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• 0.50 to 5 mg one hour prior to bedtime at final destination or, 1 to 5 mg 1 hour before bedtime for 2 days prior to departure and for 2 to 3 days upon arrival at final destination.
• Eastbound travel- Take a preflight early evening treatment followed by treatment at bedtime for 4 days after arrival.
• Westbound travel- Take for 4 days at bedtime when in the new time zone.

• Cancer patients receiving myelosuppressive chemotherapy
• Patients with Acute Myeloid Leukemia receiving induction or consolidation chemotherapy
• Cancer patients receiving bone marrow transplant
• Patients with severe neutropenia
• Peripheral blood progenitor cell collection and therapy

Parenteral-

Subcutaneous-

• Cancer patients receiving myelosuppressive chemotherapy
• Patients with Acute Myeloid Leukemia receiving induction or consolidation chemotherapy
• Cancer patients receiving bone marrow transplant
• Patients with severe neutropenia
• Peripheral blood progenitor cell collection and therapy

Parenteral-

Subcutaneous-

• Adult: As hydrate: Initially, 225-450 mg bid, increased if necessary.
• Child: >3 yr: As modified-release hydrate: 12 mg/kg daily increased to 24 mg/kg daily in 2 divided doses after 1 wk.

• Adult: Loading dose: 5 mg/kg (ideal body weight) or 250-500 mg (25 mg/ml) by slow inj or infusion over 20-30 min. Maintenance infusion dose: 0.5 mg/kg/hr. Max rate: 25 mg/min.
• Child: Loading dose: same as adult dose. Maintenance dose: 6 mth-9 yr: 1 mg/kg/hr and 10-16 yr: 0.8 mg/kg/hr.
• Elderly: Dose reduction may be necessary.
• Hepatic impairment: Dose reduction may be necessary.

• Adult: As hydrate: Initially, 225-450 mg bid, increased if necessary.
• Child: >3 yr: As modified-release hydrate: 12 mg/kg daily increased to 24 mg/kg daily in 2 divided doses after 1 wk.

• Adult: Loading dose: 5 mg/kg (ideal body weight) or 250-500 mg (25 mg/ml) by slow inj or infusion over 20-30 min. Maintenance infusion dose: 0.5 mg/kg/hr. Max rate: 25 mg/min.
• Child: Loading dose: same as adult dose. Maintenance dose: 6 mth-9 yr: 1 mg/kg/hr and 10-16 yr: 0.8 mg/kg/hr.
• Elderly: Dose reduction may be necessary.
• Hepatic impairment: Dose reduction may be necessary.

Tablet and Suspension:

• 200 mg tid or 400 mg bid for 7 days
• 800 mg in the morning and 1-2 gm at night for 2 days
• 2 gm as a single dose for 1 days

• Children 7-10 yrs: 100 mg tid
• Children 3-7 yrs: 100 mg bid
• Children 1-3 yrs: 50 mg tid

• 800 mg tid for 5 days

• Children 7-10 yrs: 400 mg tid
• Children 3-7 yrs: 200 mg qid
• Children 1-3 yrs: 200 mg tid

• 400-800 mg tid for 5-10 days

• Children 7-10 yrs: 200-400 mg tid
• Children 3-7 yrs: 100-200 mg qid
• Children 1-3 yrs: 100-200 mg tid

• 2 gm once daily for 3 days

• Children 7-10 yrs: 1 gm once daily
• Children 3-7 yrs: 600-800 mg once daily
• Children 1-3 yrs: 500 mg once daily

• 200 mg tid for 3 days

• Children 7-10 yrs: 100 mg tid
• Children 3-7 yrs: 100 mg bid
• Children 1-3 yrs: 50 mg tid

• 200 mg tid for 3-7 days

• 400 mg bid for 7 days
• 2 gm as a single dose for 1 days

• 400 mg tid for 7 days

• 800 mg initially and then 400 mg tid for 7 days

• Children 1-10 yrs: 7.5 mg/kg tid

• 400 mg tid started 24  hours before  surgery for 1 days

• Children 1-10 yrs: 7.5 mg/kg tid

Vaginal Gel:

Suppository:

• Adults: 1 g every 8 hours for 3 days, then 1 g every 12 hours.
• Children: 5-10 years: 500 mg every 8 hours for 3 days, then every 12 hours, Over 10 years adult dose.

