Palladone (Hydromorphone Hydrochloride)

Hydromorphone hydrochloride is an opioid analgesic that acts on the central nervous system to relieve pain.

• Acute postoperative pain: provides strong analgesia during the immediate recovery period.
• Cancer‑related pain: helps control persistent pain associated with malignant disease.
• Severe chronic non‑cancer pain: offers relief when other opioids or non‑opioid analgesics are insufficient.

• Hydromorphone hydrochloride binds with high affinity to the mu‑opioid receptors in the central nervous system. Activation of these receptors inhibits the release of excitatory neurotransmitters, reduces neuronal excitability, and modifies pain perception pathways, resulting in potent analgesic effects.

Hydromorphone hydrochloride may cause a range of adverse reactions, varying in frequency and severity.

Common Side Effects

• Constipation: reduced gastrointestinal motility.
• Nausea: mild to moderate queasiness.
• Drowsiness: increased sleepiness or sedation.
• Dry mouth: decreased salivary flow.
• Sweating: excessive perspiration.
• Dizziness: light‑headed sensation.

Serious or Rare Side Effects

• Respiratory depression: slowed or shallow breathing.
• Severe hypotension: marked drop in blood pressure.
• Allergic reactions: rash, itching, or anaphylaxis.
• Dependence or addiction: potential for misuse with prolonged use.
• Seizures: rare neurologic events.
• Urinary retention: difficulty emptying the bladder.

When prescribing hydromorphone hydrochloride, clinicians should consider several safety measures.

• Assess pain severity: confirm that opioid therapy is appropriate.
• Evaluate patient history: screen for respiratory disorders, substance misuse, or head injury.
• Monitor for sedation: watch for excessive drowsiness or impaired cognition.
• Adjust dose cautiously: titrate based on response and tolerability.
• Educate on constipation: advise prophylactic laxatives and fluid intake.
• Store at below 25°C: keep in the original container, protect from moisture and direct sunlight.

Hydromorphone hydrochloride can interact with other medications, altering its efficacy or safety profile.

Major Interactions (Avoid)

• Benzodiazepines: combined use can cause profound respiratory depression.
• CNS depressants: additive sedation and lowered consciousness.
• MAO inhibitors: may precipitate hypertensive crisis or serotonin syndrome.

Moderate Interactions (Monitor Closely)

• Anticholinergics: may worsen constipation.
• CYP3A4 inhibitors (e.g., ketoconazole): increase hydromorphone plasma levels.
• CYP3A4 inducers (e.g., rifampicin): reduce analgesic effect.