Actually, it is fortunate.
They do not call this plant 'deadly nightshade' for no reason. It is extremely poisonous.
Homeopathic anything is utter bollocks. It is a near certainty, that there is not one single atom or molecule of the original substance in the water. The homeopathic fuckmongers who vomit up that tide of rancid smegma claim water has a 'memory' of what has been in it. It's no different to if I were to wave my dick three times in the air, chant 'get high, get high, get high', You've as much chance of any effect, medical or recreational from homeopathy as you do from that.
Homeopathy could of course, exert placebo or nocebo effects, but otherwise, it is superstition and wankers selling water or little round bits of lactose at extortionate prices.
IMO homeopaths need shooting. In the kneecaps. Then offered homeopathic opium.
My contempt for those charlatans aside...DON'T!
I've used belladonna before, as a herbal treatment for nausea, not as a delirient, but doses of dried leaf, are in the very low tens of milligrams, I knew well what I was doing, as I'm familiar very well with plants and fungi, and their medicinal and toxic properties. You screw up with it, and you'll kill yourself. You get it 'right' and you'll go temporarily psychotic, unable to tell reality from batshit consensus insanity. The clowns will be running the circus, and they'll be the type of clowns you see in late night movies that rip children's eyes out and eat people. IF you are lucky. As well as feeling physically, as if you were roasting, your mouth will be drier than an orthodox jewish nun's minge after a phosphorus pentoxide tampon. Your eyes will be dry and irritated, also, you'll be very unpleasantly hypersensitive to light, due to the mydriatic effects of the antimuscarinic alkaloids present in Atropa belladonna, as well as plenty of it's family relatives, chock full of tropane alkaloids. Causes one's eyes to have the pupils dilate to a huge size, which, actually is the origin of the name 'belladonna', italian, meaning 'beautiful lady'
Italian women of a fashionable persuasion, would drop the juice from the berries into their eyes, back in days of yore, to cause this effect, and keep it local, to the eye, believing the huge pupils were sexy.
Not a good idea, mind you, but history is replete with terrible ideas where feminine beauty is concerned. Arsenic-eating, lead-based face paint, deadly nightshade eyedrops...
If you are determined to ignore all sound advice and use nightshade delirients, don't use this one. Atropine is one of the rougher, harsher and less pleasant of antimuscarinic drugs according to the accounts I've read of various delirient anticholinergics.
Also be aware, nightshades vary a LOT, the same species, will vary from season to season, plant to plant, location to location, part of the plants vary, for example, in the case of deadly nightshade, the root, in particular must be avoided, because it contains a compound called apoatropine, as well as the other antimuscarinic alkaloids in Atropa belladonna, and apoatropine is very toxic indeed.
There is a very, very, very fine line with tropane anticholinergics, between living hell, and living hell then dying nastily.
The kind of fine line that makes carbon nanotubes look morbidly obese.