Interactions with supplements
Potassium
Look Up > Drugs > Sulfamethoxazole and Phenazopyridine
Sulfamethoxazole and Phenazopyridine
Pronunciation
Generic Available
Synonyms
Pharmacological Index
Use
Pregnancy Risk Factor
Contraindications
Adverse Reactions
Drug Interactions
Usual Dosage
Dietary Considerations
Mental Health: Effects on Mental Status
Mental Health: Effects on Psychiatric Treatment
Dental Health: Local Anesthetic/Vasoconstrictor Precautions
Dental Health: Effects on Dental Treatment
Patient Information
Nursing Implications
Dosage Forms

Pronunciation
(sul fa meth OKS a zole & fen az oh PEER i deen)

Generic Available

Yes


Synonyms
Phenazopyridine and Sulfamethoxazole

Pharmacological Index

Antibiotic, Sulfonamide Derivative


Use

Treatment of urinary tract infections complicated with pain


Pregnancy Risk Factor

B/D (at term)


Contraindications

Porphyria; hypersensitivity to any sulfa drug or any component


Adverse Reactions

Central nervous system: Confusion, depression, hallucinations, ataxia, seizures, fever, kernicterus in neonates

Dermatologic: Rash, erythema multiforme, Stevens-Johnson syndrome, epidermal necrolysis

Gastrointestinal: Nausea, vomiting, glossitis, stomatitis, diarrhea, pseudomembranous colitis

Hematologic: Thrombocytopenia, megaloblastic anemia, granulocytopenia, aplastic anemia, hemolysis (with G-6-PD deficiency)

Hepatic: Serum sickness, hepatitis

Renal & genitourinary: Interstitial nephritis


Drug Interactions

Warfarin, methotrexate


Usual Dosage

Oral: 4 tablets to start, then 2 tablets twice daily for up to 2 days, then switch to sulfamethoxazole only


Dietary Considerations

Should be administered 1 hour before or 2 hours after a meal on an empty stomach


Mental Health: Effects on Mental Status

May cause confusion, depression, and hallucinations; sulfonamides reported to cause restlessness, irritability, euphoria, disorientation, panic, and delusions


Mental Health: Effects on Psychiatric Treatment

Photosensitivity is common; use caution with concurrent psychotropics; may cause leukopenia; caution with clozapine and carbamazepine


Dental Health: Local Anesthetic/Vasoconstrictor Precautions

No information available to require special precautions


Dental Health: Effects on Dental Treatment

No effects or complications reported


Patient Information

See individual agents. Pregnancy/breast-feeding precautions: Inform prescriber if you are or intend to get pregnant. Consult prescriber if breast-feeding.


Nursing Implications

Urine may be discolored orange-red; when possible, obtain specimens for culture and sensitivity before the first dose; review allergy history


Dosage Forms

Tablet: Sulfamethoxazole 500 mg and phenazopyridine 100 mg


Copyright © 1978-2000 Lexi-Comp Inc. All Rights Reserved