T ½ ß (h)
ß(h-1)
Area under curve (µg h/ml)
Total clearance (ml/h/kg)
Volume of distribution (lit.)
Peak Concentration (µg/ml)
Trough Concentration (µg/ml)
|
17.2 + 1.76
0.04 + 0.004
11.426 + 0.914
91.7 + 8.9
2.285 + 0.304
1.012 + 0.055
0.237 + 0.017 |
For conventional Amphotericin B peak and trough concentrations were 0.9 and 0.28 µg/ml.
Pharmacokinetics, after multiple dose administration of FUNGISOMETM i.v. in adults-
Peak Concentration (µg/ml)
Trough Concentration (µg/ml) |
1.731
0.487 |
INDICATIONS
FUNGISOME TM i.v. is indicated in disseminated and invasive systemic fungal infections and also in patients of leishmaniasis.
It has been found to be effective even in cases resistant to standard antifungal drugs and antileishmanial drugs.
PREPARATION FOR ADMINISTRATION
Read this section carefully and follow the instructions before administration of FUNGISOMETM i.v.
DILUTION OF FUNGISOMETM i.v.
Follow the instructions given in product insert.
DOSES & ADMINISTRATION
Follow the instructions given in product insert.
In Adults
Follow the instructions given in product insert.
In Neonates
Follow the instructions given in product insert.
In neonates hypersensitivity of Amphotericin B is not expected. However as an matter of abundant precaution it is advised to give test dose as per the schedule below-
The results of the studies done till now indicated the following dose schedule as mg/kg body wt/day in respective infections:
Candiduria
Candidemia
Disseminated candidiasis
Mucormycosis
Aspergillosis
Cryptococcal meningitis |
1 mg/kg/day for 3 weeks
1 mg/kg/day for 4 weeks
1 mg/kg/day for 6 weeks or longer
1 mg/kg/day for 6 weeks or longer
1 mg/kg/day for 6 weeks or longer
1 mg/kg/day for 6 weeks or longer |
The duration of treatment should be decided on the basis of clinical, radiological, histopathological and microbiological assessment. It is advisable to discontinue FUNGISOMETM i.v. treatment only after confirmation of clearance of infection as judged by histopathological and microbiological report.
SAFETY
FUNGISOMETM i.v. therapy has been administered for as long as 8.5 months (256 days) and maximum total dose of 11.23gms of Amphotericin B was administered without significant toxicity1 .
LEISHMANIASIS
After infection of Kala-Azar in the body, Leishmanial parasites (amastigote) are taken up by macrophages and liposomes are also taken up by macrophages thus both the drug and the parasites are present in the same cell for close encounter. There is passive targeting of the drug. This is why FUNGISOMETMi.v. the Liposomal Amphotericin B is the most effective formulation for the cure of Kala-Azar.
FUNGISOMETM i.v. has been used in the treatment of visceral leishmaniasis in a dose of 1mg/kg body wt/day for 21 days. Successful results have also been achieved with the dose of 2mg/kg body wt/day for 10 days or 3mg/kg body wt/day for 7 days. In difficult to treat cases, physician may recommend the treatment for longer duration.
PEDIATRIC PATIENTS
Pediatric patients of systemic fungal infections and visceral leishmaniasis have been treated successfully with doses comparable to adults on a per kilogram body weight basis without any significant adverse effect.
NEONATES
Candidemia in neonates has been treated with FUNGISOMETM i.v. It is essential to monitor serum levels of electrolytes and withhold FUNGISOMETM i.v. if serum electrolyte values are below normal range. Mortality has been reported due to electrolyte imbalance possibly related FUNGISOMETM i.v. If vomiting is induced by therapy, subsequent administration of FUNGISOMETM
i.v. is recommended on empty stomach to minimize chances of related aspiration.
GERIATRIC PATIENTS
Based on studies done till now, no specific dosage alteration or precautions are recommended.
RENAL AND LIVER DISEASES
Patients with high creatinine levels have been administered FUNGISOMETM i.v. If rise in creatinine is noted following FUNGISOMETM i.v. administration, dose can be reduced to 0.8 mg/kg body wt/day.
In patients with high bilirubin or liver enzymes (SGOT, SGPT) before or during FUNGISOMETM i.v. treatment, dose should be reduced to 0.8 mg/kg body wt/day.
Further dose alterations or discontinuation should be individualized.
PREGNANCY OR LACTATION
In view of the toxicity of Amphotericin B, use of FUNGISOMETM i.v. is best avoided, unless the benefits outweigh the risks.
CONTRAINDICATIONS
FUNGISOMETM i.v. is contraindicated in patients who have developed serious hypersensitivity reaction during previous administration of FUNGISOMETM i.v. or its lipid constituents. Relative contraindications to FUNGISOMETM i.v. include previous serious reaction to other forms of Amphotericin B (conventional Amphotericin B or other lipid formulations of Amphotericin B). Experience with such cases is limited.
One patient who developed bronchospasm after conventional Amphotericin B did not suffer bronchospasm with FUNGISOMETM i.v.
PRECAUTIONS & WARNING
In a comparative study FUNGISOMETM i.v. produced fewer and less severe adverse effects than conventional Amphotericin B. Specifically, adverse effects viz. fever, chills, headache, backache, drowsiness, thrombophlebitis, nausea, vomiting, chestpain, palpitation, apnea, bronchospasm that occur with conventional Amphotericin B have been noted with FUNGISOMETM i.v. also, but to a much lesser degree.
The problem of fever or rigor could be avoided to some extent by lowering the rate of infusion.
If any serious adverse effects are noted, the infusion should be stopped and the drug withdrawn.
Renal, hepatic, hematological parameters along with serum electrolytes levels should be monitored regularly during treatment. If any deterioration occurs in these parameters, administration of the drug should cease immediately. Subsequent dosage should be administered on the basis of above mentioned parameters.
Amphotericin B is known to be nephrotoxic. If the creatinine exceeds 2.5 mg%, dosage should be reduced or discontinued till renal function improves. Hypokalemia during FUNGISOMETM i.v. therapy should be treated appropriately.
In neonates, if fall in packed cell volume (PCV) occurs, it should be treated with transfusions.
Do not use FUNGISOMETM i.v. if there is any evidence of crystals, foreign material or foreign particle in the bottle.
DRUG INTERACTIONS
The use of FUNGISOMETM i.v. Indian liposomal formulation of Amphotericin B enables to overcome dose related nephrotoxicity of Amphotericin B, thus allowing concomitant use of nephrotoxic drugs and bone marrow suppressants with due precautions and on the advice of the treating physician.
Drug interactions due to possible hypokalemia with FUNGISOME TM i.v. must be borne in mind and hypokalemia appropriately managed
STORAGE
A. Unopened bottles of FUNGISOMETM i.v. must be stored refrigerated at 2-8°C.
B. Sonicated FUNGISOMETM i.v. may be stored for upto 24 hours at 2-8°C. If
not used within 24 hours of sonication, discard FUNGISOMETM i.v.
C. If stored after sonication, shake well before use.
D. Do not store partially used vial for future patient use.
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