drug profile of piroxicam
TRANSCRIPT
DRUG PROFILE OF PIROXICAM
PRESENTED TO:Dr. Samreen Faisal
PRESENTED BY:Ahad Nawaz
Pharm-D 4th Prof
Contents• Introduction• Product Description• Chemistry of Drug• Pharmacokinetics• Clinical Pharmacology• Dosage Schedule• Precautions• Side Effects• Administration Guidelines• Drug-drug Interactions• Drug Food Interactions• Therapeutic Drug Monitoring• Toxicology• References
Introduction
• Generic Name: Piroxicam
• Drug Category: Prescribed
• National Essential Drug List: Present
• WHO Essential Drug List: Present
Product Product DescriptionDescription
FeldeneFeldene• Generic: Piroxicam
• Dosage form: Tab/Cap/Gel/Inj
• Available strength:
10- 20mg/0.5%w/w& 20mg/ml• Manufactured By: Pfizer
OricamOricam• Generic: Piroxicam
• Dosage form: Tab & Cap
• Available strength:10-20mg• Manufactured By: Axis Pharma
Diodex• Generic: Piroxicam
• Dosage form: Tab/Cap & Gel
• Available strength: 20mg/ 0.5% w/w• Manufactured by: Pearl Pharma
CHEMISTRY OF DRUGCHEMISTRY OF DRUGChemical class: Enolic acid derivativeChemical Nature: AcidicMolecular formula/weight: C15H13N3O4S / 331.35
Physical Properties: Off-white to yellow crystalline powder Melting Point is198° to 200°c
Pharmacokinetics
AbsorptionAbsorption
Piroxicam is absorbed completely after oral administration and undergoes enterohepatic circulation.
Peak concentrations in plasma occur within 3-5hours
Distribution• Bioavailability:Bioavailability:
65-90% 65-90%
• Protein Binding:Protein Binding:
99%99%
• Blood Brain Barrier:Blood Brain Barrier:
Not cross the BBBNot cross the BBB
• Secreted in Milk:Secreted in Milk:
YesYes
• Volume of Distribution:Volume of Distribution:
0.14L/kg0.14L/kg
EliminationHalf Life
Metabolism Active Metabolite
Route of Excretion
50h50h Metabolise in the Metabolise in the liver. The major liver. The major metabolic metabolic transformation is transformation is CYP-mediatedCYP-mediatedhydroxylation to hydroxylation to an inactive an inactive metabolite and metabolite and its glucuronide its glucuronide
conjugateconjugate..
YesYes Excreted Excreted through through Urine and Urine and FecesFeces
Clinical Clinical PharmacologyPharmacology
Pharmacological Class
NSAIDs
Therapeutic Class
Analgesic, Anti-inflammatory, Antipyretic
MOA It inhibits cyclooxygenase and blocked the synthesis of prostaglandins.
Contra-indications
Inflammatory bowel disease , Pregnancy, Hypersensitivity to drug
FDA Pregnancy Class
Pregnancy Category D
Dosage Dosage ScheduleSchedule
Rheumatoid Arthritis
• Route of Administration:
Oral / ParenteralOral / Parenteral
• Recommended Dose:
20mg Once daily20mg Once daily
• Duration of Therapy:
7 to 12 Days7 to 12 Days
Osteoarthritis
• Route of Administration:
Oral / ParenteralOral / Parenteral
• Recommended Dose:
20mg Once daily20mg Once daily
• Duration of Therapy:
7 to 12 Days7 to 12 Days
Ankylosing Spondylitis
• Route of Administration:
Oral / ParenteralOral / Parenteral
• Recommended Dose:
20mg Once daily20mg Once daily
• Duration of Therapy:
7 to 12 Days7 to 12 Days
Juvenile Rheumatoid Arthritis
• Route of Administration:
Oral / ParenteralOral / Parenteral• Recommended Dose:
5-15mg5-15mg Once daily according Once daily according
to body weight of the childto body weight of the child• Duration of Therapy:
5 to 8 Days5 to 8 Days
Side Effects GI disturbances including Discomfort, Nausea, Diarrhoea,
Heartburn, bleeding& Ulceration.
Rash, Dizziness, Tinnitus
Hepatic damage
Alveolitis, Pulmonary eosinophilia, Apnea
Dyspepsia, Increase bleeding time
StorageStorageKeep medicine out of the reach of
children.
Store in a dry place,
Protect from sunlight and
moisture
Store below 30°C
PrecautionsPrecautions• Piroxicam should be used with caution
in patients with coagulation defects &
• Patients on anticoagulant therapy.
• Discontinue drug if skin reaction occurs.
Administration Guidelines
• Give with milk, antacids, or food to
minimize GI upset.
Drug-Drug InteractionsDrug-Drug InteractionsInteracting Drug
Mechanism Outcome
Methorexate
Piroxicam have been competitively inhibit methotrexate accumulation in kidney slices.
Eenhance the toxicity of methotrexate
Diuretics (Thiazide & Furosemide )
Also Inhibits the renal prostaglandin synthesiswhich is responsible for netriuretic effect.
Reduce the netriuretic effect of diuretics
Warfarin It also inhibit the platelets aggregation .
Increase bleeding time
ACE inhibitors
Its have the maximum protein binding then ace inhibitors
Reduce the antihypertensive effect ace inhibitors
Drug-Food Drug-Food InteractionsInteractions
Piroxicam have not shown any
food interaction.
Therapeutic Drug Monitoring
• NSAIDs have the wide therapeutic index so due to this reason they don’t require therapeutic drug monitoring
ToxicologyToxic Dose Symptoms Treatment
60-80mg for 3 days
Lethargy, Drowsiness, Nausea, vomiting,Epigastric pain.Hypotension, Acute Renal failure, Respiratorydepression and Coma may occur
No specific antidotes
Emesis or activated charcoal or osmotic cathartic may be used to overcome the toxicity
REFERENCESREFERENCES Basic & Clinical Pharmacology_
Bertram_G._Katzung- 9th Edition Page 823
Goodman & Gillman's Manual of Pharmacology &
therapeutics-2008 Page-453
BNF 61st Edition Page-639
Clarke's Analysis of Drugs and Poisons 3rd Edition Page-521