Pyrazinoisoquinoline anthelmintic
Praziquantel
Increases parasite calcium permeability, producing tetanic contraction and tegument damage in susceptible trematodes and cestodes.
Primary Mechanism of Action
Clinical / Scientific
Praziquantel affects voltage-operated calcium channels in schistosomes and other flatworms, causing rapid calcium influx, muscle contraction, and vacuolization of the tegument, which exposes the parasite to host immunity.
Pathway Targets
Parasite calcium channels
Scientific explanation
Increased Ca2+ permeability and tetany.
Pathway Convergence
Clinical / Scientific
Target → pathway → downstream effect → biological consequence. This is a mechanistic map, not a treatment claim.
Tegumental injury
Target to downstream effect: Ca2+ influx → Tetanic contraction → Tegument disruption → Immune attack
Mechanistically Relevant Repurposed & Adjunctive Applications
Schistosomiasis and labelled cestode/trematode infections
EstablishedMechanistic rationale
Established anthelmintic for labelled flatworm infections.
Mechanistic Application Matrix
| Biological Target | Mechanism | Potential Relevance | Evidence Level |
|---|---|---|---|
| Ca2+ channels | Permeability increase | Flatworm neuromuscular / tegument integrity | Established mechanism |
In Plain Language
Praziquantel lets extra calcium into worm muscle and skin-like covering, cramping the parasite and exposing it to the immune system.
Mechanistic information is provided for scientific and educational purposes. Discussion of biological pathways or investigational applications does not establish clinical efficacy or constitute individualized medical advice.