Why was Seconal discontinued

In the GABA-mimetic action of barbiturates the potency was in the order of secobarbital
In the GABA-mimetic action of barbiturates the potency was in the order of secobarbital greater than pentobarbital greater than hexobarbital greater than phenobarbital.

Each capsule contains 100 mg (0.38 mmol) of secobarbital sodium. It also contains dimethicone, FD&C Red No. 3, FD&C Yellow No. 10, gelatin, magnesium stearate, pregelatinized starch, and titanium dioxide.

Buy Seconal Online (secobarbital)
Secobarbital dosage