ํด๋ ๋ง์คํด
ํด๋ ๋ง์คํด์ ์๋ ๋ฅด๊ธฐ ์ฆ์ ์ํ์ ์ฌ์ฉ๋๋ 1์ธ๋ ์ํ์ฌ์๋ฏผ๊ณ ํญํ์คํ๋ฏผ์ ์ ๋๋ค. ํญ์ฝ๋ฆฐ ์์ฉ์ด ๊ฐํ ๋ฐ๋ฉด ์ง์ ์์ฉ์ ๋น๊ต์ ์ ์ ๊ฒ์ด ํน์ง์ ๋๋ค. ๊ฐ์ ๋ง์์ ๊ฒฝ๊ตฌ ์์ฒด์ด์ฉ๋ฅ ์ด ๋งค์ฐ ๋ฎ์ ๊ฒฝ๊ตฌ ํฌ์ฌ ์์ ์น๋ฃ ํจ๊ณผ๊ฐ ๋ถํ์คํฉ๋๋ค.
์์ฉ ๊ธฐ์ : Like other first-generation antihistamines, clemastine acts as a competitive antagonist (or inverse agonist) at **H1-receptors**. * **Mechanism:** Competes with histamine for H1-receptor sites on effector cells (smooth muscle, endothelium, CNS) โ prevents histamine-induced bronchoconstriction, vasodilation, and increased capillary permeability. * **Note:** It does *not* block the release of histamine from mast cells or basophils, but rather antagonizes its downstream effects. * Exhibits significant **anticholinergic (antimuscarinic)** activity, which contributes to both its drying effects on mucous membranes and potential side effects.
๋๋ฌผ ์ข ๋ณ ์ฉ๋
- Antihistamine ยท 0.68 mg per cat PO twice daily ยท PO ยท q12h
- Antihistamine ยท 0.34-0.68 mg per cat PO q12h ยท PO ยท q12h
- Atopy ยท 0.15 mg/kg PO q 12 hrs ยท PO ยท q12h ยท Efficacy may be increased by combining with omega 3 fatty acids.
- Allergic conditions (Historical dosing - Efficacy doubtful) ยท 0.05-0.1 mg/kg PO q12h ยท PO ยท q12h ยท Oral bioavailability is <5%. An oral dose of 0.5 mg/kg only slightly inhibited wheal formation. Further dosing studies are needed before recommending therapeutic oral use.
์ฉ๋์ ๋ฉดํ ์์ ์ ๋ฌธ๊ฐ๋ฅผ ์ํ ์์ ์ฐธ๊ณ ์๋ฃ์ ๋๋ค. ํญ์ ์ต์ ๋ผ๋ฒจ๊ณผ ๊ฐ๋ณ ํ์์ ๋ํด ํ์ธํ์ญ์์ค.
ํฌ์ฌ ๊ฒฝ๋ก
๊ธ๊ธฐ
- Known hypersensitivity to clemastine
์ด์๋ฐ์
- Sedation (dogs)
- Paradoxical hyperactivity (dogs)
- Anticholinergic effects: dry mucous membranes, tachycardia, urinary retention
- Diarrhea (cats)
- Fixed drug reaction (cats - rare)
์ฝ๋ฌผ ์ํธ์์ฉ
- CNS Depressant Medications (e.g., barbiturates, tranquilizers) ยท Additive CNS depression may occur.
- Monoamine Oxidase Inhibitors (e.g., furazolidone, amitraz, selegiline) ยท May intensify the anticholinergic effects of clemastine.
- CNS Depressants (e.g., phenobarbital, gabapentin, opioids) ยท Additive CNS depression and sedation ยท moderate
- Anticholinergic drugs ยท Additive anticholinergic effects (dry mouth, urinary retention) ยท moderate
๋ชจ๋ํฐ๋ง
- Clinical efficacy (reduction in pruritus, allergic signs)
- Adverse effects (sedation, hyperactivity, anticholinergic signs)
๊ณผ์ฉ๋
There are no specific antidotes for clemastine overdose. * **Management:** Handle significant overdoses using standard gut-emptying protocols (emesis/gastric lavage) when appropriate, followed by supportive therapy. * **Clinical Signs:** Overdose signs are extensions of the drug's side effects, principally **CNS depression** (though CNS stimulation/seizures may occur), severe **anticholinergic effects** (severe drying of mucous membranes, tachycardia, urinary retention, hyperthermia), and possibly hypotension. * **Specific Treatments:** **Physostigmine** may be considered to treat serious CNS anticholinergic effects. **Diazepam** can be employed to treat seizures if necessary.
VetSheet ์ฝ๋ฌผ ๋ ํผ๋ฐ์ค๋ ๋ฉดํ ์์ ์ ๋ฌธ๊ฐ๋ฅผ ์ํ ์์ ์์ฌ๊ฒฐ์ ๋ณด์กฐ ๋๊ตฌ์ด๋ฉฐ, ์ ๋ฌธ์ ํ๋จ์ด๋ ์ ์กฐ์ฌ์ ์ต์ ๋ผ๋ฒจ์ ๋์ ํ์ง ์์ต๋๋ค.