Medically reviewed on December 15, 2017
What is Fostril?
Topical sulfur causes drying and peeling of the skin. This allows excess oil and dirt to be easily washed away.
Fostril is used to treat acne.
Fostril may also be used for purposes other than those listed in this medication guide.
Do not use sulfur on sunburned, windburned, dry, chapped, or irritated skin or on open wounds.
Avoid abrasive, harsh, or drying soaps and cleansers while using Fostril.
Who should not use Fostril?
Do not use Fostril on sunburned, windburned, dry, chapped, or irritated skin. It could make these conditions much worse. Also avoid using this medicine on wounds or on areas of eczema. Wait until these conditions have healed before using this medication.
Do not use Fostril during treatment with other topical acne products unless otherwise directed with your doctor. The combination could lead to severe skin irritation.
It is not known whether Fostril will harm an unborn baby. Do not use this medicine without first talking to your doctor if you are pregnant.
It is also not known whether sulfur passes into breast milk. Do not use sulfur topical without first talking to your doctor if you are breast-feeding a baby.
How should I use Fostril?
Use Fostril exactly as directed by your doctor, or follow the instructions that accompany the package. If you do not understand these directions, ask your pharmacist, nurse, or doctor to explain them to you.
Wash your hands before and after applying this medication.
Shake lotions well before using them.
Clean and dry the area to which you will apply Fostril. Apply the medication to the affected area.
When applying Fostril, avoid your eyes, the inside of your nose and mouth, your lips, and areas where the skin is broken to prevent excessive irritation. If you get medication in any of these areas, rinse it off with water.
Do not cover the affected area after applying Fostril, unless otherwise directed by your doctor. Doing so could cause too much medicine to be absorbed by your body and could be harmful.
Fostril is usually applied one to three times daily.
It may take several weeks or more to see the effects of this drug. Do not stop using Fostril if you do not see results immediately.
Apply Fostril less often if you experience excessive burning, dryness, or irritation.
Store Fostril at room temperature away from moisture and heat.
What happens if I miss a dose?
Apply the missed dose as soon as you remember. However, if it is almost time for your next dose, skip the dose you missed and apply only your next regularly scheduled dose.
What happens if I overdose?
An overdose of Fostril is unlikely to occur. If you do suspect an overdose, or if Fostril has been ingested, call a poison control center or emergency room for advice.
What should I avoid while using sulfur topical?
Do not use Fostril on sunburned, windburned, dry, chapped, or irritated skin or on open wounds.
Avoid using other topical products on the same area unless otherwise directed to do so by your doctor. They may interfere with the effects or absorption of sulfur topical.
Do not cover the area after applying Fostril, unless otherwise directed by your doctor. Doing so could cause too much medicine to be absorbed by your body and could be harmful.
Avoid using harsh, abrasive or irritating cleansers, perfumes or cosmetics on the area you are treating.
Fostril side effects
Serious side effects are not likely to occur. Stop using Fostril and seek emergency medical attention if you experience an allergic reaction (shortness of breath; closing of your throat; swelling of your lips, face, or tongue; or hives).
You may experience some burning, stinging, tingling, itching, redness, dryness, peeling, or irritation while you are using Fostril. If these side effects are excessive, apply this medicine less often.
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
What other drugs will affect Fostril?
Do not use other topical preparations unless directed to do so by your doctor. They may interfere with your treatment or increase irritation to your skin.
Avoid using harsh, abrasive or irritating cleansers, perfumes, or cosmetics on the area you are treating.
Drugs other than those listed here may also interact with Fostril. Talk to your doctor and pharmacist before taking any prescription or over the counter medicines.
- Your pharmacist has additional information about Fostril written for health professionals that you may read.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Copyright 1996-2018 Cerner Multum, Inc. Version: 3.05.