What is a Patient Information Leaflet and why is it useful?
The Patient Information Leaflet (PIL) is the leaflet included in the pack with a medicine. It is written for patients and gives information about taking or using a medicine. It is possible that the leaflet in your medicine pack may differ from this version because it may have been updated since your medicine was packaged.
Below is a text only representation of the Patient Information Leaflet. The original leaflet can be viewed using the link above.
The text only version may be available in large print, Braille or audio CD. For further information call emc accessibility on 0800 198 5000. The product code(s) for this leaflet is: PL 11243/0023.
Amfexa 10mg and 20mg Tablets
PACKAGE LEAFLET: INFORMATION FOR THE PATIENT
Amfexa 10 mg/20 mg Tablets
Read all of this leaflet carefully before your child starts taking this medicine because it contains important information for you.
- Keep this leaflet. You may need to read it again.
- If you have any further questions, ask your doctor or pharmacist.
- This medicine has been prescribed for your child only. Do not pass it on to others. It may harm them, even if their signs of illness are the same.
- If your child gets any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.
What is in this leaflet:
1 What Amfexa Tablets is and what it is used for
2 What you need to know before you use Amfexa Tablets
3 How to use Amfexa Tablets
4 Possible side effects
5 How to store Amfexa Tablets
6 Contents of the pack and other information
1 WHAT AMFEXA TABLETS IS AND WHAT IT IS USED FOR
What Amfexa Tablets is
Amfexa Tablets contain the active substance dexamfetamine sulfate.
Amfexa Tablets is a psychostimulant. It improves activity in parts of the brain. This medicine can help to improve attention span, concentration, and reduce impulsive behaviour.
What it is used for
Amfexa Tablets is used to treat attention-deficit/hyperactivity disorder (ADHD).
- it is used in children and adolescents aged 6-17 years.
- it is not indicated in all children with ADHD.
- it is used only after when another medicine called methylphenidate was not sufficiently effective.
- It should be used as part of a treatment programme which typically includes psychological, educational and social measures.
Amfexa Tablets treatment must only be initiated by, and used under the supervision of a specialist in childhood or adolescent behavioural disorders.
You must talk to a doctor if your child does not feel better or if they feel worse after a month. The doctor may decide that a different treatment is needed.
2 WHAT YOU NEED TO KNOW BEFORE YOU USE AMFEXA TABLETS
Do not use Amfexa Tablets if your child:
- is allergic (hypersensitive) to dexamfetamine or other amfetamine compounds or any of the other ingredients of Amfexa Tablets (listed in section 6)
- has a thyroid problem
- has increased pressure in the eyes (glaucoma)
- has a tumour of the adrenal gland (phaeochromocytoma)
- has an eating problem, does not feel hungry or does not want to eat (e.g. anorexia nervosa)
- has very high blood pressure or narrowing of the blood vessels, which can cause pain in the arms and legs
- has advanced arteriosclerosis
- has ever had heart problems - such as a heart attack, uneven heartbeat, pain and discomfort in the chest, heart failure, heart disease, or was born with a heart problem
- has had a problem with the blood vessels in the brain - such as a stroke, swelling and weakening of part of a blood vessel (aneurysm), narrow or blocked blood vessels, or inflammation of the blood vessels (vasculitis)
- has mental health problems such as:
- a psychopathic or borderline personality disorder
- abnormal thoughts or visions or schizophrenia
- signs of a severe mood disorder like:
- suicidal feelings
- severe depression
- is currently taking or has taken within the last 14 days an antidepressant (known as a monoamine oxidase inhibitor) – see the ‘Other medicines and Amfexa Tablets’ section below
- has ever abused alcohol, prescription medicines, or street drugs
- or anyone in your family has Tourette’s syndrome or other motor or verbal tics
- has hard-to-control, repeated twitching of any parts of the body or repeats sounds and words
- has porphyria.
Do not use this medicine if any of the above applies to your child. If you are not sure, talk to your doctor or pharmacist before you use Amfexa Tablets. This is because this medicine can make these problems worse.
Warnings and precautions
Talk to your doctor or pharmacist before taking Amfexa Tablets if your child:
- has a disease of the blood or liver, or kidney problems
- is hyperexcitable or has an unstable personality
- has had fits (seizures, convulsions, epilepsy) or any abnormal brain scans (EEGs)
- is female and has started having periods (see the ‘Pregnancy and breast-feeding’ section below)
- has high blood pressure
- has a heart problem which is not in the ‘Do not use’ section above
- has a mental health problem which is not in the ‘Do not use’ section above. This may include mood swings, unusual aggression, hallucinations, delusions, paranoia, agitation and anxiety, feelings of guilt or depression.
