Signifor treats Cushing's disease and acromegaly. May cause gallstones or high blood sugar.
Signifor is a prescription medication used to treat Cushing's disease in adults who can't have surgery or who have failed surgery. Signifor long-acting release (LAR) has been approved for acromegaly.
Signifor belongs to a group of drugs called somatostatin analogues. It works by regulating hormone levels in the body.
The medication comes in injectable form, and is usually administered twice daily for Cushing's disease and once-monthly for acromegaly.
Common side effects include diarrhea, nausea, and high blood sugar.
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Uses of Signifor
Signifor is a prescription medication used to treat:
- Cushing's disease in adults who can't have surgery or who have failed surgery.
Signifor long-acting release (LAR) has been approved for use in acromegaly, a potentially life-threatening endocrine disorder caused by elevated growth hormone levels.
This medication may be prescribed for other uses. Ask your doctor or pharmacist for more information.
Signifor Drug Class
Signifor is part of the drug class:
Side Effects of Signifor
Signifor may cause serious side effects, including:
- See “Drug Precautions".
- slow heart rate (bradycardia). Signifor can cause your heart to beat slower, which may cause you to feel weak, dizzy or even faint. People who have, or have had, heart problems are at higher risk for bradycardia.
- problems with the electrical system of your heart (QT interval prolongation) which can put you at risk for abnormal heart beats, dizziness and fainting spells that can be very serious. Call your doctor right away if you experience such spells.
- elevation of your liver tests. Your doctor should do blood tests to check your liver tests while you use Signifor.
- gallstones (cholelithiasis). Your doctor should do an ultrasound to check for gallstones before you start using Signifor and while you use it.
The most common side effects of Signifor include:
- high blood sugar
- abdominal pain
- diabetes mellitus
- injection site reactions
- common cold
- hair loss
- fluid retention
Tell your doctor if you have any side effect that bothers you or that does not go away.
These are not all the possible side effects of Signifor. For more information, ask your doctor or pharmacist.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1–800–FDA–1088.
Tell your doctor about all the medicines you take, including prescription and nonprescription medicines, vitamins, and herbal supplements. Taking Signifor with certain other medicines can affect each other and cause side effects.
Especially tell your doctor if you take:
- medicines to control your heart beat (anti-arrhythmics)
- medicines that can affect the electrical system of your heart (QT prolongation)
- medicines to control your blood pressure (such as beta-blockers or calcium channel blockers)
- medicines to control the electrolyte (such as potassium or magnesium) levels in your blood
- cyclosporine (Gengraf, Neoral, Restasis, Sandimmune)
- bromocriptine (Cycloset, Parlodel)
Ask your doctor for a list of these medicines, if you are not sure.
Know the medicines you take. Keep a list of them to show to your doctor and pharmacist when you get a new medicine.
Signifor can cause serious side effects, including:
- Low cortisol levels in your blood (hypocortisolism). Tell your doctor right away if you have any signs and symptoms of hypocortisolism. Signs and symptoms of hypocortisolism may include:
- loss of appetite
- low blood pressure
- low level of sodium in your blood
- low blood sugar
If you get hypocortisolism while taking Signifor, your doctor may change your dose or ask you to stop taking it.
- High blood sugar (hyperglycemia). Your doctor should check your blood sugar level before you start taking Signifor and while you take it. Signs and symptoms of hyperglycemia may include:
- excessive thirst
- high urine output
- increased appetite with weight loss
If you get hyperglycemia while taking Signifor, your doctor may give you another medicine to take to lower your blood sugar. Your doctor may also change your dose of Signifor or ask you to stop taking it.
Signifor Food Interactions
Medicines can interact with certain foods. In some cases, this may be harmful and your doctor may advise you to avoid certain foods. In the case of Signifor there are no specific foods that you must exclude from your diet when receiving Signifor.
Before you take Signifor, tell your doctor if you:
- have or have had high blood sugar (hyperglycemia)
- have diabetes
- have or have had heart problems
- have a history of low levels of potassium or magnesium in your blood
- have or have had liver problems
- have or have had gallstones
- have any other medical conditions
- are pregnant or plan to become pregnant. It is not known if Signifor will harm your unborn baby.
- are breastfeeding or plan to breastfeed. It is not known if Signifor passes into your breast milk. You and your doctor should decide if you will take Signifor or breastfeed. You should not do both.
Tell your doctor about all the medicines you take, including prescription and nonprescription medicines, vitamins, and herbal supplements.
Signifor and Pregnancy
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if Signifor will harm your unborn baby.
Signifor and Lactation
Tell your doctor if you are breastfeeding or plan to breastfeed. It is not known if Signifor passes into breast milk. You and your doctor should decide if you will take Signifor or breastfeed. The importance of Signifor to the mother should be determined in any decision to stop or continue using Signifor.
Signifor Usage for Cushing's Disease:
- Use Signifor exactly as your doctor tells you to.
- Your doctor may change your dose if needed.
- Before you use Signifor for the first time, your doctor should do a blood test to check your blood sugar levels and your liver tests.
- Before you use Signifor for the first time, your doctor should do a test to check your heart (electrocardiogram) and your gallbladder (ultrasound).
- Signifor should be clear and colorless. Before you inject your dose, check to make sure that Signifor is clear and colorless, and does not have any clumps or particles in it.
- Signifor is given as an injection into the fat just under your skin (subcutaneous injection).
- Do not inject Signifor into skin that is red or irritated.
- The recommended injection sites for Signifor are the top of your thigh or stomach area (abdomen).
- Change (rotate) your injection site with each dose. Do not inject Signifor into the exact same spot for each injection.
- Your doctor should show you how to prepare and give your dose of Signifor before you use it for the first time.
- You should not inject Signifor until your doctor has shown you how to use it the right way.
Signifor LAR for Acromegaly:
- Your healthcare provider will inject Signifor once a month into your buttock muscle.
- Keep all appointments.
- If you must miss a regularly scheduled appointment for an injection, reschedule as soon as possible.
For Cushing's Disease:
The recommended dosage range of Signifor is 0.3 to 0.9 mg by subcutaneous injection (just under the skin) twice a day.
The recommended starting dose is either 0.6 mg or 0.9 mg twice a day.
Injectable Long-Acting Release (LAR) form for Acromegaly:
The recommended dose for acromegaly is 40 mg administered by intramuscular injection once every 4 weeks (every 28 days). The dose may be increased to a maximum of 60 mg for patients who have not normalized growth hormone (GH) and/or age and sex adjusted insulin-like growth factor-1 (IGF-1) levels after 3 months of treatment with Signifor LAR at 40 mg and who tolerate this dose.
If you take too much Signifor, tell your doctor right away or get emergency treatment.
- Store Signifor at 68°F to 77°F (20°C to 25°C).
- Keep Signifor out of the light.
- Keep Signifor and all medicines out of the reach of children.