• Adults: 1 g 2 hours before surgery; up to 3 further doses of 1 g may be given every 8 hours for high risk procedures.
• Children: 5-10 years: 500 mg 2 hours before surgery; up to 3 further doses of 500 mg may be given every 8 hours for high risk procedures.

IV Infusion:

• Adults and children over 12 years: Infuse 500 mg 8 hourly at a rate of 5 ml/minute and a maximum of 4 g should not be exceeded during a 24-hour period. Treatment for 7 days is sufficient for most patients, but treatment can be extended, especially for cases where reinfection is likely. For surgical prophylaxis, administration shortly before surgery should be followed by 8-hourly doses for the next 24 hours.
• Children under 12 years: 7.5 mg/kg body weight/day every 8 hours at a rate of 5 ml/minute.

• If for compelling reasons, metronidazole must be administered longer than the usually recommended duration, it is recommended that hematological tests, especially leucocyte count should be carried out regularly and that patients should be monitored for adverse reactions such as peripheral or central neuropathy (such as paresthesia, ataxia, dizziness, convulsive seizures).
• Metronidazole should be administered with caution to patients with hepatic encephalopathy.
• Patients should be warned that metronidazole may darken urine.

• Disulfiram: Psychotic reactions have been reported in patients who were using metronidazole and disulfiram concurrently.
• Alcohol: Alcoholic beverages and drugs containing alcohol should not be consumed during therapy and for at least one day afterwards because of the possibility of a disulfiram-like (antabuse effect) reaction (flushing, vomiting, tachycardia). Oral anticoagulant therapy (warfarin type): Potentiation of the anticoagulant effect and increased hemorrhagic risk caused by decreased hepatic catabolism. In case of co-administration, prothrombin time should be more frequently monitored and anticoagulant therapy adjusted during treatment with metronidazole.
• Lithium: Plasma levels of lithium may be increased by metronidazole.
• Cyclosporin: Serum cyclosporin and serum creatinine should be closely monitored when co-administration is necessary.
• Phenytoin or phenobarbital: increased elimination of metronidazole resulting in reduced plasma levels.
• 5-Fluorouracil: Reduced clearance of 5-fluorouracil resulting in increased toxicity of 5-fluorouracil.
• Busulfan: Plasma levels of busulfan may be increased by metronidazole, which may lead to severe busulfan toxicity.

Tablet and Suspension:

• 200 mg tid or 400 mg bid for 7 days
• 800 mg in the morning and 1-2 gm at night for 2 days
• 2 gm as a single dose for 1 days

• Children 7-10 yrs: 100 mg tid
• Children 3-7 yrs: 100 mg bid
• Children 1-3 yrs: 50 mg tid

• 800 mg tid for 5 days

• Children 7-10 yrs: 400 mg tid
• Children 3-7 yrs: 200 mg qid
• Children 1-3 yrs: 200 mg tid

• 400-800 mg tid for 5-10 days

• Children 7-10 yrs: 200-400 mg tid
• Children 3-7 yrs: 100-200 mg qid
• Children 1-3 yrs: 100-200 mg tid

• 2 gm once daily for 3 days

• Children 7-10 yrs: 1 gm once daily
• Children 3-7 yrs: 600-800 mg once daily
• Children 1-3 yrs: 500 mg once daily

• 200 mg tid for 3 days

• Children 7-10 yrs: 100 mg tid
• Children 3-7 yrs: 100 mg bid
• Children 1-3 yrs: 50 mg tid

