as a designer drug along with related analogues such as 2-fluoroamphetamine and 4-fluoromethamphetamine , among others. [1] [2] Effects The subjective effects of 4-FA include euphoria , increased energy, mood elevation, excessive talking, bruxism (jaw clenching), insomnia and suppressed appetite. 4-Fluoroamphetamine is a potent stimulant and serotonin releaser as with other