Mepacrine

Mepacrine Uses, Dosage, Side Effects, Food Interaction and all others data.

An acridine derivative formerly widely used as an antimalarial but superseded by chloroquine in recent years. It has also been used as an anthelmintic and in the treatment of giardiasis and malignant effusions. It is used in cell biological experiments as an inhibitor of phospholipase A2.

Mepacrine has been used as an antimalarial drug and as an antibiotic. It is used to treat giardiasis, a protozoal infection of the intestinal tract, and certain types of lupus erythematosus, an inflammatory disease that affects the joints, tendons, and other connective tissues and organs. Mepacrine may be injected into the space surrounding the lungs to prevent reoccurrence of pneumothorax. The exact way in which quinacrine works is unknown. It appears to interfere with the parasite's metabolism.

Mepacrine
Uses
Dosage
Side Effect
Precautions
Interactions
Uses during Pregnancy
Uses during Breastfeeding
Accute Overdose
Food Interaction
Half Life
Volume of Distribution
Clearance
Interaction With other Medicine
Contradiction
Storage

Trade Name	Mepacrine
Availability	Discontinued
Generic	Quinacrine
Quinacrine Other Names	Mepacrine
Type
Formula	C₂₃H₃₀ClN₃O
Weight	Average: 399.957 Monoisotopic: 399.207740304
Protein binding	80-90%
Groups	Investigational
Therapeutic Class
Manufacturer
Available Country
Last Updated:	September 19, 2023 at 7:00 am

Uses

For the treatment of giardiasis and cutaneous leishmaniasis and the management of malignant effusions.

How Mepacrine works

The exact mechanism of antiparasitic action is unknown; however, quinacrine binds to deoxyribonucleic acid (DNA) in vitro by intercalation between adjacent base pairs, inhibiting transcription and translation to ribonucleic acid (RNA). Mepacrine does not appear to localize to the nucleus of Giaridia trophozoites, suggesting that DNA binding may not be the primary mechanism of its antimicrobial action. Fluorescence studies using Giardia suggest that the outer membranes may be involved. Mepacrine inhibits succinate oxidation and interferes with electron transport. In addition, by binding to nucleoproteins, quinacrine suppress the lupus erythematous cell factor and acts as a strong inhibitor of cholinesterase.

Toxicity

Oral, rat: LD₅₀ = 900 mg/kg; Oral, mouse: LD₅₀ = 1000 mg/kg. Symptoms of overdose include seizures, hypotension, cardiac arrhythmias, and cardiovascular collapse.