If you are considering purchasing Modafinil online for the treatment of ADHD, it is crucial to conduct thorough research and make sure you are buying from a reputable source. Additionally, it is vital to consult with your doctor before taking any medication, including Modafinil, to determine if it is the right treatment for your ADHD and the right direction for your health issues. There are two variants available: Modafinil 100mg and Modafinil 200mg.