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This medicinal product is subject to additional monitoring. This will allow quick identification of new safety information.
The text only version may be available in large print, Braille or audio CD.
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The product code(s) for this leaflet is: PLGB 58141/0014.
Semglee 100 units/ml solution for injection in pre-filled pen
Semglee® 100 units/ml
solution for injection in pre-filled pen
insulin glARGine
▼This medicine is subject to additional monitoring. This will allow quick identification of new safety information. You can help by reporting any side effects you may get. See the end of section 4 for how to report side effects.
1. What Semglee is and what it is used for
2. What you need to know before you use Semglee
3. How to use Semglee
4. Possible side effects
5. How to store Semglee
6. Contents of the pack and other information
Semglee contains insulin glargine. This is a modified insulin, very similar to human insulin.
Semglee is used to treat diabetes mellitus in adults, adolescents and children aged 2 years and above.
Diabetes mellitus is a disease where your body does not produce enough insulin to control the level of blood sugar. Insulin glargine has a long and steady blood-sugar-lowering action.
Semglee in pre-filled pen is only suitable for injecting just under the skin (see also section 3). Speak to your doctor if you need to inject your insulin by another method.
Talk to your doctor, pharmacist or nurse before using Semglee.
Follow closely the instructions for posology, monitoring (blood and urine tests), diet and physical activity (physical work and exercise), injection technique as discussed with your doctor.
Skin changes at the injection site:
The injection site should be rotated to prevent skin changes such as lumps under the skin. The insulin may not work very well if you inject into a lumpy area (see How to use Semglee). Contact your doctor if you are currently injecting into a lumpy area before you start injecting in a different area. Your doctor may tell you to check your blood sugar more closely, and to adjust your insulin or your other antidiabetic medications dose.
If your blood sugar is too low (hypoglycaemia), follow the guidance for hypoglycaemia (see box at the end of this leaflet).
Travel
Before travelling consult your doctor. You may need to talk about
Illnesses and injuries
In the following situations, the management of your diabetes may require a lot of care (for example, adjustment to insulin dose, blood and urine tests):
In most cases you will need a doctor. Make sure that you contact a doctor early.
If you have type 1 diabetes (insulin dependent diabetes mellitus), do not stop your insulin and continue to get enough carbohydrates. Always tell people who are caring for you or treating you that you require insulin.
Insulin treatment can cause the body to produce antibodies to insulin (substances that act against insulin). However, only very rarely, this will require a change to your insulin dose.
Some patients with long-standing type 2 diabetes mellitus and heart disease or previous stroke who were treated with pioglitazone (oral anti-diabetic medicine used to treat type 2 diabetes mellitus) and insulin experienced the development of heart failure. Inform your doctor as soon as possible if you experience signs of heart failure such as unusual shortness of breath or rapid increase in weight or localised swelling (oedema).
There is no experience with the use of Semglee in children below the age of 2 years.
Some medicines cause changes in the blood sugar level (decrease, increase or both depending on the situation).
In each case, it may be necessary to adjust your insulin dose to avoid blood sugar levels that are either too low or too high. Be careful when you start or stop taking another medicine.
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines. Before taking a medicine ask your doctor if it can affect your blood sugar level and what action, if any, you need to take.
Medicines that may cause your blood sugar level to fall (hypoglycaemia) include:
Medicines that may cause your blood sugar level to rise (hyperglycaemia) include:
Your blood sugar level may either rise or fall if you take:
Pentamidine (used to treat some infections caused by parasites) may cause hypoglycaemia which may sometimes be followed by hyperglycaemia.
Beta-blockers like other sympatholytic medicines (such as clonidine, guanethidine, and reserpine) may weaken or suppress entirely the first warning symptoms which help you to recognise a hypoglycaemia.
If you are not sure whether you are taking one of those medicines ask your doctor or pharmacist.
Your blood sugar levels may either rise or fall if you drink alcohol.
Ask your doctor or pharmacist for advice before taking any medicine.
Inform your doctor if you are planning to become pregnant, or if you are already pregnant. Your insulin dose may need to be changed during pregnancy and after giving birth. Particularly careful control of your diabetes, and prevention of hypoglycaemia, is important for the health of your baby.
If you are breast-feeding consult your doctor as you may require adjustments in your insulin doses and your diet.
Your ability to concentrate or react may be reduced if:
Keep this possible problem in mind in all situations where you might put yourself and others at risk (such as driving a car or using machines). You should contact your doctor for advice on driving if:
This medicine contains less than 1 mmol (23 mg) sodium per dose, i.e. it is essentially 'sodium-free'.
Always use this medicine exactly as your doctor has told you. Check with your doctor or pharmacist if you are not sure.
Although Semglee contains the same active substance as insulin glargine 300 units/ml, these medicines are not interchangeable. The switch from one insulin therapy to another requires medical prescription, medical supervision and blood glucose monitoring. Please, consult your doctor for further information.