• 200 mg tid for 3-7 days

• 400 mg bid for 7 days
• 2 gm as a single dose for 1 days

• 400 mg tid for 7 days

• 800 mg initially and then 400 mg tid for 7 days

• Children 1-10 yrs: 7.5 mg/kg tid

• 400 mg tid started 24  hours before  surgery for 1 days

• Children 1-10 yrs: 7.5 mg/kg tid

Vaginal Gel:

Suppository:

• Adults: 1 g every 8 hours for 3 days, then 1 g every 12 hours.
• Children: 5-10 years: 500 mg every 8 hours for 3 days, then every 12 hours, Over 10 years adult dose.

• Adults: 1 g 2 hours before surgery; up to 3 further doses of 1 g may be given every 8 hours for high risk procedures.
• Children: 5-10 years: 500 mg 2 hours before surgery; up to 3 further doses of 500 mg may be given every 8 hours for high risk procedures.

IV Infusion:

• Adults and children over 12 years: Infuse 500 mg 8 hourly at a rate of 5 ml/minute and a maximum of 4 g should not be exceeded during a 24-hour period. Treatment for 7 days is sufficient for most patients, but treatment can be extended, especially for cases where reinfection is likely. For surgical prophylaxis, administration shortly before surgery should be followed by 8-hourly doses for the next 24 hours.
• Children under 12 years: 7.5 mg/kg body weight/day every 8 hours at a rate of 5 ml/minute.

• If for compelling reasons, metronidazole must be administered longer than the usually recommended duration, it is recommended that hematological tests, especially leucocyte count should be carried out regularly and that patients should be monitored for adverse reactions such as peripheral or central neuropathy (such as paresthesia, ataxia, dizziness, convulsive seizures).
• Metronidazole should be administered with caution to patients with hepatic encephalopathy.
• Patients should be warned that metronidazole may darken urine.

• Disulfiram: Psychotic reactions have been reported in patients who were using metronidazole and disulfiram concurrently.
• Alcohol: Alcoholic beverages and drugs containing alcohol should not be consumed during therapy and for at least one day afterwards because of the possibility of a disulfiram-like (antabuse effect) reaction (flushing, vomiting, tachycardia). Oral anticoagulant therapy (warfarin type): Potentiation of the anticoagulant effect and increased hemorrhagic risk caused by decreased hepatic catabolism. In case of co-administration, prothrombin time should be more frequently monitored and anticoagulant therapy adjusted during treatment with metronidazole.
• Lithium: Plasma levels of lithium may be increased by metronidazole.
• Cyclosporin: Serum cyclosporin and serum creatinine should be closely monitored when co-administration is necessary.
• Phenytoin or phenobarbital: increased elimination of metronidazole resulting in reduced plasma levels.
• 5-Fluorouracil: Reduced clearance of 5-fluorouracil resulting in increased toxicity of 5-fluorouracil.
• Busulfan: Plasma levels of busulfan may be increased by metronidazole, which may lead to severe busulfan toxicity.

Tablet and Suspension:

• 200 mg tid or 400 mg bid for 7 days
• 800 mg in the morning and 1-2 gm at night for 2 days
• 2 gm as a single dose for 1 days

• Children 7-10 yrs: 100 mg tid
• Children 3-7 yrs: 100 mg bid
• Children 1-3 yrs: 50 mg tid

• 800 mg tid for 5 days

• Children 7-10 yrs: 400 mg tid
• Children 3-7 yrs: 200 mg qid
• Children 1-3 yrs: 200 mg tid

• 400-800 mg tid for 5-10 days

• Children 7-10 yrs: 200-400 mg tid
• Children 3-7 yrs: 100-200 mg qid
• Children 1-3 yrs: 100-200 mg tid

• 2 gm once daily for 3 days

• Children 7-10 yrs: 1 gm once daily
• Children 3-7 yrs: 600-800 mg once daily
• Children 1-3 yrs: 500 mg once daily

