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riba pkg insert (part 1) re. riba dose

I am GT 1 and my md only wants to give me 800 mg of riba because I weigh 115 lbs.  Why ?!

•for the treatment of chronic hepatitis C infection (monoinfection) in combination with interferon alfa-2b in patients previously untreated with interferon alpha:
NOTE: Consider response prognostic factors, HCV genotype, viral load, and disease progression evidence such as hepatic inflammation and fibrosis when deciding to treat a pediatric patient. Weigh treatment benefits against potential safety risks identified in clinical trials (see Contraindications/Precautions).
NOTE: The American Association for the Study of Liver Diseases (AASLD) recommends a peginterferon alfa product in combination with ribavirin as the preferred therapy for chronic hepatitis C infection.[20505]
Oral dosage (capsules or oral solution):
Adults > 75 kg: 600 mg PO twice daily (in the morning and evening) plus interferon alfa-2b 3 million international units SC/IM 3 times per week for 24—48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. There are no safety or efficacy data on treatment longer than 48 weeks.[29161]
Adults  73 kg: 15 mg/kg/day PO or 1200 mg/day PO given in 2 divided doses (in the morning and evening) plus interferon alfa-2b 3 million international units SC/IM 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks. NOTE: The manufacturer does not provide a specific maximum dosage for pediatric patients; however, for this indication, the maximum dosage for adults weighing > 75 kg is 1200 mg/day.[29161]
Children and Adolescents 62—73 kg: 15 mg/kg/day PO or 1000 mg/day PO given in 2 divided doses (in the morning and evening) every day plus interferon alfa-2b 3 million international units SC/IM 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks.[29161]
Children and Adolescents 60—61 kg: 15 mg/kg/day PO or 1000 mg/day PO given in 2 divided doses (in the morning and evening) every day plus interferon alfa-2b 3 million international units/m2 SC 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks.[29161]
Children and Adolescents 47—59 kg: 15 mg/kg/day PO or 800 mg/day PO given in 2 divided doses (in the morning and evening) plus interferon alfa-2b 3 million international units/m2 SC 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks.[29161]
Children and Adolescents >= 3 years and < 47 kg: 15 mg/kg/day PO divided twice daily plus interferon alfa-2b 3 million international units/m2 SC 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks.[29161]
Neonates, Infants, and Children  75 kg: 600 mg PO twice daily (in the morning and evening) plus interferon alfa-2b 3 million international units SC/IM 3 times per week for 24 weeks. There are no safety or efficacy data on treatment longer than 24 weeks.[29161]
Adults  73 kg: 15 mg/kg/day PO or 1200 mg/day PO given in 2 divided doses (in the morning and evening) plus interferon alfa-2b 3 million international units SC/IM 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks. NOTE: The manufacturer does not provide a specific maximum dosage for pediatric patients; however, for this indication, the maximum dosage for adults weighing > 75 kg is 1200 mg/day.[29161]
Children and Adolescents 62—73 kg: 15 mg/kg/day PO or 1000 mg/day PO given in 2 divided doses (in the morning and evening) every day plus interferon alfa-2b 3 million international units SC/IM 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks.[29161]
Children and Adolescents 60—61 kg: 15 mg/kg/day PO or 1000 mg/day PO given in 2 divided doses (in the morning and evening) every day plus interferon alfa-2b 3 million international units/m2 SC 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks.[29161]
Children and Adolescents 47—59 kg: 15 mg/kg/day PO or 800 mg/day PO given in 2 divided doses (in the morning and evening) plus interferon alfa-2b 3 million international units/m2 SC 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks.[29161]
Children and Adolescents >= 3 years and < 47 kg: 15 mg/kg/day PO divided twice daily plus interferon alfa-2b 3 million international units/m2 SC 3 times per week. The duration of treatment for genotype 1 is 48 weeks; consider treatment discontinuation if an HCV-RNA value below the level of detection has not been achieved at 24 weeks. The duration of treatment for genotype 2 or 3 is 24 weeks.[29161]
Neonates, Infants, and Children < 3 years: Safety and efficacy have not been established.
25 Responses
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317787 tn?1473358451
Hi I am having the same question as you are, I am 140 lbs 5' 5" and my prescription is for riba 800 mg and 120 for pegintron, I am worried it is too little so am calling the doc on Monday
In 2008 I also took 1000 Riba and 180 Pegasys maybe with the third drug it is not as important but I want to check.  I want to get to SVR this time
Thanks for the question
Dee
Helpful - 0
Avatar universal
Hi everyone, went to see the doctor this morning. I weigh 74kg as of this morning. The doctor agree to  up my dosage another 200 mg to 1200 mg. I am in my 16 week. She  also agree that i should do my best to get the virus cleared on this treatment. I will be seeing her again next week to check the blood count.Thanks again everyone.
Helpful - 0
Avatar universal
thanks all.  I started to worry about this.  I called the NP and got upset on the phone - and I haven't even started tx yet.  They probably will want to put me on anti-depressants ;)
Well...my doctor was involved with incevik trials and he says that my riba dose should be 800 mg per day.   I will try to gather info to support the 1000 mg dose.  And as a last resort,  I am still thinking about  taking an extra 200 mg ( my left -over riba pills from 2008) until i at least reach und.
Helpful - 0
Avatar universal
"200 mg tablets administered orally twice daily at a dose of 1000 mg/day for subjects weighing <75 kg and 1200 mg/day for subjects weighing ≥75 kg "

Good find spectda, sense this is the dose they used in the trials to get the svr results, i would want nothing less.
Helpful - 0
Avatar universal
"A Phase 3 Study of Telaprevir in Combination With Pegasys® and Copegus® in Treatment-Naive Subjects With Genotype 1 HCV
http://clinicaltrials.gov/ct2/show/NCT00627926?term=telaprevir&rank=17

Biological: peginterferon alfa-2a
subcutaneous injection, 180 micrograms once per week
Other Name: Pegasys, Peg-IFN
Drug: telaprevir
375 mg tablets administered orally every 8 hours at a dose of 750 mg
Other Name: TVR, VX-950
Drug: ribavirin
200 mg tablets administered orally twice daily at a dose of 1000 mg/day for subjects weighing <75 kg and 1200 mg/day for subjects weighing ≥75 kg
Other Name: Copegus, RBV"
Helpful - 0
Avatar universal
yeah but you are way tougher than most ....  hi bud
Helpful - 0
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