Based on your life-style and the results of your blood sugar (glucose) tests and your previous insulin usage, your doctor will
Semglee is a long-acting insulin. Your doctor may tell you to use it in combination with a short-acting insulin or with tablets used to treat high blood sugar levels.
Many factors may influence your blood sugar level. You should know these factors so that you are able to react correctly to changes in your blood sugar level and to prevent it from becoming too high or too low. See the box at the end of this leaflet for further information.
Semglee can be used in adolescents and children aged 2 years and above. Use this medicine exactly as your doctor has told you.
You need one injection of Semglee every day, at the same time of the day.
Semglee pen delivers insulin in increments of 1 unit up to a maximum single dose of 80 units.
Semglee is injected under the skin. Do NOT inject Semglee in a vein, since this will change its action and may cause hypoglycaemia.
Your doctor will show you in which area of the skin you should inject Semglee. With each injection, change the puncture site within the particular area of skin that you are using.
Semglee in pre-filled pen is only suitable for injecting just under the skin. Speak to your doctor if you need to inject your insulin by another method.
Read carefully the "Instructions for Use" included in this package leaflet. You must use the pen as described in these Instructions for Use.
A new needle must be attached before each use. Only use needles that are compatible with Semglee pen (see "Instructions for Use").
A safety test must be performed before each injection.
Look at the cartridge before you use the pen. Do not use Semglee if you notice particles in the solution. Only use Semglee if the solution is clear and colourless. Do not shake or mix it before use.
To prevent the possible transmission of disease, never share your pen with anyone else. This pen is only for your use.
Always use a new pen if you notice that your blood sugar control is unexpectedly getting worse. If you think you may have a problem with Semglee pen, consult your doctor, pharmacist or nurse.
Empty pens must not be re-filled and must be properly discarded.
Do not use Semglee pen if it is damaged or not working properly (due to mechanical defects), it has to be discarded and a new Semglee pen has to be used.
You must always check the insulin label before each injection to avoid mix-ups between Semglee and other insulins.
If you have injected too much Semglee, your blood sugar level may become too low (hypoglycaemia). Check your blood sugar frequently. In general, to prevent hypoglycaemia you must eat more food and monitor your blood sugar. For information on the treatment of hypoglycaemia, see box at the end of this leaflet.
If you have missed a dose of Semglee or if you have not injected enough insulin, your blood sugar level may become too high (hyperglycaemia). Check your blood sugar frequently. For information on the treatment of hyperglycaemia, see box at the end of this leaflet.
Do not take a double dose to make up for a forgotten dose.
This could lead to severe hyperglycaemia (very high blood sugar) and ketoacidosis (build-up of acid in the blood because the body is breaking down fat instead of sugar). Do not stop Semglee without speaking to a doctor, who will tell you what needs to be done.
If you have any further questions on the use of this medicine, ask your doctor, pharmacist or nurse.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
If you notice signs of your blood sugar being too low (hypoglycaemia), take action to increase your blood sugar level straight away (see the box at the end of this leaflet). Hypoglycaemia (low blood sugar) can be very serious and is very common with insulin treatment (may affect more than 1 in 10 people). Low blood sugar means that there is not enough sugar in your blood. If your blood sugar level falls too low you may pass out (become unconscious).
Serious hypoglycaemia may cause brain damage and may be life-threatening. For more information, see the box at the end of this leaflet.
Severe allergic reactions (rare, may affect up to 1 in 1,000 people) - the signs may include large-scale skin reactions (rash and itching all over the body), severe swelling of skin or mucous membranes (angiooedema), shortness of breath, a fall in blood pressure with rapid heart beat and sweating. Severe allergic reactions to insulins may become life-threatening. Tell a doctor straight away if you notice signs of severe allergic reaction.
If you inject insulin too often at the same place, the fatty tissue may either shrink (lipoatrophy; may affect up to 1 in 100 people) or thicken (lipohypertrophy; may affect up to 1 in 10 people). Lumps under the skin may also be caused by build-up of a protein called amyloid (cutaneous amyloidosis; how often this occurs is not known). The insulin may not work very well if you inject into a lumpy area. Change the injection site with each injection to help prevent these skin changes.
Common reported side effects (may affect up to 1 in 10 people)
The signs may include reddening, unusually intense pain when injecting, itching, hives, swelling or inflammation. This can spread around the injection site. Most minor reactions to insulins usually disappear in a few days to a few weeks.
Rare reported side effect (may affect up to 1 in 1,000 people)
A marked change (improvement or worsening) in your blood sugar control can disturb your vision temporarily. If you have proliferative retinopathy (an eye disease related to diabetes) severe hypoglycaemic attacks may cause temporary loss of vision.
In rare cases, insulin treatment may also cause temporary build-up of water in the body, with swelling in the calves and ankles.
Very rare reported side effects (may affect up to 1 in 10,000 people)
In very rare cases, dysgeusia (taste disorders) and myalgia (muscular pain) can occur.
In general, the side effects in children and adolescents of 18 years of age or less are similar to those seen in adults. Complaints of injection site reactions (injection site reaction, injection site pain) and skin reactions (rash, urticaria) are reported relatively more frequently in children and adolescents of 18 years of age or less than in adults.
