pengertian dosis
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PENGERTIAN DOSIS
PENGERTIAN UMUM :
JUMLAH OBAT YANG DIBERIKAN
KEPADA PENDERITA DALAM
SATUAN BERAT :
g, mg, µg
ATAU SATUAN ISI :
ml , liter , ui (unit internasional)
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PENGERTIAN DOSIS
• DOSIS MEDICINALIS= DOSIS LAZIM =
DOSIS TERAPEUTIK
•
SEJUMLAH OBAT YANG MEMBERIKAN
EFEK TERAPEUTIK PADA PENDERITA
DEWASA
• DOSIS : SEJUMLAH OBAT YANG
DIBERIKAN SATU KALI ATAU SELAMA
JANGKA WAKTU TERTENTU
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DOSIS AWAL (LOADING DOSE)
ATAU
DOSIS PERMULAAN (INITIAL DOSE)
DOSIS OBAT UNTUK MEMULAI TERAPI
SEHINGGA DAPAT MENCAPAI
KONSENTRASI TERAPEUTIK DALAM
TUBUH YANG MENGHASILKAN EFEK
KLINIS
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DOSIS PEMELIHARAAN
(MAINTENANCE DOSE)
Dosis obat yang diperlukan untuk
memelihara sampai mempertahankan
efek klinik atau konsentrasi terapeutik
obat yang Sesuai dengan dosis regimen
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ISTILAH LAIN
• DOSIS MAKSIMUM (MD)
• DOSIS TOXICA : lebih besar
dari dosis maksimum
• DOSIS LETALIS (LD)
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KADAR ZAT
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Persen Massa (% Massa)
• Persen massa menyatakan jumlah gram zat
terlarut dalam seratus gram larutan
%100pelarutgrutzat terlargr
AzatmassaAzatmassa%
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Contoh Soal
• Pada 50 gram asam cuka mengandung 10 gr
asam asetat. Hitunglah kadar asam cuka
tersebut?
20%%100gram50
gram10CukaAsam%
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Persen volume (% volume)
• Persen volume menyatakan jumlah liter
zat terlarut dalam seratus liter larutan
%100larutanVolume
XzatVolumeXzatVolume%
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Contoh Soal
• Dalam label akohol yang dijual di toko obat
tercantum kadar alkohol 70%. Berapa ml
alkohol yang terdapat dalam 500 ml larutan
alkohol tersebut?
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Jawaban
• Misal volume alkohol murni = x ml
350adalah70%alkohollarutanml500dalamalkoholvolume jadi
350
100
35000
35000100
50070100:alkohollarutandalampersamaan
%70%100ml500
mlxmurniAlkohol%
x
x
x
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