What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.

Norprolac (Quinagolide)


Norprolac (Quinagolide)

Prescription Required


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  • Product Details


    If you experience hyperprolactinemia, then your doctor may prescribe Norprolac. Hyperprolactinemia is characterized by elevated levels of prolactin hormone in the blood. Hyperprolactinemia can cause various symptoms, including irregular menstrual periods, infertility, and breast milk production in non-pregnant women.

    Norprolac contains quinagolide, a dopamine agonist that works by binding to dopamine receptors in the brain, reducing the production and release of prolactin. By normalizing prolactin levels, Norprolac helps alleviate the associated symptoms.

    Fact Table




    US DailyMed


    4 %

    Legal status


    Chemical Name


    Elimination half-life

    11.5 hours

    Dosage (Strength)



    Consult Doctor



    Protein binding


    PubChem CID



    No Data Available


    No Data Available

    ATC code






    Routes of administration



    The starting dosage of quinagolide is 0.025 mg once daily for three days before increasing it to 0.05 mg once daily for three days.

    Starting week two, increase the dosage to 0.075 mg once daily. The usual dosage range is 0.075-0.15 mg daily. The maximum dosage is 0.9 mg daily.


    The active ingredient in norprolac is quinagolide.


    Common drug-drug interactions can include

    • Alcohol
    • Antipsychotic Agents
    • Blood Pressure Lowering Agents
    • Bromopride
    • Metoclopramide
    • Pipamperone
    • Sulpiride


    Tell your doctor if you have a history of liver or kidney problems, heart disease, or a history of fibrotic disorders.

    Norprolac can increase the risk of nausea and vomiting.

    Tell your doctor if you experience low blood pressure during treatment. Blood pressure should be frequently monitored.

    Tell your healthcare team if you suddenly develop the onset of impulse control disorders like pathological gambling, hypersexuality, or compulsive spending.

    The medication may cause dizziness or low blood pressure, so use caution when driving or operating machinery.

    Side Effects

    Common side effects may include:

    • Abdominal distress
    • Abdominal pain
    • Acute psychosis
    • Anorexia
    • Asthenia
    • Constipation
    • Decreased hematocrit
    • Decreased hemoglobin
    • Diarrhea
    • Dizziness
    • Drowsiness
    • Dyspepsia
    • Edema
    • Emotional lability
    • Eye disease
    • Fatigue
    • Flushing
    • Headache
    • Hypotension
    • Increased creatinine phosphokinase
    • Increased serum bilirubin
    • Increased serum potassium
    • Increased serum transaminases
    • Insomnia
    • Lack of concentration
    • Limb pain
    • Malaise
    • Mastalgia
    • Nausea
    • Nasal congestion
    • Palpitations
    • Sedated state
    • Syncope
    • Vomiting
    • Weight gain


    Norprolac [package insert]. Toronto, Ontario: Ferring Inc.; 2013.

    IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

    Product Code : 12835

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