There is minimal systemic absorption with topically applied imidazoline sympathomimetics such as xylometazoline, however, this product should be used with caution in patients suffering coronary artery disease, hypertension, hyperthyroidism or diabetes mellitus. Patients with long QT syndrome treated with xylometazoline may be at increased risk of serious ventricular arrhythmias.
This medicine is intended for short-term use only.
Repeated and/or prolonged administration can cause appreciable systemic exposure to the active substance and increases the risk of side effects.
Tachyphylaxis – a rapidly diminishing response to the drug after a few doses.
Using more of this product and/or using it for longer than recommended may also lead to reduced effect of a dose (due to repetitive drug exposure) and rebound congestion (see section 4.8).
Prolonged or excessive use may result in reactive hyperaemia, chronic swelling of the nasal mucosa known as rhinitis medicamentosa, and atrophy of the nasal mucosa. Increasing the dose and/or frequency of xylometazoline spray at onset of rebound congestion and/or rhinitis medicamentosa, will worsen the nasal congestion. Patients must stop treatment rather than increasing the dose or prolonging the treatment. It is necessary to ensure that the treatment period does not exceed 5 days of continuous use. Alternative treatment may be required if nasal congestion persists beyond the recommended treatment period (see section 4.8).
This medicine contains 1.96 mg benzalkonium chloride in each 10 ml, and 2.94 mg benzalkonium chloride in each 15 ml, which is equivalent to 0.196 mg/ml of product. Benzalkonium chloride may cause irritation or swelling inside the nose, especially if used for a long time. Long-term use may cause oedema of the nasal mucosa.
Labelling (outer pack):
The label will state (To be displayed prominently on the front of the outer pack):
- 'For 5 days use only'
The label will also state:
- 'Leave at least 8 hours between doses'
- 'For short-term use only'
- 'Do not use for more than 5 days in a row. Do not use more medicine than the label tells you to. If your symptoms worsen or you do not feel better after 5 days, stop treatment and seek medical advice.'