General Principles of Pharmacotherapy for Extraintestinal Helminthiases
Successful treatment of extraintestinal parasitic infections is based on strict pharmacokinetic and pharmacodynamic requirements for medicinal substances:
- Pharmacokinetics: Drugs must possess high bioavailability and be well-absorbed in the gastrointestinal tract. This ensures the establishment of necessary therapeutic concentrations directly within the host's tissues.
- Pharmacodynamics: The action of the drugs is based on the principle of selective toxicity against the helminth's metabolism while minimizing harm to the human body.
Classification of Anthelmintic Drugs
Depending on the breadth of their therapeutic action, drugs in this group are divided into two main categories:
- Universal (broad-spectrum):
- Mebendazole
- Praziquantel
- Specific (narrow-spectrum):
- Chloxyl
- Diethylcarbamazine
Characteristics of the Specific Drug: Chloxyl
Chloxyl (also known as hexachloroparaxylol) belongs to specific narrow-spectrum agents.
- Indications: Its primary efficacy has been proven in the treatment of hepatic trematodiases, such as fascioliasis and clonorchiasis.
- Side Effects: Administration may be accompanied by allergic reactions, eosinophilia, and pain in the cardiac and hepatic regions.
- Contraindications: The drug is strictly contraindicated in hepatic dysfunction, organic myocardial lesions, and during pregnancy.