Tell your doctor or pharmacist if any of the above applies to your child before starting treatment. This is because this medicine can make these problems worse. Your doctor will want to monitor how the medicine affects your child.
Checks that your doctor will make before Amfexa Tablets is used
These checks are to decide if this is the correct medicine for your child. Your doctor will talk to you about:
- any other medicines your child is taking
- whether there is any family history of sudden unexplained death
- any other medical problems (such as heart problems) you or your family may have
- how your child is feeling, such as feeling high or low, having strange thoughts or if your child has had any of these feelings in the past
- whether there is a family history of ‘tics’ (hard-to-control, repeated twitching of any parts of the body or repeating sounds and words)
- any mental health or behaviour problems you or other family members have ever had.
Your doctor will discuss whether your child is at risk of having mood swings (from being manic to being depressed - called ‘bipolar disorder’). They will check your child’s mental health history, and check if any of your family has a history of suicide, bipolar disorder or depression.
It is important that you provide as much information as you can. This will help your doctor decide if Amfexa Tablets is the correct medicine for your child. Your doctor may decide that other medical tests are needed before they start taking this medicine.
Effect on weight/growing
Amfexa Tablets may cause reduced weight in some children and adolescents.
- There may be lack of weight gain.
- Your doctor will carefully watch the height and weight of your child, as well as how well your child is eating.
- If your child is not growing as expected, then your doctor may stop treatment with Amfexa Tablets for a short time.
Having an operation
Tell your doctor if your child is going to have an operation. Amfexa Tablets should not be taken on the day of surgery if a certain type of anaesthetic is used. This is because there is a chance of a sudden rise in blood pressure during the operation.
This medicine may give a positive result when testing for drug use. Athletes must be aware that this medicinal product may cause a positive reaction to ‘anti-doping’ tests.
Children and adolescents
Amfexa Tablets is not for use as a treatment for ADHD in children under 6 years of age, and adults. It is not known if it is safe or of benefit for these people.
Other medicines and Amfexa Tablets
Tell your doctor or pharmacist if your child is taking, has recently taken or might take any other medicines, including medicines obtained without a prescription.
Monoamine oxidase inhibitors
Do not use this medicine if your child is taking a medicine called a ‘monoamine oxidase inhibitor’ (MAOI) used for depression, or has taken an MAOI in the last 14 days. Taking an MAOI with dexamfetamine may cause a sudden increase in blood pressure.
If your child is taking other medicines, this medicine may affect how well they work or may cause side effects. If your child is taking any of the following medicines, check with your doctor or pharmacist before using Amfexa Tablets:
- other medicines for depression, e.g. tricyclic antidepressants and selective serotonin reuptake inhibitors
- medicines for severe mental health problems, e.g. phenothiazines and haloperidol
- medicines for epilepsy, e.g. anticonvulsants like phenobarbital, phenytoin, primidone, and ethosuximide
- medicinal products that help to give up alcohol, e.g. disulfiram
- medicines used to reduce or increase blood pressure, e.g. guanethidine, clonidine, reserpine, or alpha-methyltyrosine, or beta-blockers such as propranolol
- some cough and cold remedies which contain medicines that can affect blood pressure.
It is important to check with your pharmacist when you buy any of these products.
- medicines that thin the blood to prevent blood clots, e.g. coumarin anticoagulants
- any medicines that contain glutamic acid HCl, ascorbic acid, ammonium chloride, sodium acid phosphate, sodium bicarbonate, acetazolamide, thiazides
- any of the following medicines: beta-blockers, antihistamines, lithium, noradrenaline, morphine, and meperidine.
If you are in any doubt about whether any medicines your child is taking are included in the list above, ask your doctor or pharmacist for advice before taking this medicine.
Amfexa Tablets with alcohol
Alcohol must not be consumed while taking this medicine. Remember that some foods and medicines contain alcohol.
Pregnancy and breast-feeding
Available data from the use of Amfexa Tablets during the first three months of pregnancy do not indicate increased risk of congenital malformation in the child, but may increase the risk for pre-eclampsia (a condition usually occurring after 20 weeks of pregnancy characterized by high blood pressure and protein in the urine) and preterm birth. Newborns exposed to amfetamine during pregnancy may experience withdrawal symptoms (changes in behavior including excessive crying, unstable or irritable mood, hyperexcitability and pronounced exhaustion).
If your daughter is pregnant or breast-feeding, she may be pregnant or is planning to have a baby, ask your doctor or pharmacist for advice before using this medicine.
