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If your doctor prescribes Adderall tablets, your starting dose will likely be 5 mg. Typically, you’ll take this amount once or twice daily. After a week, your doctor may recommend increasing your dosage to 10 mg once or twice daily. This is the typically recommended dosage of Adderall tablets for adults with ADHD. Adderall tablet dose of the day should be taken when you first wake up. This is usually in the morning. If your doctor recommends it, you may take one or two additional doses throughout the day separated by 4 to 6 hours. However, avoid taking Adderall late in the afternoon or evening. This is because Adderall may disrupt your sleep.