Gatrex K

Uses

Gatifloxacin is used for the following infections:

• Acute bacterial exacerbation of chronic bronchitis due to Streptococcus pneumoniae, Haemophilus influenzae, Haemophilus parainfluenzae, Moraxella catarrhalis, or Staphylococcus aureus.
• Acute sinusitis due to Streptococcus pneumoniae or Haemophilus influenzae.
• Community-acquired pneumonia due to Streptococcus pneumoniae, Haemophilus influenzae, Haemophilus parainfluenzae, Moraxella catarrhalis, Staphylococcus aureus, Mycoplasma pneumoniae, Chlamydia pneumoniae, or Legionella pneumophila.
• Uncomplicated skin and skin structure infections (i.e., simple abscesses, furuncles, folliculitis, wound infections, and cellulitis) due to Staphylococcus aureus or Streptococcus pyogenes.
• Uncomplicated urinary tract infections due to Escherichia coli, Klebsiella pneumoniae, or Proteus mirabilis.
• Complicated urinary tract infections due to Escherichia coli, Klebsiella pneumoniae, or Proteus mirabilis.
• Pyelonephritis due to Escherichia coli.
• Uncomplicated urethral and cervical gonorrhea due to Neisseria gonorrhoeae.
• Acute, uncomplicated rectal infections in women due to Neisseria gonorrhoeae.

Ketorolac injections and tablets are used for the short-term management of moderate to severe acute post-operative pain.

Gatrex K is also used to associated treatment for these conditions: Bacterial Conjunctivitis, Ocular Infections, Irritations and InflammationsAcute Migraine, Cystoid Macular Edema, Eye Pain, Inflammation, Ocular Itching, Pseudophakic Cystoid Macular Edema, Acute Pericarditis, Acute, moderate Pain, Acute, severe Pain, Chronic aphakic cystoid macular edema, Intraoperative miosis, Postoperative ocular pain

How Gatrex K works

The bactericidal action of Gatifloxacin results from inhibition of the enzymes topoisomerase II (DNA gyrase) and topoisomerase IV, which are required for bacterial DNA replication, transcription, repair, and recombination.

Ketorolac inhibits key pathways in prostaglandin synthesis which is crucial to it's mechanism of action. Although ketorolac is non-selective and inhibits both COX-1 and COX-2 enzymes, it's clinical efficacy is derived from it's COX-2 inhibition. The COX-2 enzyme is inducible and is responsible for converting arachidonic acid to prostaglandins that mediate inflammation and pain. By blocking this pathway, ketorolac achieves analgesia and reduces inflammation. Ketorolac is administered as a racemic mixture; however, the "S" enantiomer is largely responsible for it's pharmacological activity.

Dosage

Gatrex K dosage

Acute Bacterial Exacerbation of Chronic Bronchitis: 400 mg 5 days

Acute Sinusitis: 400 mg 10 days

Community-acquired Pneumonia: 400 mg 7-14 days

Uncomplicated Skin and Skin Structure Infections: 400 mg 7-10 days

Uncomplicated Urinary Tract Infections: 400 mg Single Dose or 200 mg 3 days

Complicated Urinary Tract Infections: 400 mg 7-10 days

Acute Pyelonephritis: 400 mg 7-10 days

Uncomplicated Urethral Gonnorrhea in Men: 400 mg Single dose

Ketorolac Tablet-

Ketorolac Tablet isrecommended for short-term use only (up to 7 days) and are not recommended for chronic use. 10 mg every 4 to 6 hours as required. Doses exceeding 40 mg/day are not recommended. For patients receiving parenteral Ketorolac tromethamine, and who are converted to Ketorolac tromethamine oral tablets, the total combined daily dose should not exceed 90 mg (60 mg for the elderly, renally impaired patients and patients less than 50 kg) and the oral component should not exceed 40 mg on the day the change of formulation is made. Patients should be converted to oral treatment as soon as possible.

Ketorolac injection-

Ketorolac injection may be used as a single or multiple doses, on a regular or when necessary schedule for the management of moderately severe, acute pain that requires analgesia at the opioid level, usually in a postoperative setting. When administering Ketorolac injection, the IV bolus must be given over no less than 15 seconds. The IM administration should be given slowly and deeply into the muscle. The analgesic effect begins within 30 minutes with maximum effect in 1 to 2 hours after dosing IV or IM. Duration of analgesic effect is usually 4 to 6 hours. Single-Dose Treatment: The following regimen should be limited to single administration use only.

IM Dosing (Adult):

• Patients <65 years of age: One dose of 60 mg.
• Patients >65 years of age, renally impaired and/or less than 50 kg of body weight: One dose of 30 mg.