• 200 mg tid for 3 days

• Children 7-10 yrs: 100 mg tid
• Children 3-7 yrs: 100 mg bid
• Children 1-3 yrs: 50 mg tid

• 200 mg tid for 3-7 days

• 400 mg bid for 7 days
• 2 gm as a single dose for 1 days

• 400 mg tid for 7 days

• 800 mg initially and then 400 mg tid for 7 days

• Children 1-10 yrs: 7.5 mg/kg tid

• 400 mg tid started 24  hours before  surgery for 1 days

• Children 1-10 yrs: 7.5 mg/kg tid

Vaginal Gel:

Suppository:

• Adults: 1 g every 8 hours for 3 days, then 1 g every 12 hours.
• Children: 5-10 years: 500 mg every 8 hours for 3 days, then every 12 hours, Over 10 years adult dose.

• Adults: 1 g 2 hours before surgery; up to 3 further doses of 1 g may be given every 8 hours for high risk procedures.
• Children: 5-10 years: 500 mg 2 hours before surgery; up to 3 further doses of 500 mg may be given every 8 hours for high risk procedures.

IV Infusion:

• Adults and children over 12 years: Infuse 500 mg 8 hourly at a rate of 5 ml/minute and a maximum of 4 g should not be exceeded during a 24-hour period. Treatment for 7 days is sufficient for most patients, but treatment can be extended, especially for cases where reinfection is likely. For surgical prophylaxis, administration shortly before surgery should be followed by 8-hourly doses for the next 24 hours.
• Children under 12 years: 7.5 mg/kg body weight/day every 8 hours at a rate of 5 ml/minute.

• If for compelling reasons, metronidazole must be administered longer than the usually recommended duration, it is recommended that hematological tests, especially leucocyte count should be carried out regularly and that patients should be monitored for adverse reactions such as peripheral or central neuropathy (such as paresthesia, ataxia, dizziness, convulsive seizures).
• Metronidazole should be administered with caution to patients with hepatic encephalopathy.
• Patients should be warned that metronidazole may darken urine.

• Disulfiram: Psychotic reactions have been reported in patients who were using metronidazole and disulfiram concurrently.
• Alcohol: Alcoholic beverages and drugs containing alcohol should not be consumed during therapy and for at least one day afterwards because of the possibility of a disulfiram-like (antabuse effect) reaction (flushing, vomiting, tachycardia). Oral anticoagulant therapy (warfarin type): Potentiation of the anticoagulant effect and increased hemorrhagic risk caused by decreased hepatic catabolism. In case of co-administration, prothrombin time should be more frequently monitored and anticoagulant therapy adjusted during treatment with metronidazole.
• Lithium: Plasma levels of lithium may be increased by metronidazole.
• Cyclosporin: Serum cyclosporin and serum creatinine should be closely monitored when co-administration is necessary.
• Phenytoin or phenobarbital: increased elimination of metronidazole resulting in reduced plasma levels.
• 5-Fluorouracil: Reduced clearance of 5-fluorouracil resulting in increased toxicity of 5-fluorouracil.
• Busulfan: Plasma levels of busulfan may be increased by metronidazole, which may lead to severe busulfan toxicity.

Tablet and Suspension:

• 200 mg tid or 400 mg bid for 7 days
• 800 mg in the morning and 1-2 gm at night for 2 days
• 2 gm as a single dose for 1 days

• Children 7-10 yrs: 100 mg tid
• Children 3-7 yrs: 100 mg bid
• Children 1-3 yrs: 50 mg tid

• 800 mg tid for 5 days

• Children 7-10 yrs: 400 mg tid
• Children 3-7 yrs: 200 mg qid
• Children 1-3 yrs: 200 mg tid

• 400-800 mg tid for 5-10 days

• Children 7-10 yrs: 200-400 mg tid
• Children 3-7 yrs: 100-200 mg qid
• Children 1-3 yrs: 100-200 mg tid

