**NETTLE: Benefits, Side Effects, Uses, Dosage, Warnings?** The benefits of nettle have been known since antiquity. This is one of the herbs most effective. Nettle is used in many forms (decoction, poultice, etc.) depending on the desired effect: diuretic , antirheumatic, antidémangeaison, etc. Borderleague.org ... , poultice, lotion or decoction fresh or even dried DRIED ORTIE, although fresh leaves retain all their properties. The nettle leaves can be eaten as vegetables.