1 What is Natroba?

Brand: Natroba

Generic: Spinosad

Natroba is a topical solution that is used in treating head lice infestations. A kind of insecticide, this solution is only available with a doctor’s prescription.

2 What to Know Before Using

Your doctor will inform you of what you need to know before using Natroba. The risks and benefits the medicine offer must be weighed.

Before using this medicine, you and your doctor must consider the following:

  • Allergies: If you have any unusual reaction to any medicine or chemical, be sure to tell your doctor about it. Additionally, disclose other types of allergies - foods, preservatives, animals, or dyes, if there are any. Read the package ingredients carefully and make sure you are not allergic to any of its ingredients. 
  • Pediatric: Studies show that using spinosad in children does not limit its usefulness, given that it is used in children older than 6 months of age. Use in children younger than 6 months is not recommended.
  • Geriatric: Studies show that using this product in the elderly does not limit its usefulness and effectiveness.
  • Pregnancy: Animal studies show that using this solution during pregnancy have no evidence of harm to the fetus. Nevertheless, no adequate studies are done in pregnant women. Use with caution. 
  • Breastfeeding: Although there are no adequate studies in lactating mothers that determine potential risk in an infant when breastfeeding, the potential benefits should be weighed against the risks before taking this medication. 
  • Drug Interactions: Certain medicines have adverse effects when used together. Nevertheless, it is still possible to take other medicines when taking this drug. Make sure to inform your doctor about other drugs you are taking, so that alterations and precautions will be made if necessary.Using this with certain medicines needs utmost caution because the combination may result in certain side effects. Before taking this drug, talk to your doctor about possible interactions if you are taking other medications, both prescription and over-the-counter.

3 Proper Usage

To use Natroba properly, you must follow all instructions given by your doctor. Do not alter dosage or change treatment without your doctor’s advice. Only use this on hair and scalp. Avoid contact with eyes, mouth, nose and vagina. In the case of contact with these parts, rinse well with water. Do not swallow.

Shake well before using. Wash hands thoroughly before and after use. Apply directly onto dry hair. Leave the solution on hair and scalp for 10 minutes. Rinse with warm water and dry thoroughly with a clean towel. Using a fine-toothed comb, comb hair to remove nits and nit shells. Check hair 7 days after treatment. If live lice are present, repeat treatment. Do not use other hair products and cosmetics on treated areas.


Dosage generally depends on the patient. Follow your doctor’s orders in terms of dosage, regardless if it is different with the ones listed below.

In treating lice infestation in adults and children 6 months old and up, apply prescribed amount on hair and scalp. Use only once unless directed by your doctor. Do not use in children younger than 6 months of age.


Keep the medicine in an airtight container at normal room temperature. Keep it away from direct light, heat, and moisture. Do not let it freeze. Keep the medicine out of children’s reach. Throw away any outdated medicine or medicine that is not in use. Keep the medicine in its original package until needed.

4 Precautions to Take

In using Natroba, you must be careful and take some precautions as advised by your doctor. Natroba contains benzyl alcohol, a compound that may cause serious side effects on newborns and premature or low birth weight infants.

Head lice easily spread by direct contact with clothing, beddings, towels, hairbrushes, combs, and any other personal things. Check all household members for any sign of infestation so you can also treat them accordingly.

Prevent spread of head lice by dry-cleaning or washing your clothes, sheets, towels, beddings, and other stuff in hot, soapy water. Dry them in a hot dryer.

Do not use spinosad to treat other hair or scalp problems without your doctor’s advice.

5 Potential Side Effects

Make sure you meet with your doctor in using Natroba to avoid unwanted potential side effects.

Side effects may include itching and burning in the treated area, redness of the scalp, flaking on the scalp, redness of the eye, hair loss, thinning of hair, and dryness of the scalp.

These side effects may occur without needing medical attention, but if any of these become bothersome, check with your doctor.