Classification
Tissue schizonticides - dormant
Blood schizonticides
Gametocides
Tissue schizonticides
Dormant forms
Blood schizonticides
Erythrocytic
Gametocides
Kill sexual stage and prevent transmission to mosquitoes
Target of antimalarial drugs
Blood schizonticides
Suppressive prophylaxis
Blood schizonticides
- 2 weeks before departure and 4 weeks after
Terminal prophylaxis
Premaquine (2 weeks) + chloroquine (last 2 weeks)
For vivax and ovale
Antimalarial drugs
Aminoquinolones
Artemisinn and derivatives
Primaquine
Dihydro folate reductase inhibitors
Quinine
Mefloquine
Aminoquinolines
Chloroquine phosphate
Amodiaquine hydrochloride
Aminoquinolones mechanism of action
Inhibits hemozpin formation from heme
Heme lyses cell membrane
Parasites die
Clinical cure followed by relapse with
Aminoquinolines except in P. falciparum
Radical cure with aminoquinolinones in
P. falciparum only
Aminoquinolinones can also be used as prophylaxis to
Suppress merpzoites before RBC infection
Aminoquinolinones used in this form of amoebiasis only
Hepatic amoebeasis
Uses of aminoquinolinones
MAGI - DMD:
Malaria
Amoebiasis
Giardiasis
Inflammatory
Direct Myocardial Depressant
Aminoquinolinones as mild direct Myocardial depressant
Quinidine like effect
Small dose for short time - almost no adverse effect
Anti malarial aminoquinolinones
Large dose for long time- physiological disturbances and visual disturbances
Anti inflammatory aminoquinolinones
Artemisinin and derivatives
Artesunate
Artemether
Dihydroartemisinin
Water soluble
Artesunate
Dihydroartemisinin
Lipid soluble
Artemether
Rapidly metabolised to dihydroartemissin
Artesunate
Artemether
Artemisinin
Standard care for ttt of uncomplicated falciarum
Artemisinin
Adverse effects of dihydro artemisinin
May be due to underlying malaria rather than medications