์์ผ๋ผ์ง
์์ผ๋ผ์ง์ ๊ฐ๋ ฅํ **์ํ-2 ์๋๋ ๋ ๋ฆฐ ์์ฉ์ฒด ์์ฉ์ **๋ก, ์์ํ์์ ์ง์ ์ , ์งํต์ ๋ฐ ๊ทผ์ก ์ด์์ ๋ก ๋๋ฆฌ ์ฌ์ฉ๋ฉ๋๋ค. ๋ํ ๊ณ ์์ด์์ ์ ๋ขฐํ ์ ์๋ **์ตํ ์ **(๊ตฌํ ์ ๋ฐ์ )๋ก๋ ์์ฃผ ์ฌ์ฉ๋ฉ๋๋ค. > **์์ ์์ :** ์์ผ๋ผ์ง์ ๋ํ ๋ฏผ๊ฐ๋๋ ์ข ์ ๋ฐ๋ผ ํฐ ์ฐจ์ด๊ฐ ์์ต๋๋ค. **๋ฐ์ถ๋๋ฌผ์ ๋งค์ฐ ๋ฏผ๊ฐํ์ฌ** ๋ง์์ ์ฌ์ฉ๋๋ ์ฉ๋์ ์ฝ 1/10๋ง์ผ๋ก๋ ๋์ผํ ํจ๊ณผ๋ฅผ ์ป์ ์ ์์ต๋๋ค. ๋ฐ๋ฉด ๋ผ์ง๋ ์ ํญ์ฑ์ด ๋์ ๋ฐ์ถ๋๋ฌผ ์ฉ๋์ 20~30๋ฐฐ๊ฐ ํ์ํฉ๋๋ค. ๋ด์ฅ ์งํต ํจ๊ณผ(ํนํ ๋ง์์)๊ฐ ๋ฐ์ด๋์ง๋ง, ์๋งฅ, ๋ถ์ ๋งฅ, ์ฌ๋ฐ์ถ๋ ๊ฐ์ ๋ฑ ์ฌํ๊ด๊ณ ์ต์ ํจ๊ณผ๊ฐ ํฌ๊ธฐ ๋๋ฌธ์ ์๋๋ฌผ์์๋ ์ฃผ๋ก ์ ๊ณ ๊ฑด๊ฐํ ํ์์๊ฒ๋ง ์ ํ์ ์ผ๋ก ์ฌ์ฉ๋ฉ๋๋ค. ์์ฉ ๋๋ฌผ์ ๋ํ ์ฌ์ฉ์ FDA ์น์ธ์ ๋ฐ์ง ์์์ผ๋, ์๊ฒฉํ ํด์ฝ ๊ธฐ๊ฐ์ ์กฐ๊ฑด์ผ๋ก ํ๊ฐ ์ธ ์ฌ์ฉ(extra-label use)์ด ์ด๋ฃจ์ด์ง๊ธฐ๋ ํฉ๋๋ค.
์์ฉ ๊ธฐ์ : Xylazine stimulates presynaptic and postsynaptic **alpha-2 adrenergic receptors** in the central and peripheral nervous systems. * **Sedation & Analgesia:** Activation of central alpha-2 receptors โ decreased release of **norepinephrine** and dopamine โ profound CNS depression and analgesia. * **Muscle Relaxation:** Centrally mediated inhibition of intraneuronal transmission of impulses in the CNS. * **Cardiovascular Effects (Biphasic):** Initial stimulation of peripheral alpha-1 and alpha-2 receptors โ transient vasoconstriction and **hypertension** โ subsequent central sympatholytic effect โ **hypotension**, **bradycardia**, and potentially second-degree AV block. Cardiac output can decrease by up to 30%. * **Emesis:** Stimulates the chemoreceptor trigger zone (CRTZ), particularly in cats. * **Endocrine/Renal:** Decreases insulin release โ transient **hyperglycemia**. Decreases ADH production โ **polyuria** (especially in ruminants).
๋๋ฌผ ์ข ๋ณ ์ฉ๋
- Label dosage (Note: Many believe this is too high) ยท 1.1 mg/kg IV, 1.1-2.2 mg/kg IM or SC ยท IV, IM, SC ยท Once
- Preanesthetic ยท 0.2-1 mg/kg IV, IM or SC ยท IV, IM, SC ยท Once
- Emetic ยท 0.44 mg/kg IM ยท IM ยท Once
- Analgesic ยท 0.1-1 mg/kg IV, IM or SC ยท IV, IM, SC ยท Once
- Post-operative anxiety ยท 0.1-0.5 mg/kg IV, IM or SC ยท IV, IM, SC ยท Once
- Emesis ยท 0.6 mg/kg (IM) or 1 mg/kg (SC) ยท IM/SC ยท once ยท Effective in >75% of cats. Emesis generally occurs rapidly within 10 min. Further doses depress the vomiting centre and may not result in further vomiting.
