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Caffeine

Published: July 26, 2026Updated: August 27, 2026

Caffeine (ATC-D11) refers to topical caffeine preparations used in dermatology, primarily for treating androgenetic alopecia (pattern hair loss) and certain skin conditions. It acts as a phosphodiesterase inhibitor and may help stimulate hair follicle activity when applied to the scalp. Dermatological caffeine formulations are typically available as solutions or foams for direct application to affected areas.

Quick summary

Topical caffeine is used in dermatology primarily for hair loss treatment and certain skin conditions, working by stimulating hair follicles when applied directly.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 27, 2026Editorial policy

Key facts at a glance

ATC
N06BC01
RxNorm
1886
Generic
Caffeine
Class
atc-d11
Brands
Pamprin Max Formula, Stanback Headache Powder Reformulated Jan 2011, Capacet, BC Arthritis, BC Original Formula, Arthriten Inflammatory Pain, Exaprin, Backaid IPF, Ascomp, Excedrin Mild Headache, Jet-Alert, Vanatol, Fioricet, Sed-Max, Panadol Extra
Availability
otc
Pregnancy
C
Lactation
caution
Half-life (h)
5
Onset (min)
45
Duration (h)
4
Routes
oral, rectal
Forms
tablet, capsule, powder, solution, suppository
Regions
United States, Canada, European Union, United Kingdom, Australia, Japan
Monitoring
heart rate, blood pressure, sleep quality

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: Approximately 10 grams of caffeine can cause serious toxicity or potentially fatal outcomes
Chronic overdose: Daily intake exceeding 400-600 mg may lead to chronic symptoms in sensitive individuals including anxiety, insomnia, and cardiovascular issues
Immediate actions
gastric lavage within 1-2 hours of ingestion, activated charcoal, supportive care, IV fluids, cardiac monitoring
Antidote
none(no specific antidote exists; treatment is supportive and symptomatic)
Poison Control: 1-800-222-1222

Special Populations

8 groups
⚠

pregnancy

general
caution
FDA Category
C
Dose Adjustment

limit to 200mg daily

Key Recommendations

limit caffeine intake to 200mg per day during pregnancy; avoid excessive consumption

Monitor

regular prenatal check-ups

Use with caution and monitor for adverse effects.

⚠

pregnancy

first trimester
caution
FDA Category
C
Dose Adjustment

minimize intake

Key Recommendations

reduce caffeine intake to minimum possible during first trimester

Monitor

standard prenatal monitoring

Use with caution and monitor for adverse effects.

⚠

lactation

breastfeeding
caution
FDA Category
N
Dose Adjustment

limit to 300mg daily

Key Recommendations

limit caffeine intake to 300mg per day while breastfeeding; avoid excessive consumption

Monitor

observe infant for irritability or sleep disturbances

Use with caution and monitor for adverse effects.

⚠

pediatric_age

children 12 and under
caution
FDA Category
N
Dose Adjustment

avoid or minimize

Key Recommendations

avoid caffeine-containing products in children; limit exposure from all sources

Monitor

monitor for anxiety, sleep disturbances, or cardiovascular effects

Use with caution and monitor for adverse effects.

⚠

geriatric

elderly
caution
FDA Category
N
Dose Adjustment

monitor response

Key Recommendations

use with caution in elderly patients; consider reduced sensitivity and potential cardiovascular effects

Monitor

monitor blood pressure and heart rate

Use with caution and monitor for adverse effects.

⚠

renal_impairment

mild to moderate
caution
FDA Category
N
Dose Adjustment

no specific adjustment needed for mild impairment

Key Recommendations

use with caution; caffeine is primarily metabolized by liver

Monitor

standard monitoring

Use with caution and monitor for adverse effects.

⚠

renal_impairment

severe
caution
FDA Category
N
Dose Adjustment

reduce frequency

Key Recommendations

reduce caffeine intake; consider longer intervals between doses

Monitor

monitor for accumulation and side effects

Use with caution and monitor for adverse effects.

⚠

hepatic_impairment

mild to moderate
caution
FDA Category
N
Dose Adjustment

use with caution

Key Recommendations

caffeine is metabolized by liver; use with caution in hepatic impairment

Monitor

monitor for prolonged half-life

Use with caution and monitor for adverse effects.

Statistics and clinical data

drug_classWHO
2023

Drug class

Value:CNS stimulant / Analgesic adjuvant

Caffeine is classified as a CNS stimulant and used as an analgesic adjuvant in combination products

usageMedical guidelines
2023

Common uses

Value:Pain relief enhancement in combination products

Caffeine used as adjuvant to enhance analgesic effects in headache and pain medications

pharmacokineticsFDA
2023

Elimination half-life

Value:5-6 hours

Average half-life in healthy adults

dosageFDA
2023

Typical dose in combination products

Value:65-100mg per dose

Standard caffeine content in OTC analgesic combination products

Topical caffeine preparations are primarily used for androgenetic alopecia (male and female pattern hair loss). It may also be found in some dermatological formulations for skin conditioning and certain scalp disorders.

Caffeine acts as a phosphodiesterase inhibitor, which may increase cyclic AMP levels in hair follicles, potentially extending the anagen (growth) phase and stimulating hair proliferation. Topical application allows direct delivery to the hair follicle.

Topical caffeine is generally well-tolerated when applied to the scalp. Avoid contact with eyes and mucous membranes. Oral caffeine (CNS stimulant) is a different formulation with different dosing, indications, and safety considerations. Consult a dermatologist for proper diagnosis and treatment of hair loss conditions.

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 27, 2026. · Read our editorial policy