Seek immediate medical care (call 911) if a sudden foot tingling sensation is accompanied by numbness or weakness on one side of your body; a change in level of consciousness or alertness, such as passing out or unresponsiveness; or the worst headache of your life, as these can be signs of stroke.
Most people have to take three doses each day to cover all of the time in which they experience ADHD impairments. Adderall XR (extended release) capsules last from seven to 12 hours, depending on a personâs individual chemistry. Most patients require two doses a day to cover their waking day.
1 Adderall Instant Release Tablets - On average these last approximately 4-6 hours and can be taken 1-3 times a day. (They are most commonly taken 2 times a day)  Adderall Extended Release Capsules - On average these last 10-12 hours and are only supposed to be taken once a day.