Riball
Brand names,
Riball
Analogs
Riball
Brand Names Mixture
Riball
Chemical_Formula
C5H4N4O
Riball
RX_link
http://www.rxlist.com/cgi/generic/allopur.htm
Riball
fda sheet
Riball
msds (material safety sheet)
Riball
Synthesis Reference
Robins, J. Am. Chem. So. 78, 784 (1956)
Riball
Molecular Weight
136.112 g/mol
Riball
Melting Point
350 oC
Riball
H2O Solubility
569 mg/L
Riball
State
Solid
Riball
LogP
-0.177
Riball
Dosage Forms
Tablet for oral administration (100mg, 200mg and 300mg); Injection
Riball
Indication
For the treatment of hyperuricemia associated with primary or secondary gout.
Riball
Pharmacology
Allopurinol, a structural analog of the natural purine base hypoxanthine, is used to prevent gout and renal calculi due to either uric acid or calcium oxalate and to treat uric acid nephropathy, hyperuricemia, and some solid tumors.
Riball
Absorption
Approximately 90% absorbed from the gastrointestinal tract.
Riball
side effects and Toxicity
LD50=214 mg/kg (in mice)
Riball
Patient Information
Patients should be informed of the following:
- 1. They should be cautioned to discontinue allopurinol and to consult their physician immediately at the
first sign of a skin rash, painful urination, blood in the urine, irritation of the eyes, or swelling of the lips
or mouth.
- 2. They should be reminded to continue drug therapy prescribed for gouty attacks since optimal benefit
of allopurinol may be delayed for two to six weeks.
- 3. They should be encouraged to increase fluid intake during therapy to prevent renal stones.
- 4. If a single dose of allopurinol is occasionally forgotten, there is no need to double the dose at the
next scheduled time.
- 5. There may be certain risks associated with the concomitant use of allopurinol and dicumarol,
sulfinpyrazone, mercaptopurine, azathioprine, ampicillin, amoxicillin and thiazide diuretics, and they should
follow the instructions of their physician.
- 6. Due to the occasional occurrence of drowsiness, patients should take precautions when engaging in
activities where alertness is mandatory.
- 7. Patients may wish to take allopurinol after meals to minimize gastric irritation.
Riball
Organisms Affected
Humans and other mammals