Below are the main rubriks (i.e strongest indications or symptoms) of Kali Phosphoricum in traditional homeopathic usage, not approved by the FDA.
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Anxiety, Nervous dread, lethargy
Indisposition to meet people
Extreme lassitude and depression
Very nervous, starts easily, Irritable
Brain-fag; hysteria; Night terrors
Loss of memory
Slightest labor seems a heavy task
Great despondency about business
Shyness; disinclined to converse.≡ more ...