- Your doctor will discuss contraception.
- If your daughter is pregnant she may have to stop taking this medicine.
- It is possible that this medicine is passed into human breast milk. Therefore, your doctor will decide whether your daughter should stop breast-feeding or stop taking this medicine.
Driving and using machines
Your child may feel dizzy, have problems focussing, or have blurred vision when taking this medicine. If so, it may be dangerous to do things such as drive, use machines, ride a bike or horse, or climb trees.
The medicine can affect your ability to drive as it may make you sleepy or dizzy.
- Do not drive while taking this medicine until you know how it affects you.
- It is an offence to drive if this medicine affects your ability to drive.
- However, you would not be committing an offence if:
- The medicine has been prescribed to treat a medical or dental problem and
- You have taken it according to the instructions given by the prescriber or in the information provided with the medicine and
- It was not affecting your ability to drive safely
Talk to your doctor or pharmacist if you are not sure whether it is safe for you to drive while taking this medicine.
Amfexa Tablets contains isomalt (E953)
If you have been told by your doctor that your child cannot tolerate some sugars, talk to your doctor before using this medicinal product.
3 HOW TO TAKE AMFEXA TABLETS
How much to take
Always use this medicine exactly as your doctor has told you. You should check with your doctor or pharmacist if you are not sure.
The normal recommended dose is between 5 mg and 20 mg.
- Your doctor will usually start treatment with a low dose of one tablet Amfexa Tablets. This will be increased gradually by one tablet Amfexa Tablets at weekly intervals, as required.
- The maximum daily dose is 20 mg (in rare cases, 40 mg may be needed).
- Your doctor will decide the need of giving Amfexa once or twice daily based on the course of symptoms at different times of the day.
How to take
The medicinal product is intended for oral use.
Your child should take Amfexa Tablets with a drink of water, preferably with or immediately after meals. Amfexa Tablets should be taken at the same time in relation to the meals. The last dose should, in general, not be given too late after lunch in order to prevent disturbances in falling asleep.
The tablets have a score line and can be divided, if needed. The score line is only there to help you break the tablet if there is difficulty swallowing it whole and not to divide into equal doses. To split it, place the tablet onto a hard surface with the cross-scored, smooth side downwards and then push carefully with your index finger at the centre of its top side. The tablet then breaks into four parts.
If your child does not feel better, tell your doctor. They may decide a different treatment is needed.
Your doctor will decide how long the treatment is given. If your child takes this medicine for more than a year, your doctor should stop treatment for a short time, e.g. during a school holiday. This will show if the medicine is still needed.
Not using Amfexa Tablets properly
If Amfexa Tablets is not used properly, it may cause abnormal behaviour. It may also mean that your child starts to depend on the medicine. Tell your doctor if your child has ever abused or been dependent on alcohol, prescription medicines or street drugs.
This medicine is only for your child. Do not give this medicine to anyone else, even if their symptoms seem similar.
If your child takes more Amfexa Tablets than they should
Talk to a doctor or call an ambulance straight away. Tell them how much has been taken. Show the package or this leaflet to the doctor. Overdosage of these tablets can be very serious.
Signs of overdose may include: excitement, hallucinations, convulsions leading to coma, irregular and rapid heartbeat, and reduced breathing.
If your child forgets to take Amfexa Tablets
Do not use a double dose to make up for a forgotten dose. If your child forgets a dose, wait until it is time for the next dose.
If your child stops taking Amfexa Tablets
If your child suddenly stops taking this medicine, this can lead to extreme tiredness, depression, mood disorders, agitation, sleep disturbances, increased appetite, or involuntary movements. Your doctor may want to gradually reduce the amount of medicine taken each day, before stopping it completely. Talk to your doctor before stopping Amfexa Tablets.
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
4 POSSIBLE SIDE EFFECTS
Like all medicines, this medicine can cause side effects, but not everybody gets them. Your doctor will talk to you about these side effects.
Very common: may affect more than 1 in 10 people
- decreased appetite, reduced weight gain and weight loss during prolonged use in children
- difficulty in sleeping
Common: may affect up to 1 in 100 people
- irregular or increased heartbeat, a more noticeable heartbeat
- abdominal pain and/or cramps, nausea, vomiting, dry mouth
These effects usually occur at the beginning of treatment and may be alleviated by taking the medicine with meals.
