Rx for Spirotetramat poisoning
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The medical library does not contain a specific entry for spirotetramat. I'll answer from clinical toxicology knowledge, supplemented by the general pesticide poisoning management principles found in the textbooks.
Spirotetramat Poisoning — Management
Background
Spirotetramat (Movento®) is a systemic insecticide/acaricide in the tetramic acid / ketoenol class. It inhibits acetyl-CoA carboxylase, disrupting lipid (fat) biosynthesis in insects. It is not an organophosphate, carbamate, or pyrethroid — it has a distinct mechanism with no cholinergic toxidrome and no specific antidote.
Clinical Features
| Route | Manifestations |
|---|---|
| Ingestion | Nausea, vomiting, abdominal pain, diarrhea |
| Skin/eye contact | Local irritation, erythema |
| Inhalation | Mild respiratory irritation |
| Severe exposure | Dizziness, headache, malaise; serious systemic toxicity is uncommon at typical exposure levels |
No cholinergic (SLUDGE), nicotinic, or CNS seizure syndrome is expected (unlike organophosphates).
Treatment
No specific antidote exists. Management is supportive.
1. Decontamination
- Skin/eye: Remove contaminated clothing; copious water irrigation ≥15 minutes for skin or eyes.
- Ingestion: If within 1–2 hours of a significant ingestion and airway is protected — activated charcoal 1 g/kg (adult: 50–100 g) orally. Gastric lavage only if large ingestion and patient presents early.
- Do not induce emesis.
2. Supportive Care
- Establish IV access; monitor vitals, O₂ saturation, ECG.
- Antiemetics (ondansetron, metoclopramide) for nausea/vomiting.
- IV fluids for hydration if vomiting is significant.
- Symptomatic treatment for any GI complaints.
3. Monitoring
- Observe for ≥4–6 hours post-ingestion for symptom development.
- Liver function tests and renal function if large ingestion.
- Most patients with occupational/household-level exposure can be discharged after observation if asymptomatic.
4. Antidote
- None. Atropine, pralidoxime, and pyridoxine are not indicated (no cholinergic mechanism).
Disposition
- Asymptomatic after 4–6 hours → discharge with poison control follow-up.
- Symptomatic (persistent vomiting, neurological signs, hepatic injury) → admit for continued supportive care.
- Poison Control Center should be contacted in all significant exposures (e.g., US: 1-800-222-1222).
Key Point
Spirotetramat is low human toxicity at typical exposures — its mechanism (lipid biosynthesis inhibition) is highly selective for arthropods. Human poisoning is managed symptomatically, with decontamination as the primary intervention.
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