Cabergoline

Basic cabergoline information

• INN (international nonproprietary name): Cabergoline
• Brand names available in the United Kingdom: Dostinex; generic cabergoline tablets
• ATC code: G02CB03
• Forms and dosages: Tablets 0.5 mg
• Manufacturers in the United Kingdom: Pfizer (Dostinex) and generic manufacturers
• Registration status in the United Kingdom: Prescription-only medicine (POM)
• OTC / Rx classification: Prescription-only medicine (POM)

Everyday use and best practices

Taking cabergoline in the evening may help minimise side effects such as dizziness, which can be more bothersome during the day. Keeping to a scheduled routine, on the same day or days each week, helps maintain consistent levels of the medication. Missing doses should be avoided.

Taking with or without meals

Cabergoline can be taken with or without food. Taking it with a meal may help reduce nausea.

Safety priorities

There are specific groups who should avoid cabergoline or use it only with caution. These include individuals with:

• Uncontrolled hypertension
• A history of pulmonary, pericardial or retroperitoneal fibrotic disorders, or heart valve disease
• Known hypersensitivity to cabergoline or its components
• Severe liver impairment
• Pregnancy, unless clearly needed

It's crucial for individuals with these conditions to consult healthcare professionals before beginning treatment.

Activities to limit (driving, work safety)

Certain side effects associated with cabergoline can impair daily activities. Dizziness and drowsiness are commonly reported, especially during the initial phase of treatment. Patients are advised to exercise caution when driving or operating heavy machinery until they know how the drug affects them. If side effects become problematic, a discussion with a healthcare professional could lead to adjustments in therapy or supportive care.

Dosage and adjustments

For hyperprolactinaemia the usual starting dose is 0.5 mg per week, taken as a single dose or as two doses (for example on two days of the week). Depending on tolerance and response, the dose is increased gradually, with a typical maintenance dose of about 1 mg weekly. Careful monitoring during this period, including prolactin levels, helps to achieve the best outcome.

Special cases (elderly, comorbidities)

For special populations such as the elderly or those with renal or hepatic impairment, starting doses should be lower. Caution is advised in titrating up to ensure safety and comfort. The elderly, for example, may experience more susceptibility to side effects like orthostatic hypotension, necessitating a more conservative approach. Renal impairment does not generally require dosage changes, although severe cases should be carefully monitored.

What’s inside and how it works

Ingredients overview

Cabergoline is a dopamine agonist. The only active ingredient is cabergoline, and the tablets also contain inactive excipients, which can include lactose and magnesium stearate. Check the patient information leaflet of your brand if you have any allergies.

Mechanism basics explained simply

Cabergoline mimics the action of dopamine, a neurotransmitter in the brain. By activating dopamine receptors, it signals the pituitary gland to reduce prolactin secretion, which improves conditions caused by high prolactin levels, such as hyperprolactinaemia.

Main indications

Approved uses

Cabergoline is licensed in the UK for treating hyperprolactinaemic disorders, including prolactin-secreting pituitary adenomas (prolactinomas). It is a prescription-only medicine.

Off-label uses in UK clinics

In UK clinics, cabergoline is occasionally used off-label, for example in other conditions linked to raised prolactin or, under specialist care, in Parkinson’s disease. Such use is decided by the specialist for each patient.

Interaction warnings

Food interactions

It is advisable to limit alcohol, as it may heighten side effects like dizziness or nausea.

Drug conflicts

Be mindful of potential interactions when using cabergoline, including:

• Antipsychotics (e.g., clozapine, olanzapine) – may diminish the efficacy of cabergoline.
• Other dopamine agonists (e.g., bromocriptine) – could exacerbate side effects or enhance hypotensive effects.
• Blood pressure medications – increased risk of hypotension.
• Certain antiparkinsonian medications – may interact and alter therapeutic effects.

Ask a healthcare professional for a complete list of interactions. Suspected side effects can be reported through the Yellow Card scheme.

Alternative choices

For hyperprolactinaemia, several alternatives exist:

• Bromocriptine: another dopamine agonist, taken more often than cabergoline and with a higher incidence of gastrointestinal side effects.
• Quinagolide: Another dopamine agonist that may be considered, especially if cabergoline isn’t effective or tolerated.
• Medications tailored to underlying causes: If hyperprolactinaemia is secondary to other disorders, addressing the primary condition may yield better results.

The choice is made by the patient and prescriber together.

Regulation snapshot

Cabergoline is regulated in the UK by the Medicines and Healthcare products Regulatory Agency (MHRA). It is a prescription-only medicine (POM) and is not available over the counter. This reflects the potential side effects of cabergoline and the need for monitoring during treatment.

Patients should follow up regularly with their healthcare professional to monitor their dose and any side effects.

Frequently asked questions

Can I take cabergoline while pregnant?

Cabergoline is generally not recommended during pregnancy unless specifically indicated by a doctor. The potential risks need to be weighed against the benefits for each individual.

Will cabergoline affect my sex drive?

Cabergoline can have varied effects on libido. By lowering high prolactin levels it may improve sexual function in people whose symptoms are caused by raised prolactin.

Is cabergoline safe for long-term use?

Long-term use of cabergoline is possible under professional supervision. Regular monitoring (including heart checks for long-term, higher-dose treatment) is essential to manage any side effects, which can include dizziness or nausea.

Are there alternatives to cabergoline?

Yes, bromocriptine is an alternative. Cabergoline has a longer half-life, so it is taken less often, and it tends to cause fewer gastrointestinal side effects.

Guidelines for proper use

To optimise treatment with cabergoline, patients should adhere to the following recommendations:

• Dosage: Take exactly as prescribed by your healthcare provider, typically starting at 0.5 mg per week for hyperprolactinaemic disorders.
• Consistency: Try to take cabergoline at the same time on prescribed days to maintain even levels in your body.
• Monitoring: Regular check-ups and blood tests are crucial for assessing hormone levels and any side effects.
• Diet and lifestyle: Maintain a balanced diet and stay hydrated, as gastrointestinal side effects can be mitigated this way.
• Missed dose: If a dose is missed, take it as soon as remembered unless it's close to the next scheduled dose; in that case, skip it and continue the regular routine. Never double the dose.

Keeping a log of doses and side effects can aid adherence. Do not hesitate to contact your healthcare team with questions or concerns.