from the rectum
• severe diarrhea

The most common side effects of antiacne drugs applied to the skin are slight redness, dryness, peeling, and stinging, and a warm feeling to the skin. These problems usually go away as the body adjusts to the drug and do not require medical treatment.
Other side effects should be brought to a physician’s attention. Check with a physician as soon as possible if any of the following side effects occur:

• blistering, crusting, or swelling of the skin
• severe burning or redness of the skin>
• darkening or lightening of the skin (This effect will eventually go away after treatment with an antiacne drug ends.)
• skin rash

Other side effects are possible with any type of antiacne drug. Anyone who has unusual symptoms while using antiacne drugs should get in touch with his or her physician.
Interactions

Patients using antiacne drugs on their skin should tell their physicians if they are using any other prescription or nonprescription (over-the-counter) medicine that they apply to the skin in the same area as the antiacne drug.

Isotretinoin may interact with other medicines. When this happens, the effects of one or both drugs may change or the risk of side effects may be greater. Anyone who takes isotretinoin should let the physician know about all other medicines being used and should ask whether the possible interactions can interfere with drug therapy.

Among the drugs that may interact with isotretinoin are listed below:
• Etretinate (Tegison), used to treat severe psoriasis. Using this medicine with isotretinoin increases side effects.
• Tretinoin (Retin-A, Renova). Using this medicine with isotretinoin increases side effects.
• Vitamin A or any medicine containing vitamin A. Using any vitamin A preparations with isotretinoin increases side effects. Do not take vitamin supplements containing vitamin A while taking isotretinoin.
• Tetracyclines (used to treat infections). Using these medicines with isotretinoin increases the chance of swelling of the brain. Make sure the physician knows if tetracycline is being used to treat acne or another infection.

Parental Concerns

Acne comes at a difficult time, the adolescent years. While mild acne can be treated with over-the-counter medications, more severe acne needs medical attention. Experts advise against a wait-and-see attitude. Treatment options can help control acne and avoid scarring.

Isotretinoin can cause serious birth defects, including mental retardation and physical deformities. This medicine should not be used during pregnancy. Sexually active adolescent females who are able to bear children should not use isotretinoin unless they have very severe acne that has not cleared up with the use of other antiacne drugs. In addition, acne treatments that can dry the skin should be used with caution by people with skin of color.

Benzoyl Peroxide and Tretinoin

When applying antiacne drugs to the skin, people should be careful not to get the medicine in the eyes, mouth, or inside the nose. They should not put the medicine on skin that is wind burned, sunburned, or irritated, and not apply it to open wounds.

Because antiacne drugs such as benzoyl peroxide and tretinoin irritate the skin slightly, users should avoid doing anything that might cause further irritation. They should wash the face with mild soap and water only two or three times a day, unless the physician says to wash it more often. They should also avoid using abrasive soaps or cleansers and products that might dry the skin or make it peel, such as medicated cosmetics, cleansers that contain alcohol, or other acne products that contain resorcinol, sulfur, or salicylic acid.

If benzoyl peroxide or tretinoin make the skin too red or too dry or cause too much peeling, the user should check with a physician. Using the medicine less often or using a weaker strength may be necessary. Benzoyl peroxide can irritate the skin of people with skin of color and cause darkened spots called hyperpigmentation on the skin. Benzoyl peroxide may discolor hair or colored fabrics.

ORAL DRUGS. Oral antibiotics are taken daily for two to four months. The drugs used include tetracycline, erythromycin, minocycline (Minocin), doxycycline, clindamycin (Cleocin), and trimethoprim-sulfamethoxazole (Bactrim, Septra). Possible side effects include allergic reactions, stomach upset, vaginal yeast infections, dizziness, and tooth discoloration.

The goal of treating moderate acne is to decrease inflammation and prevent new comedones from forming. One effective treatment is topical tretinoin, used along with a topical or oral antibiotic. A combination of topical benzoyl peroxide and erythromycin is also very effective. Improvement is normally seen within four to six weeks, but treatment is maintained for at least two to four months.

Special Conditions

People who have certain medical conditions or who are taking certain other medicines may have problems if they use antiacne drugs. Before using these products, the physician should be informed about any of the following conditions.

ALLERGIES. Anyone who has had unusual reactions to etretinate, isotretinoin, tretinoin, vitamin A preparations, or benzoyl peroxide in the past should let the physician know before using an antiacne drug. The physician should also be told about any allergies to foods, dyes, preservatives, or other substances.

