ํ๋์ค๋ฆฐ V ์นผ๋ฅจ
**ํ๋์ค๋ฆฐ V ์นผ๋ฅจ**์ ์ฒ์ฐ ํ์ ์คํํธ๋ผ **๋ฒ ํ๋ฝํ๊ณ ํญ์์ **์ ๋๋ค. ํ๋์ค๋ฆฐ G์ ๋นํด ์์ฐ์ ๋ํ ์ ํญ์ฑ์ด ๊ฐํ์ฌ ๋จ์๋๋ฌผ์์ ๊ฒฝ๊ตฌ ํฌ์ฌ ์ ํก์์จ์ด ๋ ์ข์ต๋๋ค.
์์ฉ ๊ธฐ์ : Penicillin V is a **time-dependent, bactericidal** antibiotic. It works by targeting the bacterial cell wall: 1. Binds to specific **penicillin-binding proteins (PBPs)** (such as **transpeptidases** and **carboxypeptidases**) located inside the bacterial cytoplasmic membrane. 2. Inhibits the third and final stage of bacterial cell wall synthesis by preventing the cross-linking of **peptidoglycan** strands. 3. This leads to a defective, osmotically unstable cell wall (spheroplast) โ **cell lysis** and death. *Note: Like all beta-lactams, it is only effective against actively growing and dividing bacteria.*
๋๋ฌผ ์ข ๋ณ ์ฉ๋
- Susceptible infections ยท 5.5-11 mg/kg ยท PO ยท q6-8h
- Soft tissue infections ยท 10 mg/kg ยท PO ยท q8h ยท 7 days
- Susceptible infections ยท 110,000 U/kg (68.75 mg/kg) ยท PO ยท q8h ยท May yield supra-optimal levels against uncomplicated infections by sensitive organisms
- Susceptible infections ยท 110,000 U/kg ยท PO ยท q6-12h
- Susceptible infections ยท 5.5-11 mg/kg ยท PO ยท q6-8h
- Soft tissue infections ยท 10 mg/kg ยท PO ยท q8h ยท 7 days
์ฉ๋์ ๋ฉดํ ์์ ์ ๋ฌธ๊ฐ๋ฅผ ์ํ ์์ ์ฐธ๊ณ ์๋ฃ์ ๋๋ค. ํญ์ ์ต์ ๋ผ๋ฒจ๊ณผ ๊ฐ๋ณ ํ์์ ๋ํด ํ์ธํ์ญ์์ค.
ํฌ์ฌ ๊ฒฝ๋ก
๊ธ๊ธฐ
- Known hypersensitivity to penicillins
- Oral administration in patients with septicemia, shock, or grave illness (due to delayed/diminished GI absorption)
- Use in sensitive species (snakes, birds, turtles, guinea pigs, chinchillas) without extreme caution
์ด์๋ฐ์
- GI effects (anorexia, vomiting, diarrhea)
- Hypersensitivity reactions (rashes, fever, eosinophilia, anaphylaxis)
- Antibiotic-associated diarrhea and superinfections (due to altered gut flora)
- Neurotoxicity (e.g., ataxia in dogs) at very high doses
- Elevated liver enzymes
- Tachypnea, dyspnea, edema, and tachycardia (reported in dogs)
์ฝ๋ฌผ ์ํธ์์ฉ
- Aminoglycosides ยท In vitro synergism against certain bacteria; however, mixing them in the same syringe or fluid line can cause physical inactivation of the aminoglycoside.
- Bacteriostatic Antibiotics (e.g., chloramphenicol, erythromycin, tetracyclines) ยท May antagonize the bactericidal activity of penicillins, which require actively dividing bacteria to be effective.
- Methotrexate ยท Penicillins may decrease the renal elimination of methotrexate, potentially increasing its toxicity.
- Probenecid ยท Competitively blocks the renal tubular secretion of penicillins, significantly increasing their serum levels and half-lives.
๋ชจ๋ํฐ๋ง
- Clinical efficacy (resolution of infection signs)
- Adverse GI effects
- Signs of hypersensitivity or allergic reaction
๊ณผ์ฉ๋
Acute oral overdoses are unlikely to cause significant problems other than **gastrointestinal distress** (vomiting, diarrhea). In humans, massive overdoses of parenteral penicillins (especially in patients with renal impairment) have induced **CNS effects** and seizures. Treatment is supportive.
VetSheet ์ฝ๋ฌผ ๋ ํผ๋ฐ์ค๋ ๋ฉดํ ์์ ์ ๋ฌธ๊ฐ๋ฅผ ์ํ ์์ ์์ฌ๊ฒฐ์ ๋ณด์กฐ ๋๊ตฌ์ด๋ฉฐ, ์ ๋ฌธ์ ํ๋จ์ด๋ ์ ์กฐ์ฌ์ ์ต์ ๋ผ๋ฒจ์ ๋์ ํ์ง ์์ต๋๋ค.