- Growth hormone suppression test ยท 100 ฮผg/kg ยท IV ยท once ยท Consult specialist texts for protocol.
- Sedative/analgesic ยท 0.5-2 mg/kg IM or SC ยท IM, SC ยท Once ยท Usually combined with atropine (0.05 mg/kg) or glycopyrrolate (0.01 mg/kg IM).
- Sedative/analgesic combination ยท Xylazine (2 mg/kg) plus butorphanol (0.2 mg/kg) IM ยท IM ยท Once
- Anesthesia combination ยท Telazol (1.5 mg/kg) plus xylazine (1.5 mg/kg) IM ยท IM ยท Once ยท May reverse xylazine with yohimbine (0.05 mg/kg IM). Can also add butorphanol 0.2 mg/kg.
ํฌ์ฌ ๊ฒฝ๋ก
๊ธ๊ธฐ
- Animals receiving epinephrine
- Active ventricular arrhythmias
- Preexisting cardiac dysfunction
- Hypotension or shock
- Respiratory dysfunction
- Severe hepatic or renal insufficiency
- Preexisting seizure disorders
- Severely debilitated animals
- Last trimester of pregnancy (particularly in cattle)
- Dehydrated or debilitated ruminants
- Urinary tract obstruction (ruminants)
- Intra-arterial injection (may cause severe seizures and collapse)
- Cardiovascular disease
- Systemic disease affecting cardiovascular performance
- Geriatric patients
- Pregnant animals
์ด์๋ฐ์
- Emesis (especially in cats, occasionally dogs)
- Muscle tremors
- Bradycardia with partial A-V block
- Reduced respiratory rate and tidal volume
- Sudden movement or kicking in response to sharp auditory stimuli (especially horses)
- Increased urination (cats, cattle)
- Bloat from aerophagia (dogs, cattle)
- Sweating (horses)
- Salivation, ruminal atony, regurgitation, and diarrhea (cattle)
- Premature parturition (cattle)
- Transient hypertension followed by hypotension
- Decreased mucociliary clearance (horses)
- Cardiovascular depression (bradycardia, arrhythmias)
- Vomiting (especially in cats)
- Diuresis (suppression of ADH secretion)
์ฝ๋ฌผ ์ํธ์์ฉ
- Acepromazine ยท Potential for additive hypotensive effects; use cautiously in animals susceptible to hemodynamic complications.
- Chloramphenicol ยท Prolonged sedation and gastrointestinal stasis possible.
- CNS Depressants (barbiturates, narcotics, anesthetics, phenothiazines) ยท Additive CNS depression. Dosages of these agents may need to be reduced.
- Epinephrine ยท May induce the development of ventricular arrhythmias (with or without concurrent halothane).
- Reserpine ยท May cause colic-like clinical signs in horses; concurrent use should be avoided.
- Anaesthetic agents ยท Significantly reduces the dose of all other anaesthetic agents required to maintain anaesthesia. ยท major
- Sympathomimetic amines ยท Increased risk of severe cardiac arrhythmias. ยท major
๋ชจ๋ํฐ๋ง
- Level of anesthesia/analgesia
- Respiratory function (rate, depth, tidal volume)
- Cardiovascular status (heart rate, rhythm, blood pressure)
- Hydration status (especially if polyuria is present)
- Heart rate and rhythm (ECG)
- Blood pressure
- Respiratory rate and depth
- Blood glucose (in susceptible patients)
๊ณผ์ฉ๋
In the event of an accidental overdosage, profound **CNS and respiratory depression**, **hypotension**, and **cardiac arrhythmias** may occur. Seizures have also been reported. * **Reversal Agents:** Alpha-2 antagonists such as **yohimbine**, **atipamezole**, and **tolazoline** can be used alone or in combination to reverse the effects of xylazine and speed recovery times. * **Supportive Care:** Mechanical respiratory support and respiratory stimulants (e.g., doxapram) may be required to treat severe respiratory depressant effects.
VetSheet ์ฝ๋ฌผ ๋ ํผ๋ฐ์ค๋ ๋ฉดํ ์์ ์ ๋ฌธ๊ฐ๋ฅผ ์ํ ์์ ์์ฌ๊ฒฐ์ ๋ณด์กฐ ๋๊ตฌ์ด๋ฉฐ, ์ ๋ฌธ์ ํ๋จ์ด๋ ์ ์กฐ์ฌ์ ์ต์ ๋ผ๋ฒจ์ ๋์ ํ์ง ์์ต๋๋ค.