IV Dosing (Adult):

• Patients <65 years of age: One dose of 30 mg.
• Patients >65 years of age, renally impaired and/or less than 50 kg of body weight: One dose of 15 mg.

IV or IM Dosing (2 to 16 years of age):

• IM Dosing: One dose of 1 mg/kg up to a maximum of 30 mg.
• IV Dosing: One dose of 0.5 mg/kg up to a maximum of 15 mg.

Multiple-Dose Treatment (IV or IM):

• Patients <65 years of age: The recommended dose is 30 mg Ketorolac injection every 6 hours. The maximum daily dose should not exceed 120 mg. Patients >65 years of age, renally impaired patients and patients less than 50 kg: The recommended dose is 15 mg Ketorolac injection every 6 hours. The maximum daily dose for these populations should not exceed 60 mg. For breakthrough pain, do not increase the dose or the frequency of Ketorolac Tromethamine.
• Conversion from Parenteral to Oral Therapy: Ketorolac tablets may be used either as monotherapy or as follow-on therapy to parenteral Ketorolac. When Ketorolac tablets are used as a follow-on therapy to parenteral Ketorolac, the total combined daily dose of ketorolac (oral + parenteral) should not exceed 120 mg in younger adult patients or 60 mg in elderly patients on the day the change of formulation is made. On subsequent days, oral dosing should not exceed the recommended daily maximum of 40 mg. Ketorolac IM should be replaced by Ketorolac tablet as soon as feasible. The total duration of combined parenteral andoral treatment should not exceed 5 days.

Ketorolac Nasal spray-

• Adults weighing 50 kg or more: 31.5 mg or 2 spray in each nostril every 6 to 8 hours. Your doctor may adjust your dose if needed. However, the dose is not more than 126 mg (a total of 8 sprays) per day.
• Older adults and adults weighing less than 50 kg:15.75 mg or 1 spray in only one nostril every 6 to 8 hours. However, the dose is usually not more than 63 mg (a total of 4 sprays) per day.
• Children: Use and dose must be determined by your doctor.

Gatifloxacin can be administered without regard to food.

Side Effects

Gatifloxacin is generally well tolerated. The most common side effects that can occur while taking this drug are usually mild and include nausea, vomiting, stomach pain, diarrhea, dizziness,and headache .

Commonly occurring side-effects are nausea, vomiting, gastro intestinal bleeding,melaena, peptic ulcer, pancreatitis, anxiety, drowsiness, dizziness, headache, hallucinations,excessive thirst, inability to concentrate, insomnia, malaise, fatigue, pruritus, urticaria, skin photosensitivity, Lyell's syndrome, Stevens-Johnson syndrome, flushing, bradycardia, hypertension, palpitations, chest pain, infertility in female, dyspnoea, asthma, pulmonary oedema, fever, injection site pain.

Toxicity

The rate of adverse effects increases with higher doses of ketorolac. The most frequently observed adverse effects in patients occurring with an incidence of greater than 10% include: abdominal pain, dyspepsia, nausea, and headaches. Most adverse effects associated with short term use are mild in nature, related to the gastrointestinal tract and nervous system, and occur in roughly 39% of patients. Common symptoms of ketorolac overdose include nausea, vomiting, epigastric pain, gastrointestinal bleeding, lethargy and drowsiness. More rare symptoms of overdose include acute renal failure, hypertension, respiratory depression, and coma.

Ketorolac is classified as Pregnancy Category C since there is a lack of evidence demonstrating safety in pregnant women. NSAIDs including ketorolac increase the risk of premature closure of the fetal ductus arteriosus in the 3rd trimester; therefore, beginning at 30 weeks gestation, pregnant women should avoid ketorolac.

Ketorolac has been shown to be excreted in breast milk, and although available data has not demonstrated any adverse effects in nursing infants, practitioners should proceed with caution when suggesting ketorolac for nursing mothers. The benefits should outweigh the risks and the mother should be counselled to monitor the infant closely and to contact the infant's healthcare provider should any adverse effects arise.

Women who are trying to conceive are not advised to take ketorolac since it's effect on prostaglandin synthesis may impair fertility.

Precaution

Gatifloxacin should be administered with caution in the presence of renal insufficiency.

Patients over the age of 65 years may be at a greater risk of experiencing adverse events than younger patients. Ketorolac tromethamine can cause gastro-intestinal irritation, ulcers or bleeding in patients with or without a history of previous symptoms. Bronchospasm may be precipitated in patients with a history of asthma. Since ketorolac tromethamine and its metabolites are excreted primarily by the kidney, patients with moderate to severe impairment of renal function (serum creatinine greater than 160 micromol/l) should not receive. Fluid retention and oedema have been reported with the use of Ketorolac tromethamine.

