VICKS FIRST DEFENCE NASAL SPRY

Indications

Approved Uses

Nasal congestion due to common cold, sinusitis, hay fever, and other upper respiratory allergies

Dosage & Administration

Maximum Dose

Adults and children 6 years and older: 2 to 3 sprays in each nostril not more often than every 10 to 12 hours. Do not exceed 2 doses in any 24-hour period. Do not use more than 3 to 5 days.

Dose Adjustment Notes

Limit use to a maximum of 3 consecutive days to avoid rebound congestion; use caution/seek medical advice in patients with hypertension/cardiovascular disease, hyperthyroidism, diabetes, or prostatic hypertrophy, and avoid use with/within 14 days of MAOIs.

Side Effects

Common Side Effects

Transient nasal burning/stinging, dryness/irritation, sneezing; increased nasal discharge can occur; rebound congestion (rhinitis medicamentosa) with use beyond 3 days.

Safety & Warnings

Warnings & Precautions

Do not use for more than 3 consecutive days; use with caution in hypertension/heart disease, hyperthyroidism, diabetes, and prostatic enlargement/urinary retention; avoid eye contact and do not share the spray.

Age Restriction

Children under 2 years: Do not use. Children 2 to under 6 years: Ask a doctor. Children 6 years and older: Use as directed.

Drug Interactions

Food Interaction

No restriction

Special Populations

Kidney Impairment

No adjustment needed

Storage & Patient Advice

Stopping the Medicine

Do not use for more than 3 consecutive days; stop if symptoms persist or rebound congestion occurs.

Overdose

Overdose (especially if swallowed or in children) may cause CNS depression or agitation, bradycardia or tachycardia, hypertension or hypotension, respiratory depression, and coma; seek urgent medical attention/poison control and provide supportive care.

Patient Counseling

Use only for short-term relief: max 2 doses/day and no more than 3 consecutive days (rebound congestion risk); blow nose before use and keep head upright with gentle inhalation; do not share the bottle; seek advice/avoid if using MAOIs or if you have uncontrolled hypertension/heart disease, hyperthyroidism, diabetes, or prostate enlargement; see a clinician if symptoms persist beyond 3 days or worsen.

Monitoring Requirements

No routine monitoring

Pharmacology

Mechanism of Action

Direct-acting alpha-adrenergic agonist (predominantly α1 with some α2 activity) causing vasoconstriction of nasal mucosal vessels, reducing edema and congestion.

Onset of Action

Within 5-10 minutes.

Duration of Effect

Up to 10-12 hours

Half-Life

Not well established for intranasal OTC use; reported systemic half-life values are limited/variable (often cited around ~5-8 hours when systemically absorbed).

Bioavailability

Primarily local effect with low systemic bioavailability when used as directed; systemic absorption can increase with excessive dosing, mucosal damage, or swallowing runoff.

Metabolism

Limited human data; some hepatic metabolism is expected after systemic absorption, but overall metabolism is not well characterized and a portion is likely excreted unchanged in urine.

Protein Binding

Unknown / not reliably established for intranasal oxymetazoline 0.05%

Product Information

Composition per Dose

Each spray: oxymetazoline hydrochloride 0.05% (0.5 mg/mL)

Generic Availability

Yes

OTC Alternatives

Saline nasal spray/irrigation; xylometazoline nasal spray; oral decongestants such as pseudoephedrine (where appropriate/available).

Symptom Target

Congestion

Sedating

No

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