Program Oral Suspension is a monthly preventative that controls fleas in cats by inhibiting/preventing the development of flea eggs, but which does not kill adult fleas. Program is 100% safe and effective in preventing and controlling flea populations and is usable with other flea preventatives. For a complete flea management program, most customers also purchase Capstar (sold separately) to kill adult fleas. Program Oral suspension contains 0.07 g of lufenuron per ml. PROGRAM oral suspension is available as: PROGRAM 133mg SUS, an oral suspension in an ampoule containing 19 ml, corresponding to 133 mg of lufenuron. PROGRAM 266mg SUS, an oral suspension in an ampoule containing 38 ml, corresponding to 266 mg of lufenuron. Indications: Program SUS is an oral suspension for cats for the prevention and control of flea infestations.