A Parkinson Disease patient well known to you, presents with…

A Pаrkinsоn Diseаse pаtient well knоwn tо you, presents with recent onset light-headedness when going from sitting to standing. Seated BP: 130/80 and drops to 100/70 with standing. She has been logging her seated and standing BPs daily for the last 2 weeks and there continues to be more than 20 mmHg drop with transitions. Her medications include carbidopa/levodopa, lisinopril, and atorvastatin. Your next step would be: