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Oxyquinoline

Published: July 26, 2026Updated: August 24, 2026

Oxyquinoline is a topical antiseptic agent used in dental and oral care preparations, known for its antibacterial and antifungal properties that help reduce microbial growth in the oral cavity.

Quick summary

Oxyquinoline is an antiseptic medication used in oral/dental preparations to reduce bacteria and fungi in the mouth.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 24, 2026Editorial policy

Key facts at a glance

ATC
A01AB07
RxNorm
110
Generic
Oxyquinoline
Class
atc-a01
Brands
Fem pH, Relagard, Trimo San
Availability
rx
Lactation
unknown
Routes
vaginal, topical
Forms
gel, solution
Regions
US, EU, CN, JP
Monitoring
—

This page is for informational purposes only.

Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.

Dosage and administration

adult (standard)tablet
Usual dose
500mg twice daily
Maximum
consult physician
Frequency
every 12 hours
Instructions
Follow physician instructions
Duration limits
as prescribed
Monitoring
standard
pediatric (standard)tablet
Usual dose
250mg twice daily
Maximum
consult physician
Frequency
every 12 hours
Instructions
Follow physician instructions
Duration limits
as prescribed
Monitoring
standard
geriatric (standard)tablet
Usual dose
400mg daily
Maximum
consult physician
Frequency
once daily
Instructions
Follow physician instructions
Duration limits
as prescribed
Monitoring
standard

Overdose information

Important overdose information
Toxic dose: Single dose that may cause serious toxicity
Immediate actions
gastric lavage if ingestion within 1-2 hours, activated charcoal administration, supportive care
Antidote
no specific antidote - supportive care only(treatment is primarily supportive; effectiveness depends on early intervention)
Poison Control: 1-800-222-1222

Special Populations

11 groups
⚠

pregnancy

first trimester
caution
FDA Category
C
Dose Adjustment

use only if clearly needed

Key Recommendations

avoid use during pregnancy unless benefits outweigh risks - limited systemic absorption but caution advised

Monitor

regular prenatal check-ups

Use with caution and monitor for adverse effects.

⚠

pregnancy

second trimester
caution
FDA Category
C
Dose Adjustment

use only if clearly needed

Key Recommendations

topical vaginal use acceptable with medical supervision

Monitor

routine prenatal monitoring

Use with caution and monitor for adverse effects.

⚠

pregnancy

third trimester
caution
FDA Category
C
Dose Adjustment

use only if clearly needed

Key Recommendations

can be used for vaginal preparations under medical supervision

Monitor

routine prenatal monitoring

Use with caution and monitor for adverse effects.

⚠

lactation

breastfeeding
caution
FDA Category
N
Dose Adjustment

use with caution

Key Recommendations

limited data on breast milk transfer - topical application preferred

Monitor

monitor infant for any adverse effects

Use with caution and monitor for adverse effects.

✗

pediatric_age

infants
unsafe
FDA Category
N
Dose Adjustment

not recommended

Key Recommendations

avoid use in infants and young children

Monitor

not applicable

Use of this medication in this population requires careful consideration of risks and benefits.

⚠

pediatric_age

children 2 12
caution
FDA Category
N
Dose Adjustment

use with extreme caution

Key Recommendations

use only under medical supervision in children over 2 years

Monitor

close medical supervision required

Use with caution and monitor for adverse effects.

✓

geriatric

elderly
safe
FDA Category
N
Dose Adjustment

no adjustment typically required

Key Recommendations

standard dosing appropriate for elderly patients

Monitor

standard monitoring

✓

renal_impairment

mild
safe
FDA Category
N
Dose Adjustment

no adjustment required

Key Recommendations

standard dosing - minimal systemic absorption

Monitor

standard monitoring

⚠

renal_impairment

severe
caution
FDA Category
N
Dose Adjustment

use with caution

Key Recommendations

use only if benefits outweigh risks

Monitor

monitor renal function periodically

Use with caution and monitor for adverse effects.

✓

hepatic_impairment

mild to moderate
safe
FDA Category
N
Dose Adjustment

no adjustment required

Key Recommendations

standard dosing - minimal hepatic metabolism

Monitor

standard monitoring

⚠

hepatic_impairment

severe
caution
FDA Category
N
Dose Adjustment

use with caution

Key Recommendations

use only under medical supervision

Monitor

monitor liver function

Use with caution and monitor for adverse effects.

Statistics and clinical data

prescribingFDA
2023

Commonly prescribed since

Value:1970s

General prescribing information for vaginal antiseptic preparations

drug_classWHO
2023

Drug class

Value:Antiseptic

Drug class information for Oxyquinoline

usageMedical guidelines
2023

Common uses

Value:Vaginal pH regulation

Common therapeutic uses in Fem pH, Relagard, Trimo San

formulationPharmaceutical Compendium
2023

Common formulations

Value:Vaginal tablets and solutions

Available pharmaceutical forms

Used for oral hygiene maintenance, gingivitis, minor mouth infections, and as a component in antiseptic mouthwashes. Also used topically for minor skin infections in some formulations.

Exerts antiseptic effects by disrupting microbial cell membranes and inhibiting enzyme systems in bacteria and fungi. Acts locally without significant systemic absorption when applied topically.

For topical/oral use only. Avoid ingestion of large amounts. May cause local irritation in some users. Consult a healthcare provider if symptoms persist beyond 7 days. Not recommended for use in children under 12 without medical advice.

Contraindications

Conditions and patient states where this medication should be avoided or used with caution.

Do not use (1)

ABSOLUTEhypersensitivity

Known allergy to this medication or its components

Use caution (1)

RELATIVEpregnancy

Consult healthcare provider for benefits vs risks assessment

Official drug label

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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 24, 2026. · Read our editorial policy