She will need to check for possible triggers from her routine, avoiding them, preventive drugs would include atenolol, nifedipine, anti convulsants like topiramate. Painkillers like NSAIDS can be used to abort an attack, anti depressants like
nortriptyline,
fluoxetine and triptans like sumatriptan.
You need to check for any degenerative disc disease in the spine, particularly cervical spine causing headaches and numbness on left half of the body due to spinal canal stenosis.