Excellent Modafinil usage recommendations 2021? Both Adderall and Ritalin cause extensive effects on the brain, which by extension leads to some undesired side effects on the user’s body. Amphetamines and Phenylethylamines can cause serious insomnia, alterations in social habits and personality, irritability, fever, dry mouth, hair, blurred vision, hair loss, dizziness, among other side effects. […]