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Uses
Zidovudine Syrup (Zidovudine oral solution USP), a nucleoside reverse transcriptase inhibitor, is indicated in combination with other antiretroviral agents for the treatment of HIV-1 infection.
Zidovudine Syrup (Zidovudine oral solution USP) is indicated for the prevention of maternal-fetal HIV-1 transmission [see Dosage and Administration (2.3)]. The indication is based on a dosing regimen that included 3 components:
- antepartum therapy of HIV-1 infected mothers
- intrapartum therapy of HIV-1 infected mothers
- post-partum therapy of HIV-1 exposed neonate.
Points to consider prior to initiating zidovudine in pregnant women for the prevention of maternal-fetal HIV-1 transmission include:
- In most cases, zidovudine for prevention of maternal-fetal HIV-1 transmission should be given in combination with other antiretroviral drugs.
- Prevention of HIV-1 transmission in women who have received zidovudine for a prolonged period before pregnancy has not been evaluated.
- Because the fetus is most susceptible to the potential teratogenic effects of drugs during the first 10 weeks of gestation and the risks of therapy with zidovudine during that period are not fully known, women in the first trimester of pregnancy who do not require immediate initiation of antiretroviral therapy for their own health may consider delaying use; this indication is based on use after 14 weeks gestation.
History
There is currently no drug history available for this drug.
Other Information
Zidovudine (formerly called azidothymidine [AZT]) is a pyrimidine nucleoside analogue active against HIV-1. The chemical name of zidovudine is 3'-azido-3'-deoxythymidine; it has the following structural formula:
Zidovudine
Zidovudine is a white to beige, odorless, crystalline solid with a molecular weight of 267.24 and a solubility of 20.1 mg per mL in water at 25°C. The molecular formula is C10H13N5O4.
Zidovudine Syrup (Zidovudine oral solution USP) is for oral administration. Each teaspoonful (5 mL) of Zidovudine Syrup (Zidovudine oral solution USP) contains 50 mg of zidovudine and the inactive ingredients are sodium benzoate 0.2% (added as a preservative), citric acid, flavors, glycerin, and sucrose.
Complies with HPLC Procedure 2 of the USP monograph.
Sources
Zidovudine Syrup Manufacturers
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Cipla Limited
Zidovudine Syrup | Cipla Ltd.
2.1 Adult - Treatment of HIV-1 InfectionOral Dosing
The recommended oral dose of zidovudine is 300 mg twice daily in combination with other antiretroviral agents.
2.2 Pediatric Patients (Aged 4 Weeks to Less than 18 Years)Healthcare professionals should pay special attention to accurate calculation of the dose of zidovudine, transcription of the medication order, dispensing information, and dosing instructions to minimize risk for medication dosing errors.
Prescribers should calculate the appropriate dose of zidovudine for each child based on body weight (kg) and should not exceed the recommended adult dose.
Before prescribing zidovudine capsules or tablets, children should be assessed for the ability to swallow capsules or tablets. If a child is unable to reliably swallow a zidovudine capsule or tablet, the zidovudine oral solution should be prescribed.
The recommended dosage in pediatric patients aged 4 weeks to less than 18 years and weighing greater than or equal to 4 kg is provided in Table 1. Zidovudine oral solution should be used to provide accurate dosage when whole tablets or capsules are not appropriate.
Table 1: Recommended Pediatric Oral Dosage of Zidovudine Body Weight (kg)
Total Daily Dose
Dosage Regimen and Dose
b.i.d.
t.i.d.
4 to <9
24 mg/kg/day
12 mg/kg
8 mg/kg
≥9 to <30
18 mg/kg/day
9 mg/kg
6 mg/kg
≥30
600 mg/day
300 mg
200 mg
Alternatively, dosing for zidovudine can be based on body surface area (BSA) for each child. The recommended oral dose of zidovudine is 480 mg per m2 per day in divided doses (240 mg per m2 twice daily or 160 mg per m2 three times daily). In some cases the dose calculated by mg/kg will not be the same as that calculated by BSA.
2.3 Prevention of Maternal-Fetal HIV-1 TransmissionThe recommended dosage regimen for administration to pregnant women (greater than 14 weeks of pregnancy) and their neonates is:
Maternal Dosing
100 mg orally 5 times per day until the start of labor [see Clinical Studies (14.3)]. During labor and delivery, intravenous zidovudine should be administered at 2 mg per kg (total body weight) over 1 hour followed by a continuous intravenous infusion of 1 mg per kg per hour (total body weight) until clamping of the umbilical cord.
Neonatal Dosing
Start neonatal dosing within 12 hours after birth and continue through 6 weeks of age. Neonates unable to receive oral dosing may be administered zidovudine intravenously. See Table 2.
