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Plaquenil

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Plaquenil

CLINICAL PHARMACOLOGY

ACTIONS

The drug possesses antimalarial actions and also exerts a beneficial effect in lupus erythematosus (chronic discoid or systemic) and acute or chronic rheumatoid arthritis. The precise mechanism of action is not known.

MALARIA

Like chloroquine phosphate, USP, PLAQUENIL (hydroxychloroquine) is highly active against the erythrocytic forms of P. vivax and malariae and most strains of P. falciparum (but not the gametocytes of P. falciparum).

PLAQUENIL (hydroxychloroquine) does not prevent relapses in patients with vivax or malariae malaria because it is not effective against exo-erythrocytic forms of the parasite, nor will it prevent vivax or malariae infection when administered as a prophylactic. It is highly effective as a suppressive agent in patients with vivax or malariae malaria, in terminating acute attacks, and significantly lengthening the interval between treatment and relapse. In patients with falciparum malaria, it abolishes the acute attack and effects complete cure of the infection, unless due to a resistant strain of P. falciparum.

Last reviewed on RxList: 10/4/2010
This monograph has been modified to include the generic and brand name in many instances.

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Plaquenil - User Reviews

Plaquenil User Reviews

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