I wouldn't risk it. There is NO information anywhere as to what "ampheta-cdp" actually is. At best it is some herbal supplement that does nothing. At worst, it is a potentially dangerous chemical that the FDA hasn't gotten around to banning yet. I bet the FDA will quickly crack down on this product as it makes all sorts of unsubstantiated medical claims without FDA approval.
The ADDTabz "The Adderall Alternative" is safe but should be prescribed by a medical practitioner. It is known to improve memory and learning, positive mood enhances brain functionality and reduces anxiety.