A mother is concerned about her child who ate "blackberries" identified as Belladonna. Which symptom might you expect?

Belladonna, also known as deadly nightshade, contains atropine and other alkaloids that have anticholinergic properties. When ingested, these substances can lead to a specific set of symptoms known as anticholinergic toxicity. One of the hallmark symptoms observed in cases of Belladonna poisoning is flushed skin, which occurs due to peripheral vasodilation. This can cause the skin to appear red and warm, enhancing the flush appearance.

In contrast, symptoms such as miosis (constricted pupils) are typically associated with opioid ingestion or certain other agents, but not Belladonna. Anticholinergic substances like Belladonna usually cause mydriasis, which is the dilation of pupils. Diaphoresis, or excessive sweating, is also less common with anticholinergic toxicity; instead, skin may be dry due to the inhibition of sweat gland activity. Urinary incontinence can occur in various scenarios, but it is not a classic sign of Belladonna poisoning, which can often lead to urinary retention instead.

Therefore, the expected symptom consistent with Belladonna poisoning is indeed flushed skin, making that response the most relevant in this context.