Nefopam Hydrochloride Brown & Burk Uk (Nefopam Hydrochloride)

Nefopam Hydrochloride is employed to relieve pain conditions that involve central nociceptive pathways.

• Moderate acute pain: provides analgesia for short‑term severe pain episodes.
• Post‑operative pain: reduces pain following surgical procedures.
• Traumatic injury pain: helps control pain after physical injuries.

• Nefopam Hydrochloride exerts its analgesic effect by inhibiting the reuptake of the monoamines norepinephrine, serotonin and dopamine within the central nervous system. This increase in synaptic concentrations modulates pain transmission pathways and produces antispasmodic activity, resulting in reduced perception of pain without acting on opioid receptors. The drug does not bind to opioid receptors and therefore avoids typical opioid‑related tolerance.

Nefopam Hydrochloride may cause a range of adverse reactions, varying from mild to serious.

Common Side Effects

• Nausea: mild to moderate feeling of sickness.
• Dry mouth: reduced salivation causing throat discomfort.
• Sweating: increased perspiration without exertion.
• Dizziness: transient light‑headedness.
• Constipation: reduced bowel movements.
• Blurred vision: temporary visual disturbances.

Serious or Rare Side Effects

• Tachycardia: rapid heart rate that may require monitoring.
• Seizures: convulsive episodes, especially in predisposed individuals.
• Severe hypotension: marked drop in blood pressure.
• Allergic reactions: rash, itching, or anaphylaxis.
• Agranulocytosis: rare drop in white blood cells.

When prescribing Nefopam Hydrochloride, clinicians should consider several safety precautions to minimize risk.

• Assess renal function: adjust use in patients with severe renal impairment.
• Monitor hepatic function: use with caution in liver disease.
• Avoid in uncontrolled hypertension: drug may increase blood pressure.
• Use cautiously in seizure disorders: may lower seizure threshold.
• Pregnancy and lactation: safety not established; avoid unless benefit outweighs risk.
• Store at ambient temperature: keep in original packaging, protect from moisture and light.

Nefopam Hydrochloride can interact with other medicines, altering its efficacy or safety profile.

Major Interactions (Avoid)

• MAO inhibitors: risk of serotonin syndrome.
• SSRIs or SNRIs: combined use may precipitate serotonin toxicity.
• Tricyclic antidepressants: increased risk of cardiovascular side effects.

Moderate Interactions (Monitor Closely)

• Antihypertensive agents: may reduce blood‑pressure‑lowering effect.
• Anticholinergic drugs: additive dry‑mouth and constipation.
• CYP450 inhibitors: possible increase in nefopam plasma levels.