Optimal dosage of ribavirin

A formula to estimate the optimal dosage of ribavirin for the treatment of chronic hepatitis C: influence of ITPA polymorphisms.

BACKGROUND Greater cumulative exposure to ribavirin increases response to interferon-ribavirin combination therapy for hepatitis C but also induces more severe anaemia. Polymorphisms in the ITPA gene protect against ribavirin-induced anaemia. The maximum dosage of ribavirin that can be tolerated by patients with different ITPA polymorphisms remains unknown. METHODS We developed a mathematical...

Biowaiver Monographs for Immediate Release Solid Oral Dosage Forms: Ribavirin.

Literature data relevant to the decision to allow a waiver of in vivo bioequivalence (BE) testing for the approval of immediate release solid oral dosage forms containing ribavirin are reviewed. Ribavirin is highly soluble, but its permeability characteristics are not well defined. Therefore according to the Biopharmaceutical Classification System, and taking a "worst case" approach, ribavirin ...

Optimal administration and dosage of methotrexate.

Methotrexate (MTX) has been used for the treatment of rheumatic diseases, especially rheumatoid arthritis (RA), for some decades now. Although it had been known from pharmacokinetic studies for quite some time already that the bioavailability of MTX is superior when administered parenterally rather than orally, this had never been formally proven to be clinically relevant. In a recent randomise...

Optimal Cialis Dosage - Typical Cialis Cost

Rationale and design of the virological response and ribavirin dosage (VIRID) study in hepatitis.