Modalert 200 Australia contains the active ingredient modafinil, a wake-promoting medication primarily used to treat sleep disorders such as narcolepsy, sleep apnea, and shift-work sleep disorder. Each tablet contains 200 mg of modafinil, which increases alertness and reduces excessive sleepiness by affecting certain neurotransmitters in the brain, such as dopamine and norepinephrine. In addition to modafinil, tablets may also contain inactive ingredients, such as lactose, magnesium stearate, and microcrystalline cellulose, which help bind the tablet together and ensure proper absorption in the body. These inactive ingredients do not contribute to the therapeutic effect but are used to maintain the stability and integrity of the medication.