Medimetriks Pharmaceuticals, Inc.
Pacnex Drug Class
Pacnex is part of the drug class:
What is the most important information I should know about Pacnex (benzoyl peroxide topical)?
Benzoyl peroxide can cause a rare but serious allergic reaction or severe skin irritation. Stop using this medicine and get emergency medical help if you have: hives, itching; difficult breathing, feeling light-headed; or swelling of your face, lips, tongue, or throat.
How should I use Pacnex (benzoyl peroxide topical)?
Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.
Benzoyl peroxide topical can cause a rare but serious allergic reaction or severe skin irritation. Before you start using this medicine, you may choose to apply a "test dose" to see if you have a reaction. Apply a very small amount of the medicine to 1 or 2 small acne areas every day for 3 days in a row. If there is no reaction, begin using the full prescribed amount on the 4th day.
Wash your hands before and after applying this medication.
Shake the lotion well just before each use.
Clean and pat dry the skin to be treated. Apply benzoyl peroxide in a thin layer and rub in gently.
Do not cover the treated skin area unless your doctor has told you to.
Benzoyl peroxide topical is usually applied one to three times daily. Follow your doctor's instructions.
Benzoyl peroxide may bleach hair or fabrics. Avoid allowing this medication to come into contact with your hair or clothing.
It may take several weeks before your symptoms improve. Keep using the medication as directed and tell your doctor if your symptoms do not improve.
Store at room temperature away from moisture and heat.
Pacnex (benzoyl peroxide topical) side effects
Benzoyl peroxide topical can cause a rare but serious allergic reaction or severe skin irritation. These reactions may occur just a few minutes after you apply the medicine, or within a day or longer afterward.
Stop using this medicine and get emergency medical help if you have signs of an allergic reaction: hives, itching; difficult breathing, feeling light-headed; swelling of your face, lips, tongue, or throat.
Stop using benzoyl peroxide and call your doctor at once if you have any of these side effects on the treated skin:
severe itching or burning;
severe stinging or redness;
Common side effects may include:
mild stinging or burning;
itching or tingly feeling;
skin dryness, peeling, or flaking; or
redness or other irritation.
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.
What other drugs will affect Pacnex (benzoyl peroxide topical)?
Applying benzoyl peroxide while you are also using tretinoin topical medicine may cause severe skin irritation. Brands that contain tretinoin include Avita, Renova, Retin-A, Tretin-X, and others.
It is not likely that other drugs you take orally or inject will have an effect on topically applied benzoyl peroxide. But many drugs can interact with each other. Tell each of your health care providers about all medicines you use, including prescription and over-the-counter medicines, vitamins, and herbal products.
For the Consumer
Applies to benzoyl peroxide topical: topical bar, topical cream, topical foam, topical gel/jelly, topical liquid, topical lotion, topical pad, topical soap, topical solution
Along with its needed effects, benzoyl peroxide topical (the active ingredient contained in Pacnex) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking benzoyl peroxide topical:Less common or rare
- Painful irritation of skin, including burning, blistering, crusting, itching, severe redness, or swelling
- skin rash
- Difficult breathing
- swelling of the eyes, face, lips, or tongue
- tightness in the throat
Get emergency help immediately if any of the following symptoms of overdose occur while taking benzoyl peroxide topical:Symptoms of overdose
- Burning, itching, scaling, redness, or swelling of skin (severe)
Some side effects of benzoyl peroxide topical may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:Less common
- Dryness or peeling of the skin (may occur after a few days)
- feeling of warmth, mild stinging, and redness of the skin