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Lice Solution Top

In Depth

Generic Name: PYRETHRINS AND PIPERONYL BUTOXIDE SHAMPOO - TOPICAL
Pronounced: (pie-RETH-rins/pip-ER-oh-nill)

Lice Solution Top Side Effects

Skin irritation may occur. If this effect persists or worsens, tell your doctor or pharmacist promptly.

If your doctor has directed you to use this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including:

  • rash
  • itching/swelling (especially of the face/tongue/throat)
  • severe dizziness
  • trouble breathing


This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

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

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Lice Solution Top Precautions

Before using pyrethrins/piperonyl butoxide, tell your doctor or pharmacist if you are allergic to it; or to chrysanthemum or ragweed; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of:

  • skin infections


Constant or hard scratching of the skin/scalp may lead to a bacterial skin infection. Tell your doctor immediately if you develop worsening redness or pus.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.

It is not known whether this drug passes into breast milk. Consult your doctor before breast-feeding.

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