๋๋ ธํ๋ก์คํธ ํธ๋ก๋ฉํ๋ฏผ
๋๋ ธํ๋ก์คํธ ํธ๋ก๋ฉํ๋ฏผ์ ์ฒ์ฐ ํ๋ก์คํ๊ธ๋๋ F2์ํ(PGF2ฮฑ)์ ํธ๋ก๋ฉํ๋ฏผ ์ผ์ผ๋ก, ์ฌ๋ฌ ๋๋ฌผ์ ์์ ๋ฒ์ ์ํ์์ ๋๋ฆฌ ์ฌ์ฉ๋ฉ๋๋ค. * **๋๋๋ฌผ**: ์ฃผ๋ก ์, ๋ง, ๋ผ์ง ๋ฐ ์ํ ๋ฐ์ถ๋๋ฌผ์ ๋ฐ์ ๋๊ธฐํ, ๋์ฑ ๋ฐ์ ์น๋ฃ, ์๊ถ์ถ๋์ฆ ์น๋ฃ๋ฅผ ์ํ ํฉ์ฒด์ฉํด์ ๋ฐ ์ ์ฐ ์ ๋์ ๋๋ ๋ถ๋ง ์ ๋์ ๋ก ์ฌ์ฉ๋ฉ๋๋ค. * **์๋๋ฌผ**: ๊ฐ์ ๊ณ ์์ด์์ ์ ์ฐ ์ ๋์ ๋ฐ ๊ฐ๋ฐฉํ ์๊ถ์ถ๋์ฆ์ ๋ณด์กฐ์ ๋ด๊ณผ ์น๋ฃ์ ๋ก ํ๊ฐ ์ธ(off-label) ์ฌ์ฉ๋ฉ๋๋ค. > **์์ ์์ **: ๋๋ ธํ๋ก์คํธ๋ ๊ฐ์์ ์น๋ฃ ์ง์๊ฐ ๋งค์ฐ ์ข์ต๋๋ค. ๋ฐ์์น์ฌ๋(LD50)์ด ๊ถ์ฅ ์น๋ฃ ์ฉ๋์ ์ฝ 5๋ฐฐ์ ๋ถ๊ณผํ๋ฏ๋ก ์ ํํ ํฌ์ฌ์ ์ธ์ฌํ ๋ชจ๋ํฐ๋ง์ด ํ์์ ์ ๋๋ค. ์๊ถ์ถ๋์ฆ์ ๋ํ ์ต์ ํ๋กํ ์ฝ์ ์์ ์ฑ ํ๋กํ์ผ์ด ๋ ๋์ ์๊ธ๋ ํ๋ฆฌ์คํค๊ณผ ํด๋กํ๋ก์คํ ๋ ๋๋ ๋ฏธ์ํ๋ก์คํจ์ ๋ณ์ฉ์ ์ ํธํ๋ ์ถ์ธ์ ๋๋ค.
์์ฉ ๊ธฐ์ : Dinoprost acts directly as a **prostaglandin F2alpha (PGF2ฮฑ)** analog. * **Luteolysis**: Binds to specific PGF2ฮฑ receptors on the corpus luteum โ inhibits steroidogenesis โ induces structural and functional regression of the corpus luteum (luteolysis) โ rapid decline in serum progesterone levels. * **Myometrial Contraction**: Directly stimulates myometrial smooth muscle activity โ increases intracellular calcium โ induces strong uterine contractions. * **Cervical Relaxation**: Promotes relaxation and dilation of the cervix, facilitating the expulsion of uterine contents (fetus or purulent material in pyometra).
๋๋ฌผ ์ข ๋ณ ์ฉ๋
- Estrus synchronization ยท 8 mg IM on day 5 of estrous cycle and repeat in 11 days ยท IM ยท twice, 11 days apart ยท 11 days
- Abortifacient (first two months of pregnancy) ยท 10-15 mg IM ยท IM ยท once ยท once ยท Abortion takes place within 72 hours.
- Estrus synchronization ยท 8 mg IM on day 4 of estrous cycle and repeat in 11 days ยท IM ยท twice, 11 days apart ยท 11 days
- Pseudopregnancy (hydrometra/mucometra) ยท 5 mg IM once ยท IM ยท once ยท once
- Abortifacient ยท 5-10 mg IM throughout entire pregnancy ยท IM ยท once ยท once ยท Abortion takes place in 4-5 days.
- Induce parturition ยท 2.5-20 mg on days 144-149 ยท IM ยท once ยท once ยท Higher dosage (20 mg) yields more predictable interval to delivery.
- Treatment of pyometra ยท Initially 0.1 mg/kg SC, then 0.25 mg/kg SC once a day for 5 days ยท SC ยท once daily ยท 6 days total ยท Give bactericidal antibiotics concurrently. Not recommended in animals >8 yrs old.
- Abortifacient ยท 2 mg (total dose) per cat IM once a day beginning at day 33 ยท IM ยท once daily ยท Not specified ยท Side effects include prostration, vomiting and diarrhea.
ํฌ์ฌ ๊ฒฝ๋ก
๊ธ๊ธฐ
- Pregnancy (unless abortion or induced parturition is desired)
- Intravenous (IV) administration
- Animals with bronchoconstrictive respiratory disease (e.g., asthma, 'heaves' in horses)
- Mares with acute or subacute disorders of the vascular system, GI tract, respiratory system, or reproductive tract
- Camelids (associated with acute toxicity and death)
- Relative contraindication: Closed-cervix pyometra
- Extreme caution in elderly (>8 years old) or debilitated animals, or those with severe cardiopulmonary, renal, or hepatic disease
์ด์๋ฐ์
- Dogs/Cats: Abdominal pain, emesis, defecation, urination, pupillary dilation followed by constriction, tachycardias, restlessness, anxiety, fever, hypersalivation, dyspnea, panting. Fatalities are possible (especially in dogs). Cats may exhibit intense grooming and vocalization.
- Cattle: Infection at injection site, salivation, hyperthermia (especially at higher doses).
- Swine: Erythema, pruritus, urination, defecation, slight ataxia, hyperpnea, dyspnea, nesting behavior, abdominal muscle spasms, tail movements, increased vocalization, salivation.
- Horses: Transient decreased body temperature, sweating. Less frequently: increased respiratory and heart rates, ataxia, abdominal pain, lying down.
์ฝ๋ฌผ ์ํธ์์ฉ
- Other oxytocic agents ยท Activity may be enhanced by dinoprost.
- Progestins ยท Reduced effect of dinoprost would be expected with concomitant administration.
๋ชจ๋ํฐ๋ง
- Cardiorespiratory effects (especially in dogs and cats, particularly after higher dosages)
- Adverse effects (vomiting, diarrhea, hyperthermia, distress)
- Efficacy of treatment (e.g., ultrasound for pyometra resolution or pregnancy termination, observation for estrus)
๊ณผ์ฉ๋
Dogs are highly sensitive to the toxic effects of dinoprost. The LD50 in the bitch is reported to be **5.13 mg/kg SC**, which is only about 5 times greater than the recommended dose used by some clinicians. In large animals (cattle, swine, horses), overdose quantities (e.g., 5-10X recommended doses) result in exaggerated adverse effects such as hyperthermia, vomiting, and severe abdominal cramping. **Treatment**: If clinical signs are severe in any species, immediate supportive and symptomatic therapy is recommended.
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