Meldream Pr (Melatonin)

• Melatonin acts on melatonin receptors to support the regulation of circadian rhythms and is indicated for several sleep‑related conditions.
• Insomnia: may reduce the time needed to fall asleep and improve overall sleep quality in adults experiencing difficulty maintaining sleep.
• Sleep onset difficulties: can promote quicker transition from wakefulness to sleep, helping individuals who struggle to initiate sleep at night.
• Jet lag: supports realignment of the circadian rhythm after rapid east‑west travel, reducing daytime sleepiness and nighttime wakefulness.

• Melatonin binds to MT1 and MT2 receptors in the suprachiasmatic nucleus, mimicking the endogenous hormone's action. This activation synchronizes the circadian clock, lowers core body temperature, and facilitates the onset of sleep by modulating neuronal activity involved in the sleep‑wake cycle.

Melatonin is generally well tolerated, but some users experience adverse reactions.

Common Side Effects

• Headache: mild to moderate pain often occurring shortly after ingestion.
• Dizziness: transient sensation of light‑headedness.
• Daytime sleepiness: residual drowsiness affecting alertness.
• Nausea: mild gastrointestinal discomfort.
• Vivid dreams: occasional intense dreaming.

Serious or Rare Side Effects

• Allergic reactions: rash, swelling, or itching indicating hypersensitivity.
• Mood changes: depression or increased anxiety in susceptible individuals.
• Cardiovascular events: rare cases of abnormal heart rhythm or palpitations.

• When considering melatonin therapy, several safety aspects should be reviewed.
• Assess patient history: evaluate for hypersensitivity to melatonin or excipients.
• Consider age: use caution in children and elderly patients.
• Review concomitant medications: potential interactions with anticoagulants, sedatives, and hormonal contraceptives.
• Pregnancy and lactation: discuss potential risks with a healthcare professional before use.
• Avoid operating machinery: possible residual drowsiness may impair performance.
• Store at ambient temperature: keep in original container, protect from moisture and direct sunlight.

Melatonin may interact with other medicines; some combinations require avoidance while others need monitoring.

Major Interactions (Avoid)

• Anticoagulants (e.g., warfarin): may increase bleeding risk.
• Immunosuppressants (e.g., cyclosporine): may reduce melatonin efficacy.
• CYP1A2 inhibitors (e.g., fluvoxamine): can raise melatonin plasma levels.

Moderate Interactions (Monitor Closely)

• Sedatives (e.g., benzodiazepines): additive central nervous system depression.
• Oral contraceptives: may alter melatonin metabolism.
• Antihypertensives: possible enhanced hypotensive effect.