**Core Concept**
Aconite poisoning is a clinical entity caused by the ingestion or absorption of aconitine, a toxic alkaloid derived from the plant Aconitum. This condition is characterized by its rapid onset of symptoms, including cardiac, neurological, and gastrointestinal manifestations. Aconitine exerts its effects by blocking voltage-gated sodium channels in the heart and nervous system.

**Why the Correct Answer is Right**
Aconite poisoning primarily affects the cardiovascular system by causing myocardial depression, leading to decreased cardiac output and hypotension. The toxic alkaloid also affects the nervous system, causing neurological symptoms such as paresthesias, numbness, and weakness. Additionally, gastrointestinal symptoms like nausea, vomiting, and abdominal pain are common in aconite poisoning. Aconitine's mechanism of action involves binding to voltage-gated sodium channels, which disrupts normal cardiac and neuronal function.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because aconite poisoning is known to cause gastrointestinal symptoms such as nausea and vomiting, making this an incorrect statement.
**Option B:** Incorrect because aconite poisoning indeed affects the cardiovascular system, causing myocardial depression and hypotension, thus making this an incorrect statement.
**Option C:** Incorrect because aconite poisoning is characterized by its rapid onset of symptoms, including cardiac, neurological, and gastrointestinal manifestations, making this an incorrect statement.

**Clinical Pearl / High-Yield Fact**
Aconitine's mechanism of action is similar to that of local anesthetics, which block voltage-gated sodium channels. However, aconitine's effects are much more toxic and can lead to severe cardiac and neurological complications.

**Correct Answer:** D