What is ribavirin toxicity?

The primary clinical toxicity of Ribavirin is hemolytic anemia. The anemia associated with Ribavirin therapy may result in worsening of cardiac disease and lead to fatal and nonfatal myocardial infarctions.

Why ribavirin is contraindicated for pregnant?

Ribavirin Pregnancy Warnings Ribavirin has been assigned to pregnancy category X by the FDA. Nearly all animal studies have revealed evidence of embryolethality and teratogenicity.

What makes ribavirin ineligible?

**Ribavirin(RBV) ineligible/intolerance is defined as meeting one or more of the following criteria: Neutrophils <750 cells/mm3,results within the past month. Hemoglobin < 10g/dL, results within the past month. Platelets <50 000 cells/ mm3, results within the past month.

What class of drug is ribavirin?

Ribavirin is in a class of antiviral medications called nucleoside analogues. It works by stopping the virus that causes hepatitis C from spreading inside the body.

Does ribavirin have a black box warning?

This drug has black box warnings. A black box warning is the most serious warning from the Food and Drug Administration (FDA). A black box warning alerts doctors and patients about drug effects that may be dangerous. Ribavirin usage warning: Ribavirin shouldn’t be used alone to treat your hepatitis C virus infection.

How long does ribavirin stay in your system?

When ribavirin’s side effects do appear, though, they can last longer or be worse than side effects from other drugs. One reason for this is that ribavirin takes a long time to leave your body. In fact, ribavirin can stay in your body’s tissues for up to six months after you stop taking it.

What is teratogenic action?

Teratogenic drugs: A teratogen is an agent that can disturb the development of the embryo or fetus. Teratogens halt the pregnancy or produce a congenital malformation (a birth defect). Classes of teratogens include radiation, maternal infections, chemicals, and drugs.

Can a pregnant woman take ribavirin?

Ribavirin, used in combination with an interferon, is used for the treatment of chronic hepatitis C. Ribavirin is a Federal Drug Administration Pregnancy Category X product, indicating that its use is contraindicated in women who are pregnant.

Can tenofovir treat HCV?

Tenofovir is currently one of the safest nucleos(t)ide analogues, due to its low hepatotoxicity and its lack of negative interference on treatment of HCV infection.

What hazardous risk category is ribavirin?

Specific target organ toxicity – single ex- posure, Category 3 H335: May cause respiratory irritation.

What are the side effects of ribavirin treatment?

Nausea, diarrhea, stomach upset, headache, dizziness, blurred vision, trouble sleeping, cough, low appetite, weight loss or gain, dry skin, or changes in taste/hearing may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

Does ribavirin cause hair loss?

Ribavirin is reported to cause photoallergic reactions. We report two cases of alopecia universalis, with complete hair loss extended to the whole body, secondary to PEG-interferon and ribavirin combination therapy for chronic hepatitis C virus infection.

What are teratogenic drugs?

Drugs that can cause birth defects are said to be ‘teratogenic drugs’. Medical science cannot always predict how exposure to a teratogenic drug will affect a developing fetus. It can be dangerous for a pregnant woman to stop taking prescription drugs if she has a medical condition or becomes ill.

What are the 4 types of teratogens?

Additionally, teratogens may also affect pregnancies and cause complications such as preterm labors, spontaneous abortions, or miscarriages. Teratogens are classified into four types: physical agents, metabolic conditions, infection, and finally, drugs and chemicals.

Is ribavirin an antibiotic?

Is ribavirin (Rebetol) an antibiotic? No, ribavirin (Rebetol) is an oral antiviral medication and is only used for the treatment of chronic hepatitis C. It can’t be used for other types of infections.

What is an example of a drug interaction?

Drug-drug interaction. This is when a medication reacts with one or more other drugs. For example, taking a cough medicine ( antitussive) and a drug to help you sleep (sedative) could cause the two medications to affect each other. Drug-food/drink interaction. This is when something you eat or drink affects a drug.

What is an example of a protein binding interaction?

Distribution: Protein-binding interactions can occur when two or more highly protein-bound drugs compete for a limited number of binding sites on plasma proteins. One example of an interaction is between fenofibric acid (Trilipix), used to lower cholesterol and triglycerides in the blood, and warfarin, a common blood thinner to help prevent clots.

What is the mechanism of action of ritonavir?

Ritonavir may induce glucuronidation and oxidation by CYP1A2, CYP2C8, CYP2C9 and CYP2C19, thereby increasing the biotransformation of some drugs metabolised by these pathways. This may result in decreased systemic exposure of these agents. 34

What causes drug interactions in the stomach?

Drugs that affect stomach or intestine motility, pH, or natural flora can also lead to drug interactions. Distribution: Protein-binding interactions can occur when two or more highly protein-bound drugs compete for a limited number of binding sites on plasma proteins.