• 2 gm once daily for 3 days

• Children 7-10 yrs: 1 gm once daily
• Children 3-7 yrs: 600-800 mg once daily
• Children 1-3 yrs: 500 mg once daily

• 200 mg tid for 3 days

• Children 7-10 yrs: 100 mg tid
• Children 3-7 yrs: 100 mg bid
• Children 1-3 yrs: 50 mg tid

• 200 mg tid for 3-7 days

• 400 mg bid for 7 days
• 2 gm as a single dose for 1 days

• 400 mg tid for 7 days

• 800 mg initially and then 400 mg tid for 7 days

• Children 1-10 yrs: 7.5 mg/kg tid

• 400 mg tid started 24  hours before  surgery for 1 days

• Children 1-10 yrs: 7.5 mg/kg tid

Vaginal Gel:

Suppository:

• Adults: 1 g every 8 hours for 3 days, then 1 g every 12 hours.
• Children: 5-10 years: 500 mg every 8 hours for 3 days, then every 12 hours, Over 10 years adult dose.

• Adults: 1 g 2 hours before surgery; up to 3 further doses of 1 g may be given every 8 hours for high risk procedures.
• Children: 5-10 years: 500 mg 2 hours before surgery; up to 3 further doses of 500 mg may be given every 8 hours for high risk procedures.

IV Infusion:

• Adults and children over 12 years: Infuse 500 mg 8 hourly at a rate of 5 ml/minute and a maximum of 4 g should not be exceeded during a 24-hour period. Treatment for 7 days is sufficient for most patients, but treatment can be extended, especially for cases where reinfection is likely. For surgical prophylaxis, administration shortly before surgery should be followed by 8-hourly doses for the next 24 hours.
• Children under 12 years: 7.5 mg/kg body weight/day every 8 hours at a rate of 5 ml/minute.

• If for compelling reasons, metronidazole must be administered longer than the usually recommended duration, it is recommended that hematological tests, especially leucocyte count should be carried out regularly and that patients should be monitored for adverse reactions such as peripheral or central neuropathy (such as paresthesia, ataxia, dizziness, convulsive seizures).
• Metronidazole should be administered with caution to patients with hepatic encephalopathy.
• Patients should be warned that metronidazole may darken urine.

• Disulfiram: Psychotic reactions have been reported in patients who were using metronidazole and disulfiram concurrently.
• Alcohol: Alcoholic beverages and drugs containing alcohol should not be consumed during therapy and for at least one day afterwards because of the possibility of a disulfiram-like (antabuse effect) reaction (flushing, vomiting, tachycardia). Oral anticoagulant therapy (warfarin type): Potentiation of the anticoagulant effect and increased hemorrhagic risk caused by decreased hepatic catabolism. In case of co-administration, prothrombin time should be more frequently monitored and anticoagulant therapy adjusted during treatment with metronidazole.
• Lithium: Plasma levels of lithium may be increased by metronidazole.
• Cyclosporin: Serum cyclosporin and serum creatinine should be closely monitored when co-administration is necessary.
• Phenytoin or phenobarbital: increased elimination of metronidazole resulting in reduced plasma levels.
• 5-Fluorouracil: Reduced clearance of 5-fluorouracil resulting in increased toxicity of 5-fluorouracil.
• Busulfan: Plasma levels of busulfan may be increased by metronidazole, which may lead to severe busulfan toxicity.

• Bronchial asthma
• Bronchospasm
• Chronic obstructive pulmonary disease (COPD)
• Pulmonary disease with spastic bronchial component.

• >12 years of age: 10 ml syrup or 200 mg tablet two or three times daily.
• 6-12 years of age: 6-9 mg/kg body weight two times daily, i.e. if body weight is 10 kg, 3 ml (60 mg) two times daily or as prescribed by the physician.