Table 2. Recommended Neonatal Dosages of Zidovudine Route
Total Daily Dose
Dose and Dosage Regimen
Oral
8 mg/kg/day
2 mg/kg every 6 hours
Intravenous
6 mg/kg/day
1.5 mg/kg infused over 30 minutes, every 6 hours
2.4 Patients with Severe Anemia and/or NeutropeniaSignificant anemia (hemoglobin less than 7.5 g per dL or reduction greater than 25% of baseline) and/or significant neutropenia (granulocyte count less than 750 cells per mm3 or reduction greater than 50% from baseline) may require a dose interruption until evidence of marrow recovery is observed [see Warnings and Precautions (5.1)]. In patients who develop significant anemia, dose interruption does not necessarily eliminate the need for transfusion. If marrow recovery occurs following dose interruption, resumption in dose may be appropriate using adjunctive measures such as epoetin alfa at recommended doses, depending on hematologic indices such as serum erythropoietin level and patient tolerance.
2.5 Patients with Renal ImpairmentIn patients maintained on hemodialysis or peritoneal dialysis or with creatinine clearance (CrCl) by Cockcroft-Gault less than 15 mL per min, the recommended dosage is 100 mg every 6 to 8 hours.
2.6 Patients with Hepatic ImpairmentThere are insufficient data to recommend dose adjustment of zidovudine in patients with impaired hepatic function or liver cirrhosis. Frequent monitoring of hematologic toxicities is advised [see Use in Specific Populations (8.7)].
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Edenbridge Pharmaceuticals, Llc
Zidovudine Syrup | Edenbridge Pharmaceuticals, Llc
2.1 Treatment of HIV-1 InfectionAdults: The recommended oral dose of zidovudine is 600 mg/day in divided doses in combination with other antiretroviral agents.
Pediatric Patients (Aged 4 Weeks to <18 Years): Healthcare professionals should pay special attention to accurate calculation of the dose of Zidovudine, transcription of the medication order, dispensing information, and dosing instructions to minimize risk for medication dosing errors.
Prescribers should calculate the appropriate dose of zidovudine for each child based on body weight (kg) and should not exceed the recommended adult dose.
Before prescribing Zidovudine Capsules or Tablets, children should be assessed for the ability to swallow capsules or tablets. If a child is unable to reliably swallow a Zidovudine Capsule or Tablet, the Zidovudine oral solution should be prescribed.
The recommended dosage in pediatric patients 4 weeks of age and older and weighing ≥4 kg is provided in Table 1. Zidovudine oral solution should be used to provide accurate dosage when whole tablets or capsules are not appropriate.
Table 1: Recommended Pediatric Dosage of Zidovudine Body Weight (kg) Total Daily Dose Dosage Regimen and Dose Twice Daily Three Times Daily 4 to <9 24 mg/kg/day 12 mg/kg 8 mg/kg ≥9 to <30 18 mg/kg/day 9 mg/kg 6 mg/kg ≥30 600 mg/day 300 mg 200 mgAlternatively, dosing for zidovudine can be based on body surface area (BSA) for each child. The recommended oral dose of zidovudine is 480 mg/m2/day in divided doses (240 mg/m2 twice daily or 160 mg/m2 three times daily). In some cases the dose calculated by mg/kg will not be the same as that calculated by BSA.
2.2 Prevention of Maternal-Fetal HIV-1 TransmissionThe recommended dosage regimen for administration to pregnant women (>14 weeks of pregnancy) and their neonates is:
Maternal Dosing: 100 mg orally 5 times per day until the start of labor [see Clinical Studies (14.3)]. During labor and delivery, intravenous zidovudine should be administered at 2 mg/kg (total body weight) over 1 hour followed by a continuous intravenous infusion of 1 mg/kg/hour (total body weight) until clamping of the umbilical cord.
Neonatal Dosing: Start neonatal dosing within 12 hours after birth and continue through 6 weeks of age. Neonates unable to receive oral dosing may be administered zidovudine intravenously. See Table 2.
Table 2. Recommended Neonatal Dosages of Zidovudine Route Total Daily Dose Dose and Dosage Regimen Oral 8 mg/kg/day 2 mg/kg every 6 hours IV 6 mg/kg/day 1.5 mg/kg infused over 30 minutes, every 6 hours 2.3 Patients With Severe Anemia and/or NeutropeniaSignificant anemia (hemoglobin <7.5 g/dL or reduction >25% of baseline) and/or significant neutropenia (granulocyte count <750 cells/mm3 or reduction >50% from baseline) may require a dose interruption until evidence of marrow recovery is observed [see Warnings and Precautions (5.1)]. In patients who develop significant anemia, dose interruption does not necessarily eliminate the need for transfusion. If marrow recovery occurs following dose interruption, resumption in dose may be appropriate using adjunctive measures such as epoetin alfa at recommended doses, depending on hematologic indices such as serum erythropoetin level and patient tolerance.
