Matrifen

Fentanyl, the active ingredient in Matrifen, is an opioid analgesic presented as a transdermal patch for transdermal use. It treats severe chronic pain, cancer‑related pain and breakthrough pain in patients who need continuous opioid therapy.

GNH USA supplies Matrifen as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, oncology centres, pharmacies and clinics worldwide.

Fentanyl, an opioid analgesic, is indicated for conditions that require sustained opioid delivery.

- Severe chronic non‑cancer pain: provides continuous analgesia over several days. - Cancer‑related pain: maintains steady plasma levels for tumor‑associated pain. - Breakthrough pain management: used together with short‑acting opioids to control episodic pain spikes.

Fentanyl transdermal therapy can be associated with a range of adverse reactions.

Common Side Effects: - Nausea: mild to moderate upset stomach. - Constipation: reduced bowel movements. - Somnolence: increased sleepiness. - Dizziness: feeling light‑headed. - Application site erythema: redness where the patch is placed. - Pruritus: itching at the patch site.

Serious or Rare Side Effects: - Respiratory depression: dangerously slow breathing. - Severe hypotension: marked drop in blood pressure. - Cardiac arrhythmia: irregular heart rhythm. - Adrenal insufficiency: inadequate cortisol production. - Severe skin reactions: Stevens‑Johnson syndrome or necrosis. - Opioid dependence or withdrawal syndrome upon abrupt discontinuation.

When prescribing or dispensing Matrifen, several safety measures should be observed.

- Assess opioid tolerance: confirm the patient is opioid‑experienced before initiating therapy. - Rotate application site: change the skin area with each new patch to avoid irritation. - Monitor respiratory function: especially during the first 24 hours and after dose adjustments. - Avoid concurrent MAO inhibitors: risk of severe hypertension or serotonin syndrome. - Educate on disposal: used patches must be folded and placed in a sharps container. - Store at room temperature: keep in the original pouch, protect from moisture and direct heat.

Fentanyl may interact with other medicines, altering its safety or effectiveness.

Major Interactions (Avoid): - Other strong opioids: additive respiratory depression. - Monoamine oxidase inhibitors (MAOIs): risk of hypertensive crisis. - Central nervous system depressants (e.g., benzodiazepines): profound sedation and respiratory compromise.

Moderate Interactions (Monitor Closely): - CYP3A4 inhibitors (e.g., ketoconazole, erythromycin): increase fentanyl plasma levels. - Alcohol: enhances sedative effects and respiratory depression. - CYP3A4 inducers (e.g., rifampin, St. John’s wort): may reduce analgesic efficacy.