You are right...Some Short Term Memory Loss is there but it is Reversible!!
It is one of the Safest Methods..even better than AntiPsychotics at certain instances..
But what needs to be seen is whether there is any response to the 1st Medication trial and has there been trial with a 2nd Drug(Because you mentioned it as an Acute case)
Next Steps
Consult Your Doctor or You can Take a second Opinion from Another Psychiatrist if you absolutely feel the necessity
Health Tips
It would not be wise to be biased by online searches..A professional Opinion is what you should go for..as every patient is different and every persons body reacts to medicines differently