Product Information

Registration Status: Active

CYBIN INJECTION 100MG/ML is approved to be sold in Singapore with effective from 2013-01-16. It is marketed by MYLAN PHARMACEUTICALS PTE LTD, with the registration number of SIN14293P.

This product contains Cytarabine 100mg/ml in the form of INJECTION, SOLUTION, CONCENTRATE. It is approved for INTRAVENOUS, SUBCUTANEOUS, INTRATHECAL use.

This product is manufactured by Onco Therapies LTD in INDIA.

It is a Prescription Only Medicine that can only be obtained from a doctor or a dentist, or a pharmacist with a prescription from a Singapore-registered doctor or dentist.



A pyrimidine nucleoside analog that is used mainly in the treatment of leukemia, especially acute non-lymphoblastic leukemia. Cytarabine is an antimetabolite antineoplastic agent that inhibits the synthesis of DNA. Its actions are specific for the S phase of the cell cycle. It also has antiviral and immunosuppressant properties. (From Martindale, The Extra Pharmacopoeia, 30th ed, p472)


For the treatment of acute non-lymphocytic leukemia, acute lymphocytic leukemia and blast phase of chronic myelocytic leukemia.

Mechanism of Action

Cytarabine acts through direct DNA damage and incorporation into DNA. Cytarabine is cytotoxic to a wide variety of proliferating mammalian cells in culture. It exhibits cell phase specificity, primarily killing cells undergoing DNA synthesis (S-phase) and under certain conditions blocking the progression of cells from the G1 phase to the S-phase. Although the mechanism of action is not completely understood, it appears that cytarabine acts through the inhibition of DNA polymerase. A limited, but significant, incorporation of cytarabine into both DNA and RNA has also been reported.


Less than 20% of the orally administered dose is absorbed from the gastrointestinal tract.


Cytarabine syndrome may develop - it is characterized by fever, myalgia, bone pain, occasionally chest pain, maculopapular rash, conjunctivitis, and malaise.

Active Ingredient/Synonyms

1-beta-D-Arabinofuranosylcytosine | 4-Amino-1-beta-D-arabinofuranosyl-2(1H)-pyrimidinone | Citarabina | Cytarabinum | Cytosine arabinoside | Cytosine-1-beta-D-arabinofuranoside | cytosine-β-D-arabinofuranoside | Cytarabine |

Source of information: Drugbank (External Link). Last updated on: 3rd July 18. *Trade Name used in the content below may not be the same as the HSA-registered product.


  1. Health Science Authority of Singapore - Reclassified POM
  2. Drugbank