General Pharma Flashcards
Clearance Formula
Vd x Ke (elimination constant)
0.7 x Vd)/(T-half
In first order kinetic (constant rate).. how long to steady state?
4-5 half-lives.
3.3 half-lives to reach 90% SS
Tachyphylactic Drugs
Decrease response after initial admin
Nitrates, Niacin, Phenylephrine, LSD, MDMA
Zero Order Elimination Drugs
Phenytoin
Ethanol
Aspirin (high conc)
Constant amount eliminated per unit time
First Order
Constant Fraction eliminated per unit time
Weak Acids
Phenobarbital
MTX
Aspirin(Salicylates)
Tx Sodium Bicard to Alkalize Urine
Weak Base
TCA, Amphetamine
Tx Ammonium Cl to acidify urine
Permissive
Cortisol on Catecholamines (NE, Epi)
Presence of Cortisol (A) required for full effect of NE & E (B)
Torsades de Pointes
Anti Arrythmics (IA & III) Anti Biotics (Marcolides) eg Erythromicin Anti PsyChotics (Haloperidol) Anti Depressants (TCA) Anti Emetics (Odansetron)
Prolongs QT Interval
Coronary Vasospasm
Cocaine
AmphetamineSumatriptan
Ergot Alkaloids
(CASE)
DCM
Anthracyclines like Doxorubicin, Daunorubicin
TX Dexrazoxane
DI
Lithium, Demeclocycline
SIADH
Carbamezapine, Cyclophosphamide, SSRIs
Acute Cholestatic Hepatitis, Jaundice
Macrolides like Erthromycin
DRESS- DELAYED HS. 2-8 WEEKS
DRUG RXN WITH EOSINOPHILIA & SYST SS
Allopurinol
AntiConvulsants
AntiBiotics
Sulfa Drugs