Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take chloroquine with all of your drugs and health problems. Oct plaquenil Drug warnings for plaquenil Mechanism of Action Chloroquine is an antimalarial agent. While the drug can inhibit certain enzymes, its effect is believed to result, at least in part, from its interaction with DNA. An important mode of action of chloroquine and hydroxychloroquine is the interference of lysosomal activity and autophagy. Inhibition of DNA replication is proposed as a general mechanism of the antimicrobial action of chloroquine. The drug chloroquine is bactericidal for Bacillus megaterium ; it inhibits DNA and RNA biosynthesis and produces rapid degradation of ribosomes and dissimilation of ribosomal RNA. For all uses of chloroquine: WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Do not start, stop, or change the dose of any drug without checking with your doctor. What is the mechanism of action of chloroquine Effects of chloroquine on viral infections an old drug., Mechanisms of action of hydroxychloroquine and chloroquine. Hydroxychloroquine neck stiff neck pain Chloroquine has a negative inotropic action, inhibits spontaneous diastolic depolarization, slows conduction, lengthens the effective refractory period and raises the electrical threshold. This results in depression of contractility, impairment of conductivity, decrease of excitability, but with possible abnormal stimulus re-entry mechanism. Chloroquine C18H26ClN3 - PubChem. Chloroquine Mode of Action Science. Chloroquine Indications, Side Effects, Warnings -. Mechanism of Action Chloroquine, a 4-aminoquinoline, is an anti-protozoal agent. The precise mechanism by which Chloroquine exhibits activity is not known. Chloroquine, may exert its effect against Plasmodium species by concentrating in the acid vesicles of the parasite and by inhibiting polymerization of heme. It can also inhibit certain enzymes by its interaction with DNA. It is caused by protozoan parasites belonging to the Plasmodium genus and transmitted by an infected female Anopheles mosquito. This disease affects mainly children aged less than 5 years. Among the four species of malarial parasite which infect humans. Specifically it is used for chloroquine -sensitive malaria. Other uses include treatment of rheumatoid arthritis, lupus, and porphyria cutanea tarda. It is taken by mouth. Common side effects include vomiting, headache, changes in vision and muscle weakness. Severe side effects may include allergic reactions.