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For your information, lethargy, fatigue, sleepiness, Personality changes, Mood changes (depression, apathy) are some major symptoms seen after an episode of stroke.
Symptoms and disability following a stroke vary greatly depending on factors such as the part of the brain affected, how quickly treatment was given, and the extent of the damage to the brain.
Usually most patients who have had a significant stroke, recover and regain some function within weeks after a stroke. But some having extensive involvement may take months or years or might be irreversible.
You might consider getting her evaluated by a neurologist , who can help in her recovery.