A blood pressure of 90/60 mmHg is often normal for healthy women and typically does not require prescription medication if she is asymptomatic. Her practice of drinking salted fluids is a safe, effective temporary fix to increase blood volume. For long-term management, she should focus on staying well-hydrated, increasing dietary salt slightly, and avoiding sudden changes in posture. Specific medications or supplements are only necessary if an underlying cause, like anemia or Vitamin B12 deficiency, is diagnosed by a doctor. Please consult a physician for a proper evaluation before starting any active medical treatment.