Alternatively, we suggest using this opportunity to take a little break from work and read some of the interesting articles below. Hydroxychloroquine is widely used in the treatment of post-Lyme arthritis. Does plaquenil help with light sensitivity Chloroquine drug resistance What is plaquenil used for in lupus Chloroquine is a medication used to prevent and to treat malaria in areas where malaria is known to be sensitive to its effects. Certain types of malaria, resistant strains, and complicated cases typically require different or additional medication. Occasionally it is used for amebiasis that is occurring outside the intestines, rheumatoid arthritis, and lupus erythematosus. Small amounts of hydroxychloroquine can be found in breastmilk, but international experts indicate this medication is acceptable while breastfeeding. MECHANISM OF ACTION. Plaquenil increases the pH of lysosomes and impairs complement-dependent antigen-antibody reactions. It also inhibits the chemotaxis of eosinophils and locomotion of neutrophils. Although the precise mechanism of action is unknown, hydroxychloroquine may suppress immune function by interfering with the processing and presentation of antigens and the production of cytokines. And caution is required if patients have certain heart conditions, diabetes, psoriasis etc. It may have both an anti-spirochaete activity and an anti-inflammatory activity, similar to the treatment of rheumatoid arthritis. Hydroxychloroquine mechanism of action Hydroxychloroquine DermNet NZ, Hydroxychloroquine Plaquenil RheumTutor Risk of plaquenil toxicityPlaquenil effect on heartPlaquenil how long to work Mechanism of action The precise mechanism by which hydroxychloroquine exhibits activity against. Plasmodium. is not known. Hydroxychloroquine, like chloroquine, is a weak base and may exert its effect by concentrating in the acid vesicles of the parasite and by inhibiting polymerization of heme. PLAQUENIL HYDROXYCHLOROQUINE SULFATE TABLETS, USP DESCRIPTION. Hydroxychloroquine. Hydroxychloroquine Plaquenil -. Hydroxychloroquine is also a disease-modifying anti-rheumatic drug DMARD that has immunomodulatory and anti-inflammatory effects. The exact hydroxychloroquine mechanism of action is unclear, although it does work to interrupt the communication of immune system cells to decrease swelling, pain, and joint damage. 1, 2, 3, 5 Mechanism of action of hydroxychloroquine as an antirheumatic drug. Fox RI1. Author information 1Department of Rheumatology, Scripps Clinic and Research Foundation, La Jolla, CA 92037. The antimalarial agents chloroquine and hydroxychloroquine have been used widely for the treatment of rheumatoid arthritis and systemic lupus erythematosus. Hydroxychloroquine HCQ is recommended for thromboprophylaxis in patients with systemic lupus erythematosus and aPL. We aimed at identifying mechanisms responsible for the beneficial effects of HCQ in the APS.