• Bronchial asthma
• Bronchospasm
• Chronic obstructive pulmonary disease (COPD)
• Pulmonary disease with spastic bronchial component.

• >12 years of age: 10 ml syrup or 200 mg tablet two or three times daily.
• 6-12 years of age: 6-9 mg/kg body weight two times daily, i.e. if body weight is 10 kg, 3 ml (60 mg) two times daily or as prescribed by the physician.

• Bronchial asthma
• Bronchospasm
• Chronic obstructive pulmonary disease (COPD)
• Pulmonary disease with spastic bronchial component.

• >12 years of age: 10 ml syrup or 200 mg tablet two or three times daily.
• 6-12 years of age: 6-9 mg/kg body weight two times daily, i.e. if body weight is 10 kg, 3 ml (60 mg) two times daily or as prescribed by the physician.

• Bronchial asthma
• Bronchospasm
• Chronic obstructive pulmonary disease (COPD)
• Pulmonary disease with spastic bronchial component.

• >12 years of age: 10 ml syrup or 200 mg tablet two or three times daily.
• 6-12 years of age: 6-9 mg/kg body weight two times daily, i.e. if body weight is 10 kg, 3 ml (60 mg) two times daily or as prescribed by the physician.

• The usual adult dose is one 625 mg Tablet every 12 hours or one 375 mg Tablet every 8 hours.
• For more severe infections and infections of the respiratory tract, the dose should be one 1 gm Tablet every 12 hours or one 625 mg Tablet every 8 hours.

• Children 6-12 years: 2 teaspoonful every 8 hours.
• Children 1-6years: 1 teaspoonful every 8 hours.
• Children below 1 year: 25 mg/kg/day in divided doses every 8 hours, for example a 7.5 kg child would require 2 ml suspension t.i.d, Treatment should not be extended beyond 14 days without review.

• The usual recommended daily dosage: 25/3.6 mg/kg/day in mild to moderate infections (upper respiratory tract infections e.g. recurrent tonsilitis, lower respiratory infections, and skin and soft tissue infections)।
• For serious infections: 45/6.4 mg/kg/day for the treatment of more serious infections (upper respiratory tract infections, e.g. otitis media and sinusitis, lower respiratory infections e.g. bronchopneumonia, and urinary tract infections).

• 25/3.6 mg/kg/day (Suspension)
• 2-6 years (13-21 kg) 2.5 ml suspension b.i.d
• 7-12years (22-40kg) 5 ml suspension b.i.d

• 45/6.4 mg/kg/day (Forte Suspension)
• 2-6 years (13-21 kg) 5 ml suspension b.i.d
• 7-12 years (22-40 kg) 10 ml suspension b.i.d

• Usually, 1.2 gm every 8 hours
• Increased in more serious infections to 1.2 gm every 6 hours
• For surgical prophylaxis: The usual dose is 1.2 gm at induction, for high risk procedures (eg. colorectal surgery) up to 2-3 gm may be given every 8 hours.

• 0 to 3 months: 30 mg/kg every 8 hours. (every 12 hours in the perinatal period and in premature infants.
• 3 months to 12 years: Usually 30 mg/kg every 8 hours increased in more serious infection to 30 mg/kg every 6 hours.

• Mild impairment (Creatinine clearance> 30ml/minute): No changein dosage.
• Moderate impairment (Creatinine clearance 10-30 ml/minute): One 375 Tablet or one 625 Tablet 12 hourly or 1.2 gm IV followed by 0.6 gm IV 12 hourly.
• Severe impairment (Creatinine clearance <10 ml/minute): Not more than one 375 mg tablet 12 hourly or 1.2 gm IV followed by 0.6 gm IV 24 hourly. Dialysis decreases serum concentrations of this preparation and an additional 0.6 gm IV dose may need to be given during dialysis and at the end of dialysis.

• A similar reduction in dosage should be made for children.
• Administration hepatic impairment: Dose with caution; monitor hepatic function at regular intervals.