|Trade names||Niclocide, Fenasal, Phenasal, others|
|AHFS/Drugs.com||Micromedex Detailed Consumer Information|
|ATC code||P02DA01 (WHO) QP52AG03 (WHO)|
|Chemical and physical data|
|Molar mass||327.119 g/mol|
|3D model (Jmol)||Interactive image|
|Melting point||225 to 230 °C (437 to 446 °F)|
|(what is this?)|
Niclosamide, sold under the trade name Niclocide among others, is a medication used to treat tapeworm infestations. This includes diphyllobothriasis, hymenolepiasis, and taeniasis. It is not effective against other worms such as pinworms or roundworms. It is taken by mouth.
Side effects include nausea, vomiting, abdominal pain, constipation, and itchiness. It may be used during pregnancy and appears to be safe for the baby. Niclosamide is in the anthelmintic family of medications. It works by blocking the uptake of sugar.
Niclosamide was discovered in 1958. It is on the World Health Organization's List of Essential Medicines, the most important medications needed in a basic health system. The wholesale cost in the developing world is about 0.24 USD for a course of treatment. It is not commercially avaliable in the United States. It is effective in a number of other animals.
Side effects include nausea, vomiting, abdominal pain, constipation, and itchiness. Rarely, dizziness, skin rash, drowsiness, perianal itching, or an unpleasant taste occur. For some of these reasons, praziquantel is a preferable and equally effective treatment for tapeworm infestation.
Mechanism of action
Niclosamide, along with oxyclozanide, another anti-tapeworm drug, was found in a 2015 study to display "strong in vivo and in vitro activity against methicillin-resistant Staphylococcus aureus (MRSA)". A 2016 drug repurposing screening study suggested that niclosamide may inhibit Zika virus replication in vitro.
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