Mu beta, as your BP is still withing the normal range i suspect your doctor ment that you did not need any medication.
Response to a diagnosis of postural hypotension would normally be:
1) Treat any underlying cause, if any.
2) Recommend controlled changes in posture - sit before standing, stand before walking. walk before running.
3) avoid large meals, high temperatures, excess alcohol.
4) Increase fluid intake
5) Increase salt intake
6) Medication options include steroids such as fludrocortisone or beta blockers, depending on the cause.