Is dextroamphetamine even significantly serotonergenic? I thought it had very low activity at the 5-HT receptors, rather acting mostly with NE and DA receptors, at a 1:1 ratio (compared to 5:1 with l-amp). As far as I know, only methamphetamine is significantly serotonergenic, hence its higher level of neurotoxicity and more relaxed, euphoric, and sedating high compared to d-amp.