Thanks for your query.
As described your wife is having thyroid gland problem, probably hypothyroidism
for that she is taking Thyronom. She also faints and gets seizures occasionally, for that doctor has prescribed you Lamez OD which contains Lamotrigine which is prescribed for bipolar disorder
or psychotic disorders and seizures.
Hypothyroidism is a condition when thyroid gland dose not work properly due to many known reasons. In this disease body's basal metabolic rate
is disturbed and required energy can not be generated, so all other systems of body get affected. Patients have symptoms like fatigue,cold intolerance,constipation,dry coarse hair,weight gain, drowsiness, swelling etc beside that hypothyroid patient usually present with psychic disorders like depression, mood changes,decreased concentration, disorientation etc
Hypothyroid patient are vulnerable to get worse conditions like heart failure and myxedema coma which tends to be triggered by severe illness, surgery, stress.
Many patients have reported Hypothyroidism with seizures/epilepsy and fainting, though experts have not reached to conclude connection between these symptoms, however there is a disease which may have these symptoms simultaneously, that is Neurosarcoidosis
Neurosarcoidosis is rare chronic inflammatory disorder involving brain. Symptoms depends on area of involvement but usually it presents with Weak facial muscles
,Impaired vision,Impaired-hearing,Headache,Hallucination,Seizures,Memory loss,Agitation,Mood changes,Dysphagia,Psychiatric problems, Hypothroidism or any other endocrinological problem
I would advise you to visit a good neurologist
and get your wife thoroughly examined. Doctor may suggest X-ray, CT, or blood tests to reach proper diagnosis, then it can be controlled by Corticosteroid and immunosuppressive drugs.
Hope it helps.