PREGNANCY. Teens who are pregnant or who may become pregnant should check with a physician before using tretinoin or benzoyl peroxide. Isotretinoin causes birth defects in humans and must not be used during pregnancy.

OTHER MEDICAL CONDITIONS. Before using antiacne drugs applied to the skin, people with any of these medical problems should make sure their physicians are aware of their conditions:
• Eczema. Antiacne drugs that are applied to the skin may make this condition worse.
• Sunburn or raw skin. Antiacne drugs that are applied to the skin may increase the pain and irritation of these conditions.

In people with certain medical conditions, isotretinoin may increase the amount of triglyceride (a fatty-substance) in the blood. This may lead to heart or blood vessel problems. Before using isotretinoin, adolescents with any of the following medical problems should make sure their physicians are aware of their conditions:

• alcoholism or heavy drinking, currently or in the past
• diabetes or family history of diabetes (Isotretinoin may change blood sugar levels.)
• family history of high triglyceride levels in the blood
• severe weight problems

Using antiacne drugs with certain other drugs may affect the way the drugs work or may increase the chance of side effects.

Anti-Acne Treatments

Anti-acne drugs are medicines that help clear up pimples, blackheads, whiteheads, and more severe forms of acne.

Benzoyl peroxide is found in many over-the-counter acne products that are applied to the skin, such as Benoxyl, Clear By Design, Neutrogena Acne, PanOxyl, and some formulations of Clean & Clear, Clearasil, and Oxy. Some benzoyl peroxide products are available without a physician’s prescription; others require a prescription. Tretinoin (Retin-A) is available only with a physician’s prescription and comes in liquid, cream, and gel forms, which are applied to the skin. Isotretinoin (Accutane), which is taken by mouth in capsule form, is available only with a physician’s prescription. Only physicians who have experience in diagnosing and treating severe acne, such as dermatologists, should prescribe isotretinoin.

Acne is a skin disorder that leads to an outbreak of lesions called pimples or “zits.” The most common form of the disease in adolescents is called acne vulgaris. Antiacne drugs are the medicines that help clear up the pimples, blackheads, whiteheads, and more severe forms of lesions that occur when a teen has acne.
Different types of antiacne drugs are used for different treatment purposes, depending on the severity of the condition. For example, lotions, soaps, gels, and creams containing substances called benzoyl peroxide or tretinoin may be used to clear up mild to moderately severe acne. Isotretinoin (Accutane) is an oral drug that is prescribed only for very severe, disfiguring acne.

Acne is caused by the overproduction of sebum during puberty when high levels of the male hormone androgen cause excess sebum to form. Sebum is an oily substance that forms in glands just under the surface of the skin called sebaceous glands. Sebum normally flows out hair follicles onto the skin to act as a natural skin moisturizer. The glands are connected to hair follicles that allow the sebum, or oil, to empty onto the skin through a pore.

Sometimes the sebum combines with dead, sticky skin cells and bacteria called Propionibacterium acnes (P. acnes) that normally live on the skin. The mixture of oil and cells allows the bacteria to grow in the follicles. When this happens, a hard plug called a comedo can form. A comedo is an enlarged hair follicle. It can appear on the skin as a blackhead, which is a comedo that reaches the skin’s surface and looks black, or as a whitehead, which is a comedo that is sealed by keratin, the fibrous protein produced by the skin cells and looks like a white bump.

In addition, pimples can form on the skin. Types of pimples include:
• papules, which are small, red bumps that may be tender to touch
• pustules, which are pus-filled lesions that are often red at the base
• nodules, which are large, painful lesions deep in the skin
• cysts, which are painful pus-filled lesions deep in the skin that can cause scarring

Pimples form when the follicle is invaded by the P. acnes bacteria. The damaged follicle weakens and bursts open, releasing sebum, bacteria, skin cells, and white blood cells into surrounding tissues. Scarring happens when new skin cells are created to replace the damaged cells. The most severe type of acne includes both nodules and cysts.

Acne cannot be cured, but antiacne drugs can help clear the skin and reduce the chance of scarring. The goal of treating moderate acne is to decrease inflammation and prevent new comedones from forming. Benzoyl peroxide and tretinoin work by mildly irritating the skin. This encourages skin cells to slough off, which helps open blocked pores. Benzoyl peroxide also kills bacteria, which helps prevent whiteheads and blackheads from turning into pimples. Isotretinoin shrinks the glands that produce sebum. It is used for severe acne lesions and must be carefully monitored because of its side effects. Antibiotics also may be prescribed to kill bacteria and reduce inflammation.

