クロゴケグモ抗毒素
クロゴケグモ抗毒素は、クロゴケグモ（*Latrodectus mactans*）の咬傷による毒素を中和するための救命用生物学的製剤です。 **臨床上のポイント:** * **動物種の感受性:** 猫、ラクダ、馬はクロゴケグモの毒素に対して非常に敏感であるとされています。 * **毒性の特徴:** 主な毒性症状は、毒液に含まれる強力な神経毒（特にα-ラトロトキシン）によるもので、神経伝達物質の大量放出を引き起こし、重度の筋肉のけいれん、硬直、自律神経の不安定性をもたらします。 * **入手の難しさ:** 希少種の抗毒素は獣医師にとって入手が困難な場合があります。最新の入手方法や治療の選択肢については、中毒事故管理センターに連絡することを強くお勧めします。
作用機序: Antivenins act by directly neutralizing the complex protein venoms in the patient's systemic circulation. * **Mechanism:** The product provides **passive immunization** via concentrated serum globulins obtained from horses previously immunized with black widow spider venom. * **Pharmacodynamic Pathway:** The antibodies bind to **alpha-latrotoxin** → prevents the toxin from forming pores in presynaptic neuronal membranes → halts the massive, uncoordinated influx of calcium and subsequent depletion of neurotransmitter vesicles (like acetylcholine and norepinephrine). * In humans, clinical symptoms typically begin to subside within 1-2 hours after administration.
動物種別の用量
- Black Widow Spider Envenomation · After reconstituting the antivenin, add to 100 mL of normal saline and administer via slow IV over 30 minutes. Pretreatment with 2-4 mg/kg of diphenhydramine SC may help calm the patient and may possibly protect against allergic reactions from the antivenin. · IV · Single dose · 30 minutes · Monitor inner pinna during infusion for signs of anaphylaxis (hyperemia). If hyperemia occurs, discontinue infusion and give a second dose of diphenhydramine. Benzodiazepines may alleviate muscle cramping.
- Black Widow Spider Envenomation · Dissolve contents of one vial and add to 100-200 mL of warm 0.9% NaCl and infuse over 2-6 hours. Administer diphenhydramine at 0.5-1 mg/kg prior to infusion. · IV · Single dose · 2-6 hours
- Black Widow Spider Envenomation · After reconstituting the antivenin, add to 100 mL of normal saline and administer via slow IV over 30 minutes. Pretreatment with 2-4 mg/kg of diphenhydramine SC may help calm the patient and may possibly protect against allergic reactions from the antivenin. · IV · Single dose · 30 minutes · Monitor inner pinna during infusion for signs of anaphylaxis (hyperemia). If hyperemia occurs, discontinue infusion and give a second dose of diphenhydramine. Benzodiazepines may alleviate muscle cramping.
- Black Widow Spider Envenomation · Dissolve contents of one vial and add to 100-200 mL of warm 0.9% NaCl and infuse over 2-6 hours. Administer diphenhydramine at 0.5-1 mg/kg prior to infusion. · IV · Single dose · 2-6 hours
用量は獣医療従事者向けの臨床リファレンスです。必ず最新の添付文書と個々の患者で確認してください。
投与経路
禁忌
- Known severe hypersensitivity to equine serum (relative contraindication in life-threatening envenomation)
有害事象
- Anaphylaxis (incidence <2%)
- Anaphylactoid reactions (nausea, pruritus, hyperemia of the inner pinna)
- Serum sickness (delayed hypersensitivity)
薬物相互作用
- Beta-blockers · May mask the early signs associated with anaphylaxis
モニタリング
- Signs associated with an allergic response to the antivenin (anaphylaxis, anaphylactoid-reactions, serum sickness)
- Respiratory/cardiac rate
- Blood pressure
- Serum chemistry (blood glucose mandatory)
- CBC
- Urine output; urinalysis
過量投与
Specific overdosage information is not provided. However, excessive administration of serum products increases the risk of volume overload and severe hypersensitivity reactions, including anaphylaxis and serum sickness.
VetSheet の薬剤リファレンスは、獣医療従事者向けの臨床意思決定支援を目的としており、専門的判断やメーカーの最新添付文書に代わるものではありません。