Buy Adderall 12.5mg online that (amphetamine salt combo) comes in an immediate-release (IR) tablet and an extended-release (XR) capsule. The best Adderall dosage for you depends on several factors. Here, we’ll review the typical recommended Adderall dosages. But be sure to follow your prescriber’s instructions, since they’ll be specific to your needs. Your Adderall dosage will depend on your age and the health condition you’re treating. The typical Adderall IR dosage starts at 2.5 mg to 5 mg once or twice a day. You can take it up to 3 times daily if needed, with doses about 4 to 6 hours apart.