Interaction

Ketorolac tromethamine should not be used with other NSAIDs or in patients receiving aspirin because of the potential for additive side effects. Care should be taken when administering Ketorolac tromethamine with anti-coag ulants since co-administration may cause an enhanced anti-coagulant effect. Ketorolac tromethamine and other non-steroidal anti-inflammatory drugs can reduce the anti hypertensive effect of beta-blockers and may increase the risk of renal impairment when administered concurrently with ACE inhibitors, particularly in volume depleted patients. Caution is advised when methotrexate is administered concurrently, since some prostaglandin synthesis inhibiting drugs have been reported to reduce the clearance of methotrexate, and thus possibly enhance its toxicity. Probenecid should not be administered concurrently with ketorolac tromethamine because of increases in ketorolac plasma level and half-life.

Volume of Distribution

The apparent volume of distribution of ketorolac in healthy human subjects is 0.25 L/kg or less.

Elimination Route

Well absorbed from the gastrointestinal tract after oral administration with absolute bioavailability of gatifloxacin is 96%

Ketorolac is rapidly, and completely absorbed after oral administration with a bioavailability of 80% after oral administration. Cmax is attained 20-60 minutes after administration, and after intramuscular administration, the area under the plasma concentration-time curve (AUC) is proportional to the dose administered.

After intramuscular administration, ketorolac demonstrates a time to maximal plasma concentration (tmax) of approximately 45-50 minutes, and a tmax of 30-40 minutes after oral administration. The rate of absorption may be reduced by food; however, the extent of absorption remains unaffected.

Half Life

7-14 hours

Ketorolac tromethamine is administered as a racemic mixture, therefore the half-life of each enantiomer must be considered. The half life of the S-enantiomer is ~2.5 hours, while the half life of the R-enantiomer is ~5 hours. Based on this data, the S enantiomer is cleared about twice as fast as the R enantiomer.

Clearance

The plasma clearance of ketorolac is 0.021 to 0.037 L/h/kg. Further, studies have illustrated that clearance of oral, IM and IV doses of ketorolac are comparable which suggests linear kinetics. It should also be noted that clearance in children is about double the clearance found in adults.

Elimination Route

Ketorolac is primarily renally eliminated and approximately 92% of the dose can be recovered in the urine with 60% of this proportion recovered unchanged, and 40% recovered as metabolites. In addition 6% of a single dose is eliminated in the feces.

Pregnancy & Breastfeeding use

Pregnancy: Gatifloxacin should be used during pregnancy only if the potential benefit outweighs the potential risk to the fetus.

Lactation: It is not known whether Gatifloxacin is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when gatifloxacin is administered to a nursing woman.

Safety in human pregnancy has not been established. Ketorolac has been detected in human milk at low levels. Ketorolac is therefore contraindicated during pregnancy, labour or delivery, or in mothers who are breast feeding.

Contraindication

Gatifloxacin is contraindicated in patients with a history of hypersensitivity of Gatifloxacin, quinolone antimicrobial agents, or any other components of this product.

Ketorolac Tromethamine is contraindicated in patients with known hypersensitivity to NSAIDs and any of the components of Ketorolac Tromethamine. Moreover, the patient with the history of asthma, nasal polyp, angioedema, peptic ulcer and bleeding, bleeding disorders are contraindicated for this drug.

Special Warning

Renal Impaired patient:

• Creatinine Clearance 40 mL/min: 400 mg every day.
• Creatinine Clearance < 40 mL/min: 400 mg 200 mg every day.

Dialysis patients:

• Hemodialysis: 400 mg 200 mg every day.
• Continuous peritoneal dialysis: 400 mg 200 mg every day.

Pediatric use: The safety and effectiveness of Gatifloxacinacin in pediatric populations (<18 years of age) have not been established.

Acute Overdose

Gatifloxacin exhibits a low potential for acute toxicity in animal studies. In the event of acute oral overdose, the stomach should be emptied by inducing vomiting or by gastric lavage. The patient should be carefully observed (including ECG monitoring) and given symptomatic and supportive treatment. Adequate hydration should be maintained.

Symptoms: Abdominal pain, nausea, vomiting, hyperventilation, peptic ulceration, erosive gastritis and renal dysfunction.

Management: Symptomatic and supportive treatment. Consider gastric lavage or admin of activated charcoal within 1 hr of ingestion.

Storage Condition

Tablet & injection should be store in a cool & dry place, protect from light & moisture.

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