ribavirin
PrintTrade Name(s): Virazole, Rebetol, Ribavirin | |
Group 3: Reproductive Hazard | AHFS Class: Nucleosides and Nucleotides |
Activity | Gloves | Gown | Eye/Face | Mask | Notes/Instructions |
Dispensing prepackaged formulations |
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Counting/Repackaging tablets and capsules | Recommended if pregnant, breast feeding, or trying to conceive | If risk of dust inhalation |
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Repackaging oral liquids | If risk of spill or splash | If risk of inhalation |
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Formulation | Gloves | Gown | Eye/Face | Mask | Notes/Instructions |
Tablet or capsule - from unit dose package | or Recommended if pregnant, breast feeding, or trying to conceive. |
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Liquid - oral or feeding tube | or Recommended if pregnant, breast feeding, or trying to conceive. | Recommended if pregnant, breast feeding, or trying to conceive. | If potential for splash, vomit or spit up. |
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Reference: NIOSH 2016, USP <800>
Type of Instance | Gloves | Gown | Mask | Eye/Face | Notes/Instructions |
Receiving undamaged HD shipping container |
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Receiving damaged HD shipping container | If container must be opened | If container must be opened | If container must be opened |
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Spill Cleanup | Large volume | Large volume |
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Reference: USP <800>
Hazardous Pharmaceutical | Trace Chemo | Biohazardous and Sharps |
1. Non-returnable hazardous, chemo and EPA regulated drugs. (Patient specific prescriptions, partially used blister packs, containers with more than 3% medication remaining) 2. Empty bottles or packaging of P-Listed drugs. (Warfarin, nicotine, epinephrine, nitroglycerin, physostigmine) 3. PPE with visible contamination from hazardous drug. | 1. Waste contaminated through contact with chemotherapeutic agents. (Empty vials, IV bags, syringes and tubing) 2. PPE worn while handling hazardous drugs with NO visible contamination. (Gowns, gloves and masks) 3. Used CSTD devices. | 1. All sharps capable of cutting or piercing the skin. (Needles/syringes, broken ampules, lancets) 2. Items contaminated with blood or other potentially infectious materials. (Tubing, bags or dressings containing blood, contaminated waste from isolation patients) |
Dosage Form | Ship to Institution or Pharmacy | Ship to Locations Outside of ODOC |
Tablets and Capsules |
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Liquid, Topical, and Transdermal |
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PPE | Standards |
Shoe Covers |
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Gowns |
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Gloves |
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Face Shields |
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Goggles |
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N95 Masks |
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Removal and Disposal |
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Reference: USP <800>
- May damage fertility or the unborn child
Reference: SDS - Cayman Chemical
Only met the NIOSH criteria as a developmental and/or reproductive hazard
Ribavirin is reported to have several mechanism of actions that lead to inhibition of viral RNA and protein synthesis. After activation by adenosine kinase to ribavirin mono-, di-, and triphosphate metabolites. Ribavirin triphosphate (RTP) is the predominant metabolite which directly inhibits viral mRNA polymerase by binding to the nucleotide binding site of the enzyme. This prevents the binding of the correct nucleotides, leading to a reduction in viral replication or to the production of defective virions 7. RTP also demonstrates an inhibitory action on viral mRNA guanylyltransferase and mRNA 2′-O-methyltransferase of dengue virus. Inhibition of these enzymes disrupts the posttranslational capping of the 5′ end of viral mRNA through ribavirin being incorporated at the 5′ end in place of guanosine and preventing the cap methylation step.
Inhibition of host inosine monophosphate dehydrogenase (IMPDH) and subsequent depletion of GTP pool is proposed to be another mechanism of action of ribavirin. IMPDH catalyzes the rate-limiting step where inosine 5′-monophosphate is converted to xanthine monophosphate during guanosine monophosphate (GMP) synthesis. GMP is later converted to guanosine triphoshpate (GTP). Ribavirin monophosphate mimics inosine 5′-monophosphate and acts as a competitive inhibitor of IMPDH. Inhibited de novo synthesis of guanine nucleotides and decreased intracellular GTP pools leads to a decline in viral protein synthesis and limit replication of viral genomes 7.Ribavirin acts as a mutagen in the target virus to cause an 'error catastrophe' due to increased viral mutations. RTP pairs with cytidine triphosphate or uridine triphosphate with equal efficiency and to block HCV RNA elongation. It causes premature termination of nascent HCV RNA and increases mutagenesis by producing defective virions 7.
Ribavirin also exerts an immunomodulatory action of the host to the virus by shifting a Th2 response in favor of a Th1 phenotype. Th2 response and production of type 2 cytokines such as IL-4, IL-5, and IL-10 stimulates the humoral response which enhances immunity toward the virus 7. Ribavirin enhanced induction of interferon-related genes, including the interferon-α receptor, and down-regulation of genes involved in interferon inhibition, apoptosis, and hepatic stellate cell activation in vitro 6.Reference: Drug Bank