ATARXIA = A suspended calm in which you find surprising strength.
Clams are filter feeders and don't do well suspended.
Ataraxia (ἀταραξία, literally, "unperturbedness", generally translated as "imperturbability", "equanimity", or "tranquillity" ) is a Greek philosophical term for a lucid state of robust equanimity that was characterized by ongoing freedom from distress and worry.
In my opinion this is a lot BS, like most Stoic prescriptions.
I don't know if it is BS. I have had feelings of total calm and certainty and also total happiness and all that without drugs too.