Symptoms and Diagnosis of Acne

SYMPTOMS

Acne is often not apparent to an observer. Inflamed pores, however, can cause pain or itching. The most troubling aspect of acne for many people is the scarring that can occur. And, while acne may not be very noticeable, individuals tend to be sensitive about their appearance. Teenagers especially may become concerned about the way other people react to them.

DIAGNOSIS

People with acne are often treated by family doctors. More serious cases are referred to a dermatologist (a specialist in skin disorders) or an endocrinologist (a specialist in hormonal disorders).

Because of its appearance, acne is not difficult to diagnose. A doctor takes a complete medical history, which includes questions about skin, diet, medication use, and other factors associated with risk for acne. He or she conducts a physical examination of the face, upper neck, chest, shoulders, back, and other affected areas. The doctor determines the number and type of blemishes, whether they are inflamed or not, whether they are deep or near the surface of the skin, and whether there is scarring or skin discoloration.

Laboratory tests are not done unless the patient appears to have a hormonal disorder. In that case, blood tests and other tests may be ordered. Most insurance plans cover the cost of diagnosing and treating acne.

ANTI-ACNE DRUGS
Brand Name (Generic Name)	Possible Common Side Effects Include:
Accutane (isotretinoin)	Dry skin, dry mouth, conjunctivitis
Benzamycin	Dry and itchy skin
Cleocin T (clindamycin phosphate)	Dry skin
Desquam-E (benzoyl peroxide)	Itching, red and peeling skin
Erythromycin topical (A/T/S, erycette, t-stat)	Burning, dry skin, hives, red and peeling skin
Minocin (minocycline hydrochloride)	Headache, hives, diarrhea, peeling skin, vomiting
Retin-A (tretinoin)	Darkening of the skin, blistering, crusted, or puffy skin

Topical and Oral Treatments for Acne

TREATMENT

Acne treatment consists of reducing sebum production, removing dead skin cells, and killing bacteria. Treatment methods differ depending on how serious the acne is.

Topical Drugs

Topical drugs are applied directly to the affected areas of the skin. They are available in the form of creams, gels, lotions, or pads. They are used primarily to treat mild forms of acne in which there is little or no inflammation.

One group of topical drugs used for acne includes antibiotics. These drugs kill the bacteria that contribute to the disease. Another group of drugs is called comedolytics (pronounced KO-mee-do-LIE-tiks). These drugs loosen hard plugs and open pores. Still another group of drugs works by increasing the rate at which new skin cells form. These drugs prevent the formation of new comedos.

Topical drugs are applied once or twice a day after washing with mild soap. Treatment may have to continue anywhere from a few weeks to a few months to a few years. Side effects such as mild redness, peeling, irritation, dryness, and an increased sensitivity to sunlight may occur.

Oral Drugs

Oral drugs are taken by mouth. Doctors sometimes prescribe oral antibiotics for moderate cases of acne. These antibiotics prevent the formation of new comedos and reduce inflammation. They are usually taken once a day

for two to four months. Side effects may include allergic reactions, stomach upset, vaginal yeast infections, dizziness, and tooth discoloration.

A drug that is used for severe cases of acne is isotretinoin (pronounced i-so-TRET-uh-no-un, trade name Accutane). This drug reduces the production of sebum and the stickiness of skin cells. It is used when cysts and nodules are present. The drug may be used alone or with other topical or oral antibiotics.

Isotretinoin treatment usually lasts for four or five months. It is effective in about 60 percent of all patients. If the acne reappears, another course of treatments may be necessary. Some side effects that may accompany the use of isotretinoin include nosebleeds, dry skin, a temporary worsening of the acne, vision disorders, and increased production of liver enzymes, blood fats, and cholesterol. It may also cause birth defects and cannot, therefore, be used by pregnant women.

Women who do not respond to any of these treatments may be given another type of oral drug, an anti-androgen. Anti-androgens reduce the production of androgen and therefore reduce the formation of comedos. Certain types of oral contraceptives are also effective as anti-androgens.

The most serious forms of acne require other types of drugs, including oral corticosteroids, or anti-inflammatory drugs. These drugs are often used for the treatment of a form of acne known as acne fulminans, which occurs mostly among adolescent males. They are also used with acne that produces numerous deep, inflamed nodules that heal with scarring.