I've checked products available in Poland and found none containing solanum nigrum, although numerous products contain solanum dulcamara in form of tablets, drops, ointment, suppository etc.

All of them are manufactured by Biologhische Heilmittel Heel GmbH - http://www.heel.de

I hope this is of some help for you.

The Materia Medica descibes the using of solanum nigrum. A dosage of the herb is quoted with 15-30 g. The overdosage is given from 40-60 g. It depend an the amount of solanin. Toxic effects in man may occure from 60 to 200 mg of solanin. The LD50 for rat is given with 590 mg/kg. You can get the date in the FDA poisonus plant database at http://google2.fda.gov

Dear Michał Sowa, would you mind mentioning the name of products which contain Solanum dulcamara? I entered that website but unfortunately I was not familiar with the language of that.

Sure, some of the products from heel.de:

http://www.heel.de/Heel-de-F-d-M-Zeel-Creme.html

http://www.heel.de/Heel-de-F-d-M-Rhododendroneel-Tropfen.html

http://www.heel.de/Heel-de-Komp-LK-HM-Lithiumbenzoat.html

http://www.heel.de/Heel-de-Komp-LK-HM-aus-Siambenzoe-sublimierte-Benzoesaeure.html

Try using google translate, and by clicking "Produktinformation" you will get the a composition of their products. I'm not an expert in German, so I guess it would be best to ask them directly for information in English - [email protected]