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These drugs affect L-type calcium channels

[1] [6] Severe deficiencies may include symptoms of reduced heart function, suppression of bone marrow, as well as more various severe neurological symptoms possibly including sensory loss, abnormal balance and reflexes, memory and consciousness impairment, smell and taste problems, depression, irritability, confusion, and psychosis

This is why the no-DAC form is pharmacologically a different proposition from the DAC form, despite sharing a name

I left feeling refreshed, energized, and noticeably better than when I arrived

Combined measurement of biomarkers of effect and biomarkers of exposure would provide a more precise diagnosis