- changes in blood pressure and heart rate (usually increases)
- joint pain
- A feeling of dizziness or “spinning”, jerky or involuntary movements, headache, hyperactivity
- abnormal behaviour, aggression, excitation, anorexia, anxiety, depression, irritability
Rare: may affect up to 1 in 1,000 people
- angina pectoris
- difficulties in visual sharpening and focus, blurred vision, dilation of the pupils
- reduced height increase during prolonged use in children
- rash, hives
Very rare: may affect up to 1 in 10,000 people
- reduction in red blood cells which can make the skin pale and cause weakness or breathlessness, changes in blood cell counts (leukopenia, thrombocytopenia, thrombocytopenic purpura)
- cardiac arrest
- Tourette’s syndrome
- abnormal liver function ranging from hepatic enzyme elevations to hepatic coma
- muscle cramps
- convulsions, involuntary movements (choreoathetoid movements), bleeding inside the skull (intracranial haemorrhage)
- hallucinations, psychosis / psychotic reactions, suicidal behaviour or suicide, tics, worsening of pre-existing tics
- itchy red skin lesions (erythema multiforme) or scaly skin patches (exfoliative dermatitis), recurring rash, which happens in the same place each time the medicine is taken (fixed drug eruption)
- inflammation of the blood vessels of the spinal cord and brain (cerebral vasculitis) and/or occlusion
Not known: frequency cannot be estimated from the available data
- heart muscle disease (cardiomyopathy), heart attack
- inflammation of parts of the large intestine when the blow flow is reduced (ischaemic colitis), diarrhoea
- chest pain, growth retardation during prolonged use, increased body temperature, allergic reactions including serious allergic reaction which causes swelling of the face or throat (angioedema) and serious allergic reaction which causes difficulty in breathing or dizziness (anaphylaxis), sudden death
- disturbance of the acid-base balance of the body (acidosis)
- abnormal muscle breakdown which can lead to kidney problems (rhabdomyolysis)
- difficulty in controlling movements (ataxia), dizziness, abnormal or impaired sense of taste, concentration difficulties, hyperreflexia, stroke, shaking (tremor)
- confusion, dependence, dysphoria, emotional instability, euphoria, impaired cognitive test performance, altered libido, night terrors, obsessive-compulsive behaviour, panic states, paranoia, restlessness
- renal damage
- sweating, hair loss
- circulatory failure
- Fingers and toes feeling numb, tingling and changing colour (from white to blue, then red) when cold (Raynaud's phenomenon).
Reporting of side effects
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 the Yellow Card Scheme, website: www.mhra.gov.uk/yellowcard 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.
5 HOW TO STORE AMFEXA TABLETS
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 blister and the box after “EXP”. The expiry date refers to the last day of that month.
Do not store above 25°C.
Store in the original package in order to protect from moisture.
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 to protect the environment.
6 CONTENTS OF THE PACK AND OTHER INFORMATION
What Amfexa 10 mg/20 mg Tablets contain:
- The active substance is dexamfetamine sulfate
Amfexa 10 mg:
One tablet contains 10 mg dexamfetamine sulfate
Amfexa 20 mg:
One tablet contains 20 mg dexamfetamine sulfate
- The other ingredients are:
iron oxide, yellow (E 172) in Amfexa 10 mg
iron oxide, red (E 172) in Amfexa 20 mg
What Amfexa looks like and the contents of the pack:
Amfexa 10 mg Tablets
Yellow, round, cloverleaf-shaped tablets with a notched, cross-scored line on the top side and a cross-scored line embossed with “M” on each quarter on the rear side.
The score line is only to facilitate breaking for ease of swallowing and not to divide into equal doses.
Pack sizes: 20, 30, 48 or 50 tablets
Amfexa 20 mg Tablets
Reddish, round, cloverleaf-shaped tablets with a notched, cross-scored line on the top side and a cross-scored line embossed with “L” on each quarter on the rear side.
The score line is only to facilitate breaking for ease of swallowing and not to divide into equal doses.
Pack sizes: 20, 28 or 30 tablets
Boxes containing tablets packed in blisters made of PVC/PVdC aluminium foil
Not all pack sizes may be marketed.
Marketing authorisation holder and manufacturer
This package leaflet was last revised in 12/2021.
This medicinal product is authorised in the Member States of the EEA under the following names:
United Kingdom: Amfexa 10 mg/20 mg Tablet
Denmark: Attentin 10 mg/20 mg
Finland: Attentin 10 mg/20 mg
Iceland: Attentin 10 mg/20 mg
Luxembourg: Attentin 10 mg/20 mg
Norway: Attentin 10 mg/20 mg
Sweden: Attentin 10 mg/20 mg
This package leaflet is also available in formats appropriate for the blind and partially sighted.