If you look at this composition for a sublingual pill for children, there are two  in it hyoscyamus niger and datura stramonium (they don' say datura for its bad reputation I guess), it is sold as a sleep aid and supposed to fight anxiety prior going to bed.

Chamomilla vulgaris 9 CH - 1,5g

Gelsemium 9 CH - 1,5g

Hyoscyamus niger 9 CH - 1,5g

Kalium bromatum 9 CH - 1,5g

Passiflora incarnata 3 DH - 1,5g

Stramonium 9 CH - 1,5g

pour 100g

Now this one for adult, to fight stress and as a sleep aid, here you find belladona:

Abrus precatorius 6 CH - 0,5mg

Aconitum napellus 6 CH - 0,5mg

Atropa belladonna 6 CH - 0,5mg

Calendula officinalis 6 CH - 0,5mg

Chelidonium majus 6 CH - 0,5mg

Viburnum opulus 6 CH - 0,5mg

Excipients : saccharose, lactose, stéarate de magnésium.

Another one always from the same famous brand of natural remedies, sleep aid and nervous  system balancing:

Stramonium 3 DH,

Hyoscyamus niger 3 DH,

Passiflora incarnata 3 DH,

Ballota foetida 3 DH,

Nux moschata 4 CH,

aa 1,2 mg

Excipients : saccharose, gomme arabique, talc, stéarate de magnésium.

qsp 1 comprimé de 0,20 g

All of their remedies concerning sleep aid, anxiety contain Solanaceae genus. I haven't found them using D.inoxia for some reason, maybe they prefer belladona or hyoscyamus niger for the purpose, I don' tknow the alcaloid composition of the last two

Anyway, seeing this it looks like at low dose it can help fight sleep anxiety.