Europe — EMA
Norprolac (Quinagolide)
GNH USA supplies Norprolac (Quinagolide), a dopamine agonist for hyperprolactinemia and prolactin‑secreting pituitary adenomas.
Request sourcing
What is Quinagolide?
Quinagolide, the active ingredient in Norprolac, is a dopamine agonist presented as an oral tablet for oral use. It treats hyperprolactinemia and prolactin‑secreting pituitary adenomas in adult patients.
GNH USA supplies Norprolac as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.
What is Quinagolide used for?
Quinagolide acts on the dopaminergic pathway to lower excess prolactin levels, making it useful in several endocrine conditions.
- Hyperprolactinemia: reduces serum prolactin and normalises menstrual cycles and sexual function. - Prolactin‑secreting pituitary adenomas: shrinks tumor size and alleviates associated symptoms. - Galactorrhea due to hyperprolactinemia: stops inappropriate breast milk production.
What are the side effects of Quinagolide?
Adverse reactions may vary in frequency and severity.
Common Side Effects: - Nausea: mild to moderate gastrointestinal upset. - Headache: transient tension‑type headaches. - Dizziness: occasional light‑headedness, especially on standing. - Fatigue: generalised tiredness during early therapy.
Serious or Rare Side Effects: - Valvular heart disease: rare but may present with murmurs. - Impulse control disorders: compulsive behaviours such as gambling. - Severe hypotension: marked blood pressure drop requiring medical attention.
What precautions apply to Quinagolide?
Before initiating therapy, consider the following safety measures.
- Pregnancy: avoid unless the potential benefit justifies the risk to the fetus. - Breastfeeding: not recommended as the drug may be excreted in milk. - Renal impairment: assess kidney function; dose adjustment may be required. - Cardiovascular disease: monitor blood pressure and cardiac status. - Drug interactions: review concomitant medications for potential conflicts. - Store at below 25°C: keep in the original packaging, protect from moisture and direct sunlight.
What does Quinagolide interact with?
Quinagolide may interact with several drug classes; awareness helps prevent adverse outcomes.
Major Interactions (Avoid): - Antipsychotics (e.g., haloperidol): antagonise dopamine receptors and diminish efficacy. - Ergot alkaloids: additive vasospasm risk leading to peripheral ischemia. - MAO inhibitors: potential for hypertensive crisis.
Moderate Interactions (Monitor Closely): - Antihypertensives: may cause additive hypotensive effects. - SSRIs: possible increase in serotonin syndrome risk. - Hormonal contraceptives: may alter prolactin dynamics and affect efficacy.



