Advantage II stops fleas from biting in three to five minutes, starts killing fleas within an hour and kills all flea life stages. Within 12 hours of initial application, 98-100 percent of all existing fleas on pets are dead. For dogs and puppies 7 weeks and older.
 

• Quantity: 4-month supply
• Use: For dogs over 55 lbs.    
• Waterproof for 30 days
• Prevents fleas on treated dogs from infesting your home
• Treats, prevents & controls lice infestations