Stilnox

What is Stilnox?

Stilnox is a prescription-only medication widely used for the short-term management of severe, disabling insomnia. It is designed to help patients fall asleep more rapidly and is generally reserved for situations where sleep disturbances cause extreme distress to the individual.

As a non-benzodiazepine sedative-hypnotic, commonly referred to as a 'Z-drug', it is chemically distinct from traditional sleep aids. While standard benzodiazepines bind non-selectively to various brain receptors, zolpidem has a high affinity for the specific alpha-1 subunit of GABA-A receptors, providing potent sedative effects with fewer muscle-relaxing or anxiety-reducing properties.

Generic Names:

• Zolpidem tartrate: The internationally recognized generic name for this sedative-hypnotic compound.

Global Brand Names:

This active ingredient is marketed under several brand names globally.

• Stilnox (思諾思): The primary Sanofi brand widely available in 10mg tablet form within Hong Kong.
• Zolnox: A generic alternative available in local Hong Kong pharmacies with a valid prescription.
• Ambien: A highly recognized brand name for zolpidem primarily distributed in the United States.

These names all refer to the same medication. It's important to note that while the active ingredient is the same, different countries may have different regulations and available medication formulations.

What is Stilnox used for?

Stilnox is used to relieve:

• Difficulties with sleep initiation
• Severe, disabling short-term insomnia

How do you use Stilnox?

Availability:

• Tablets

Dosage Information:

• Adults: 10mg or 5mg taken once daily immediately before bedtime.
• Women: Recommended starting dose of 5mg due to slower body clearance rates.
• Elderly and Debilitated Patients: Reduced dose of 5mg to minimize the risk of falls and cognitive impairment.

Suitability:

• Adults: Yes, for short-term severe insomnia.
• Elderly: Yes, with a reduced dose and extra caution.
• Infants and Children: No, not indicated for pediatric use.

Who cannot take Stilnox?

Allergies and unsuitability:

• Rare, but possible severe allergic reactions, including anaphylaxis.

Conditions where the drug should not be used:

• Severe hepatic insufficiency
• Acute or severe respiratory insufficiency
• Obstructive sleep apnea syndrome
• Myasthenia gravis
• History of complex sleep behaviors after taking zolpidem

Common side effects of Stilnox include drowsiness, dizziness, headache, gastrointestinal issues such as diarrhea or nausea, dry mouth, and muscle pain. Because it is a powerful central nervous system depressant, patients may experience next-day psychomotor impairment, particularly if the drug is taken with less than a full seven to eight hours of sleep remaining.

Severe adverse reactions require immediate medical attention and can include profound amnesia, hallucinations, and complex sleep behaviors like sleepwalking, sleep-driving, or preparing food while entirely unaware. Long-term use beyond a few weeks carries a high risk of physical and psychological dependence, and abrupt discontinuation may trigger rebound insomnia and withdrawal symptoms such as tremors and muscle cramps.

• Take immediately before bedtime and ensure you can stay in bed for a full 7 to 8 hours to reduce the risk of next-day impairment.
• Take on an empty stomach to ensure rapid onset, as food delays the medication's effect.
• Do not exceed four weeks of total use, including the tapering phase, to avoid psychological dependence.
• Discontinue use immediately and notify a healthcare provider if you experience complex sleep behaviors like sleepwalking.
• Avoid alcohol completely to prevent dangerous increases in sedation and respiratory depression.
• Check with a doctor before using alongside other CNS depressants, opioids, or benzodiazepines.
• Consult a healthcare provider if taking CYP3A4 inhibitors (like ketoconazole) or inducers (like rifampicin), as they alter the drug's effectiveness.

Storage information:

• Store at controlled room temperature below 30°C.
• Keep in a dry place protected from direct light.
• Keep strictly out of the reach and sight of children.

Handling instructions:

• Swallow the tablet whole with a glass of water.
• Do not crush or chew the tablet unless advised otherwise by a pharmacist or doctor.
• Return any unused or expired medication to a pharmacy or clinic for safe disposal.

Where is Stilnox available in Hong Kong?

In Hong Kong, Stilnox is strictly classified as a Prescription Only Medicine. This means you must present a valid doctor's prescription to legally purchase it.

It can be obtained at registered community pharmacies displaying the "Rx" logo, or dispensed directly from registered medical clinics and hospital pharmacies under a doctor's direction.