Medi-first Ibuprofen
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Questions & Answers
Side Effects & Adverse Reactions
Acyclovir tablets are intended for oral ingestion only. Renal failure, in some cases resulting in death, has been observed with acyclovir therapy (see ADVERSE REACTIONS: Observed During Clinical Practice and OVERDOSAGE). Thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS), which has resulted in death, has occurred in immunocompromised patients receiving acyclovir therapy.
Legal Issues
There is currently no legal information available for this drug.
FDA Safety Alerts
There are currently no FDA safety alerts available for this drug.
Manufacturer Warnings
There is currently no manufacturer warning information available for this drug.
FDA Labeling Changes
There are currently no FDA labeling changes available for this drug.
Uses
Herpes Zoster Infections: Acyclovir tablets, USP are indicated for the acute treatment of herpes zoster (shingles).
Genital Herpes: Acyclovir tablets, USP are indicated for the treatment of initial episodes and the management of recurrent episodes of genital herpes.
Chickenpox: Acyclovir tablets, USP are indicated for the treatment of chickenpox (varicella).
History
There is currently no drug history available for this drug.
Other Information
Acyclovir is a synthetic nucleoside analogue active against herpesviruses. Acyclovir tablets, USP is a formulation for oral administration.
Each Acyclovir Tablet contains 400 mg or 800 mg of acyclovir. In addition, each tablet contains the inactive ingredients colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, povidone and sodium starch glycolate. The 400 mg and 800 mg tablet also contains ferric oxide and FD&C blue lake # 2 Indigo carmine AL, respectively.
Acyclovir USP is a white to off white crystalline powder, slightly hygroscopic with the molecular formula C 8H 11N 5O 3 and a molecular weight of 225.20. The maximum solubility in water at 37°C is 2.5 mg/mL. The pka's of acyclovir are 2.27 and 9.25.
The chemical name of acyclovir is 6H-Purin-6-one, 2-amino-1,9-dihydro-9-[(2-hydroxyethoxy)methyl]-. It has the following structural formula:
Sources
Medi-first Ibuprofen Manufacturers
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Unifirst First Aid Corporation
![Medi-first Ibuprofen (Ibuprofen) Tablet, Coated Medi-first Plus Ibuprofen (Ibuprofen) Tablet, Coated Medique Iprin (Ibuprofen) Tablet, Coated Dover Addaprin (Ibuprofen) Tablet, Coated Otis Clapp Ultraprin (Ibuprofen) Tablet, Coated [Unifirst First Aid Corporation]](/wp-content/themes/bootstrap/assets/img/loading2.gif)
Medi-first Ibuprofen | Blenheim Pharmacal, Inc.
Acute Treatment of Herpes Zoster: 800 mg every 4 hours orally, 5 times daily for 7 to 10 days.
Genital Herpes: Treatment of Initial Genital Herpes: 200 mg every 4 hours, 5 times daily for 10 days.
Chronic Suppressive Therapy for Recurrent Disease: 400 mg 2 times daily for up to 12 months, followed by re-evaluation. Alternative regimens have included doses ranging from 200 mg 3 times daily to 200 mg 5 times daily.
The frequency and severity of episodes of untreated genital herpes may change over time. After 1 year of therapy, the frequency and severity of the patient’s genital herpes infection should be re-evaluated to assess the need for continuation of therapy with acyclovir tablets.
Intermittent Therapy: 200 mg every 4 hours, 5 times daily for 5 days. Therapy should be initiated at the earliest sign or symptom (prodrome) of recurrence.
Treatment of Chickenpox: Children (2 years of age and older): 20 mg/kg per dose orally 4 times daily (80 mg/kg/day) for 5 days. Children over 40 kg should receive the adult dose for chickenpox.
Adults and Children over 40 kg: 800 mg 4 times daily for 5 days.
Intravenous acyclovir is indicated for the treatment of varicella-zoster infections in immunocompromised patients.
When therapy is indicated, it should be initiated at the earliest sign or symptom of chickenpox. There is no information about the efficacy of therapy initiated more than 24 hours after onset of signs and symptoms.
Patients With Acute or Chronic Renal Impairment: In patients with renal impairment, the dose of acyclovir tablets should be modified as shown in Table 3.
Table 3. Dosage Modification for Renal Impairment
Normal Dosage Regimen
Creatinine Clearance
(mL/min/1.73 m 2)
Adjusted Dosage Regimen
Dose (mg)
Dosing Interval 200 mg every 4 hours
> 10
0-10
200
200
every 4 hours, 5x daily
every 12 hours
400 mg every 12 hours
> 10
0-10
400
200
every 12 hours
every 12 hours 800 mg every 4 hours
> 25
10-25
0-10
800
800
800
every 4 hours, 5x daily
every 8 hours
every 12 hoursHemodialysis: For patients who require hemodialysis, the mean plasma half-life of acyclovir during hemodialysis is approximately 5 hours. This results in a 60% decrease in plasma concentrations following a 6-hour dialysis period. Therefore, the patient’s dosing schedule should be adjusted so that an additional dose is administered after each dialysis.
Peritoneal Dialysis: No supplemental dose appears to be necessary after adjustment of the dosing interval.
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