Antiinflammatory and Antigout Drugs Flashcards
Allopurinol
Functional Classification
Antigout drug, antihyperuricemic
Allopurinol
Mechanism of Action
Inhibits the enzyme xanthine oxidase, reducing uric acid synthesis
Allopurinol
Uses
Chronic gout, hyperuricemia associated with malignancies, recurrent calcium oxalate, calculi, uric acid calculi
Allopurinol
Contraindications
Hypersensitivity
Allopurinol
Side Effects
CNS: Headache, drowsiness, neuritis, paresthesia
EENT: retinopathy, cataracts, epistaxis
GI: Nausea, Vomiting, Anorexia, Malaise, metallic taste, cramps, peptic ulcer, diarrhea, stomatitis
HEMA: AGRANULOCYTOSIS, THROMBOCYTOPENIA, APLASTIC ANEMIA, PANCYTOPENIA, LEUKOPENIA, BONE MARROW SUPPRESSION, EOSINOPHILIA
INTEG: fever, chills, dermatitis, pruritus, purpura, erythema, ecchymosis, alopecia, rash, STEVENS-JOHNSON SYNDROME
MISC: myopathy, arthralgia, hepatomegaly, CHOLESTATIC JAUNDICE, RENAL FAILURE, EXFOLIATIVE DERMATITIS
Allopurinol
Nursing Considerations
ASSESS:
- FOR GOUT: joint pain, swelling; may use with NSAIDs for acute gouty attacks; uric acid levels q2wk; uric acid levels should be </=6mg/dl
- CBC, AST, BUN, creatinine before starting treatment, periodically
- I&O ratio; increase fluids to 2L/day to prevent stone formation and toxicity
- For rash, hypersensitivity reactions, discontinue allopurinol
Aspirin
Functional Classification
Nonopioid Analgesic, Nonsteroidal Antiinflammatory, Antipyretic
Aspirin
Chemical Classification
Salicylate
Aspirin
Mechanism of Action
Blocks pain impulses in CNS, reduces inflammation by inhibition of prostaglandin synthesis; antipyretic action results from vasodilation of peripheral vessels; decreases platelet aggregation
Aspirin
Uses
Mild to moderate pain or fever including RA, osteoarthritis, thromboemolic disorders; TIAs, rheumatic fever, post MI, prophylaxis of MI, ischemic stroke, angina, acute MI
Aspirin
Contraindications
Pregnancy (D) 3rd trimester, breastfeeding, children <12yr, children with flulike symptoms, hypersensitivity to salicylates, tartrazine (FDC yellow dye #5), GI bleeding, bleeding disorders, vit K deficiency, peptic ulcer, acute bronchospasm, agranulocytosis, increased intracranial pressure, intracranial bleeding, nasal polyps, urticaria
Aspirin
Side Effects
CNS: stimulation, drowsiness, dizziness, confusion, SEIZURES, headache, flushing, hallucinations, COMA
CV: rapid pulse, pulmonary edema
EENT: tinnitus, hearing loss
ENDO: hypoglycemia, hyponatremia, hypokalemia
GI: Nausea, Vomiting, GI BLEEDING, diarrhea, heartburn, anorexia, HEPATITIS
HEMA: THROMBOCYTOPENIA, AGRANULOCYTOSIS, LEUKOPENIA, NEUTROPENIA, HEMOLYTIC ANEMIA, increased PT, aPTT, bleeding
INTEG: Rash, urticaria, bruising
RESP: wheezing, hyperpnea
SYST: REYE’S SYNDROME (CHILDREN), ANAPHYLAXIS, LARYNGEAL EDEMA
Aspirin
Nursing Considerations
ASSESS:
- PAIN: character, location, intensity; ROM before and 1hr after administration
- FEVER: temp before and 1hr after administration
- Hepatic studies: AST, ALT, bilirubin, creatinine if patient is receiving long-term therapy
- Renal studies: BUN, urine creatinine; I&O ratio; decreasing output may indicate renal failure (long-term therapy)
- Blood studies: CBC, Hct, Hgb, PT if patient is receiving long-term therapy
- HEPATOTOXICITY: dark urine, clay-colored stools, yellowing of skin, sclera, itching, abdominal pain, fever, diarrhea if patient is receiving long-term therapy
- ALLERGIC REACTIONS: rash, urticaria; if these occur, product may have to be discontinued; patients with asthma, nasal polyps, allergies: severe allergic reaction may occur
- OTOTOXICITY: tinnitus, ringing, roaring in ears; audiometric testing needed before, after long-term therapy
- SALICYLATE LEVEL: therapeutic level 150-300mcg/ml for chronic inflammation
- Edema in feet, ankles, legs
- Product history; many product interactions
Aspirin
Overdose Treatment
Lavage, activated charcoal, monitor electrolytes, VS
Celecoxib (Celebrex)
Functional Classification
Nonsteroidal antiinflammatory, antirheumatic
Celecoxib (Celebrex)
Chemical Classification
COX-2 inhibitor
Celecoxib (Celebrex)
Mechanism of Action
Inhibits prostaglandin synthesis by selectively inhibiting cyclooxygenase-2 (COX-2), an enzyme needed for biosynthesis