Page "Transcranial magnetic stimulation" Paragraph 6

Besides seizures, other risks include fainting, minor pains such as headache or local discomfort, minor cognitive changes and psychiatric symptoms ( particularly a low risk of mania in depressed patients ).

Though other side effects are thought to be possibly associated with TMS ( alterations to the endocrine system, altered neurotransmitter and immune system activity ) they are considered investigational and lacking substantive proof.