As an insomniac, I've looked into this myself, and found the following to be natural sleep-inducing foods (in no particular order):
Cherries -- The tarter, the better. They have melatonin!! And they are great for desert.
Chamomile Tea -- apparently it contains the chemical glycine, which helps relax muscles and nerves.
Honey -- the natural sugar of honey ...
Salvia is a herbal treatment with a long tradition for this indication.
The HMPC has classified sage leaves as a traditional herbal medicinal product.
ESCOP: internally for increased secretion of sweat; externally for inflammation of the mucous membrane of the mouth and throat, gum inflammation.
Commission E: internally for dyspeptic ...
These are extracts and links:
Other proposed treatments include saw palmetto extract (Serenoa Repens); prostaglandin analogs like latanoprost and bimatoprost, which may be cost prohibitive
Serenoa repens(commonly called Saw Palmetto) extracts promote hair regeneration and repair of hair loss mouse models by ...
We cannot recommend medical treatments on this site. It's dangerous, especially in a situation where we're talking about symptomatic hypotension. I can offer you suggestions on where to go for answers:
First, I recommend a relationship with a primary care physician. A very low baseline BP should be assessed, and precautions discussed with the patient.