2.4 Patients With Renal ImpairmentEnd-Stage Renal Disease: In patients maintained on hemodialysis or peritoneal dialysis, the recommended dosage is 100 mg every 6 to 8 hours [see Clinical Pharmacology (12.3)].
2.5 Patients With Hepatic ImpairmentThere are insufficient data to recommend dose adjustment of zidovudine in patients with mild to moderate impaired hepatic function or liver cirrhosis.
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Aurobindo Pharma Limited
Zidovudine Syrup | Aurobindo Pharma Limited
2.1 Adults-Treatment of HIV-1 InfectionOral Dosing
2.2 Pediatric Patients (Aged 4 Weeks to Less than 18 Years)
The recommended oral dose of zidovudine oral solution is 300 mg twice daily in combination with other antiretroviral agents.Healthcare professionals should pay special attention to accurate calculation of the dose of zidovudine oral solution, transcription of the medication order, dispensing information, and dosing instructions to minimize risk for medication dosing errors.
Prescribers should calculate the appropriate dose of zidovudine oral solution for each child based on body weight (kg) and should not exceed the recommended adult dose.
Before prescribing zidovudine capsules or tablets, children should be assessed for the ability to swallow capsules or tablets. If a child is unable to reliably swallow a zidovudine capsule or tablet, the zidovudine syrup (zidovudine oral solution, USP) formulation should be prescribed.
The recommended oral dosage in pediatric patients 4 weeks to less than 18 years and weighing greater than or equal to 4 kg is provided in Table 1. Zidovudine oral solution should be used to provide accurate dosage when whole tablets or capsules are not appropriate.
Table 1: Recommended Pediatric Oral Dosage of Zidovudine Oral Solution Body Weight (kg) Total Daily Dose Dosage Regimen and Dose Twice Daily Three Times Daily 4 to <9
24 mg/kg/day
12 mg/kg
8 mg/kg
≥9 to <30
18 mg/kg/day
9 mg/kg
6 mg/kg
≥30
600 mg/day
300 mg
200 mg
Alternatively, dosing for zidovudine oral solution can be based on body surface area (BSA) for each child. The recommended oral dose of zidovudine oral solution is 480 mg per m2 per day in divided doses (240 mg per m2 twice daily or 160 mg per m2 three times daily). In some cases the dose calculated by mg per kg will not be the same as that calculated by BSA.
2.3 Prevention of Maternal-Fetal HIV-1 TransmissionThe recommended dosage regimen for administration to pregnant women (greater than 14 weeks of pregnancy) and their neonates is:
Maternal Dosing: 100 mg orally 5 times per day until the start of labor [see Clinical Studies (14.3)]. During labor and delivery, intravenous zidovudine should be administered at 2 mg per kg (total body weight) over 1 hour followed by a continuous intravenous infusion of 1 mg per kg per hour (total body weight) until clamping of the umbilical cord.
Neonatal Dosing: Start neonatal dosing within 12 hours after birth and continue through 6 weeks of age. Neonates unable to receive oral dosing may be administered zidovudine intravenously. See Table 2.
Table 2. Recommended Neonatal Dosages of Zidovudine Route
Total Daily Dose
Dose and Dosage Regimen
Oral
8 mg/kg/day
2 mg/kg every 6 hours
Intravenous
6 mg/kg/day
1.5 mg/kg infused over 30 minutes, every 6 hours
2.4 Patients With Severe Anemia and/or NeutropeniaSignificant anemia (hemoglobin less than 7.5 g per dL or reduction greater than 25% of baseline) and/or significant neutropenia (granulocyte count less than 750 cells per mm3 or reduction greater than 50% from baseline) may require a dose interruption until evidence of marrow recovery is observed [see Warnings and Precautions (5.1)]. In patients who develop significant anemia, dose interruption does not necessarily eliminate the need for transfusion. If marrow recovery occurs following dose interruption, resumption in dose may be appropriate using adjunctive measures such as epoetin alfa at recommended doses, depending on hematologic indices such as serum erythropoetin level and patient tolerance.
2.5 Patients With Renal ImpairmentIn patients maintained on hemodialysis or peritoneal dialysis or with creatinine clearance (CrCl) by Cockcroft-Gault less than 15 mL per min, the recommended oral dosage is 100 mg every 6 to 8 hours [see Use in Specific Populations (8.6),Clinical Pharmacology (12.3)].
2.6 Patients With Hepatic ImpairmentThere are insufficient data to recommend dose adjustment of zidovudine oral solution in patients with impaired hepatic function or liver cirrhosis. Frequent monitoring of hematologic toxicities is advised [see Use in Specific Populations (8.7)].
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