There is no experience in children under 2 years.
If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via
United Kingdom
Or search for MHRA Yellow Card in the Google Play or Apple App Store.
By reporting side effects you can help provide more information on the safety of this medicine.
Keep this medicine out of the sight and reach of children.
Do not use this medicine after the expiry date which is stated on the carton and on the label of the pen after "EXP". The expiry date refers to the last day of that month.
Not in-use pens
Store in a refrigerator (2°C-8°C). Do not freeze or place next to the freezer compartment of your refrigerator or a freezer pack.
Keep the pre-filled pen in the outer carton in order to protect from light.
In-use pens
Pre-filled pens in use or carried as a spare may be stored for a maximum of 4 weeks not above 25°C and away from direct heat or direct light. Do not use it after this time period. The pen in use must not be stored in a refrigerator. The pen cap must be put back on the pen after each injection in order to protect from light.
Remove the needle after the injection and store the pen without the needle. Also, be sure to remove the needle before disposing of the pen. Needles must not be re-used.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
Semglee 100 units/ml solution for injection in a pre-filled pen is a clear colourless solution.
Each pen contains 3 ml of solution for injection (equivalent to 300 units).
Semglee is available in pack sizes of 1, 3, 5, 10 pens and in a multipack compromising of 2 cartons, each containing 5 pens.
Not all pack sizes may be marketed.
For any information about this medicine, please contact the local representative of the Marketing Authorisation Holder:
This leaflet was last revised in June 2024
Always carry some sugar (at least 20 grams) with you.
Carry some information with you to show you are diabetic.
If your blood sugar is too high (hyperglycaemia), you may not have injected enough insulin.
Why does hyperglycaemia occur?
Examples include:
Warning symptoms of hyperglycaemia
Thirst, increased need to urinate, tiredness, dry skin, reddening of the face, loss of appetite, low blood pressure, fast heart beat, and glucose and ketone bodies in urine. Stomach pain, fast and deep breathing, sleepiness or even loss of consciousness may be signs of a serious condition (ketoacidosis) resulting from lack of insulin.
What should you do if you experience hyperglycaemia?
Test your blood sugar level and your urine for ketones as soon as any of the above symptoms occur. Severe hyperglycaemia or ketoacidosis must always be treated by a doctor, normally in a hospital.
If your blood sugar level falls too much you may become unconscious. Serious hypoglycaemia may cause a heart attack or brain damage and may be life-threatening. You normally should be able to recognise when your blood sugar is falling too much so that you can take the right actions.
Why does hypoglycaemia occur?
Examples include:
Hypoglycaemia is also more likely to occur if
Warning symptoms of hypoglycaemia
Examples of symptoms that tell you that your blood sugar level is falling too much or too fast:
sweating, clammy skin, anxiety, fast heart beat, high blood pressure, palpitations and irregular heartbeat. These symptoms often develop before the symptoms of a low sugar level in the brain.
Examples of symptoms that indicate a low sugar level in the brain: headaches, intense hunger, nausea, vomiting, tiredness, sleepiness, sleep disturbances, restlessness, aggressive behaviour, lapses in concentration, impaired reactions, depression, confusion, speech disturbances (sometimes total loss of speech), visual disorders, trembling, paralysis, tingling sensations (paraesthesia), numbness and tingling sensations in the area of the mouth, dizziness, loss of self-control, inability to look after yourself, convulsions, loss of consciousness.
The first symptoms which alert you to hypoglycaemia ("warning symptoms") may change, be weaker or may be missing altogether if
In such a case, you may develop severe hypoglycaemia (and even faint) before you are aware of the problem.
Be familiar with your warning symptoms. If necessary, more frequent blood sugar testing can help to identify mild hypoglycaemic episodes that may otherwise be overlooked. If you are not confident about recognising your warning symptoms, avoid situations (such as driving a car) in which you or others would be put at risk by hypoglycaemia.
What should you do if you experience hypoglycaemia?
1. Do not inject insulin. Immediately take about 10 to 20 g sugar, such as glucose, sugar cubes or a sugar-sweetened beverage. Caution: Artificial sweeteners and foods with artificial sweeteners (such as diet drinks) are of no help in treating hypoglycaemia.
2. Then eat something that has a long-acting effect in raising your blood sugar (such as bread or pasta). Your doctor or nurse should have discussed this with you previously.
The recovery of hypoglycaemia may be delayed because Semglee has a long action.
3. If the hypoglycaemia comes back again take another 10 to 20 g sugar.
4. Speak to a doctor immediately if you are not able to control the hypoglycaemia or if it recurs.
Tell your relatives, friends and close colleagues the following:
If you are not able to swallow or if you are unconscious, you will require an injection of glucose or glucagon (a medicine which increases blood sugar). These injections are justified even if it is not certain that you have hypoglycaemia.
It is advisable to test your blood sugar immediately after taking glucose to check that you really have hypoglycaemia.