Major Maximum Strength Lice Killing Shampoo - 4 fl oz

Was: $10.99
Now: $9.99
Generic Equivalent To:
Rid Lice Killing Shampoo
Expiration Date:
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Major Maximum Strength Lice Killing Shampoo - 4 fl oz

  • Compare to the active ingredients in Rid Lice Killing Shampoo 
  • Lice treatment for human use
  • For the treatment of Head Lice, Crab Lice, and Body Lice
  • One nit comb included
  • 4 fl oz (118 mL)


  • Active: Piperonyl Butoxide 4% - Lice treatment 
  • Inactive: Benzyl Alcohol, C13-C14 Isoparaffin, Fragrance, Polyoxyethylene (1,1,3,3,- Tetramethyl Butyl) Phenyl Ether, Purified Water, Xanthan Gum


  • Treats: 
    • Head 
    • Pubic (crab)
    • Body Lice 


Drug Facts

  • Active Ingredients
    • Piperonyl butoxide 4%, Pyrethrum extract (equivalent to 0.33% pyrethrins)
    • Purpose: Lice treatment


  • Treats:
    • Head
    • Pubic (crab)
    • Body lice


    • For External Use Only
    • Do Not Use
      • Near eyes
      • Inside nose, mouth, or vagina
      • On lice in eyebrows or eyelashes (see a doctor if lice are present in these areas)
    • Ask a Doctor Before Use if You Are 
      • Allergic to ragweed
      • May cause breathing difficulty or an asthmatic attack
    • When Using This Product
      • Keep eyes tightly closed and protect eyes with a washcloth or towel
      • If product gets in eyes, flush with water right away
      • Scalp itching or redness may occur
    • Stop Use and Ask a Doctor If
      • Breathing difficulty occurs 
      • Eye irritation occurs
      • Skin or scalp irritation continues or infection occurs
    • Keep Out of Reach of Children
      • If swallowed, get medical help or contact a Poison Control Center right away


  • Important: Read warnings before use 
  • Adults and children 2 years and over:
  • Inspect-
    • Check each household member with a magnifying glass in bright light for lice/nits (eggs)
    • Look for tiny nits near scalp, beginning at back if neck and behind ears
    • Examine small sections of hair at a time
    • Unlike dandruff which moves when touched, nits stick to the hair
    • If either lice or nits are found, treat with this product 
  • Treat-
    • Shake well before using
    • Apply thoroughly to DRY HAIR or other affected area
      • For head lice, first apply behind ears and to back of neck
    • Allow product to remain for 10 minutes, but no longer 
    • Use war water to form a lather, shampoo, then thoroughly rinse 
    • For head lice, towel dry hair and comb out tangles
  • Remove Lice and Their Eggs (Nits)-
    • Use a fine-tooth or special lice/nit comb 
      • Remove any remaining nits by hand (using a throw-away glove)
    • Hair should remain slightly damp while removing nits
    • If hair dries during combing, dampen slightly with water 
    • For head lice, part hair into sections
      • Do one section at a time starting on top of head
      • Longer hair may take 1 to 2 hours
    • Lift a 1- to 2- inch wide strand of hair
      • Place comb as close to scalp as possible and comb with a firm, even motion away from scalp
    • Pin back each strand of hair after combing
    • Clean comb often
      • Wipe nits away with tissue and discard in a plastic bag
      • Seal bag and discard to prevent lice from coming back
    • After combing, thoroughly recheck for lice/nits
      • Repeat combing if necessary
      • Check daily for any lice/nits that you missed
    • A second treatment must be done in 7 to 10 days to kill any newly hatched lice
    • If infestation continues, see a doctor for other treatments
  • Children under 2 years:
    • Ask a doctor

Other Information

  • Store at 20-25 ºC (68-77ºF)
  • Avoid excessive heat
  • Keep carton for important product information
  • See Consumer Information Insert for additional information

Inactive Ingredients

  • Benzyl Alcohol, C13-C14 Isoparaffin, Fragrance, Polyoxyethylene (1,1,3,3,- Tetramethyl Butyl) Phenyl Ether, Purified Water, Xanthan Gum

1-2-3 Lice Elimination System

  • Completely eliminate lice from your family and home:
    • Step 1 TREAT
      • Apply Lice Killing Shampoo according to label directions
      • Repeat this step 7 to 10 days later to help prevent re-infestation
    • Step 2 REMOVE
      • After step 1, comb out the eggs and nits in the hair with a fine-toothed comb or with the nit comb (included)
      • You can use a conditioner on damp hair to make removal faster and easier 
    • Step 3 CONTROL
      • Use Home Lice Bedbug & Dust Mite Spray to kill lice and their eggs on mattresses, furniture, car interior, and other non-washable items (sold separately)
      • Wash bed linens, clothing and other items in hot water and dry in high heat
  • Important: Read detailed directions inside before using
  • Amount of shampoo needed will vary by hair length
      • Short (or ear length or shorter):
        • First Application: 1oz - 2oz
        • Second Application: 1oz - 2oz
        • Total: 2 oz - 4 oz
      • Medium (shoulder length):
        • First Application: 2 oz - 3 oz
        • Second Application: 2 oz - 3 oz
        • Total: 4 oz - 6 oz 
      • Long (past shoulder length):
        • First Application: 3 oz - 4 oz
        • Second Application: 3 oz - 4 oz
        • Total: 6 oz - 8 oz
    • Reminder: Before applying this product, DO NOT WET HAIR

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