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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 46302/0025.
Securon SR/Half Securon SR
Securon® SR / Half Securon® SR Tablets
modified-release
verapamil hydrochloride BP
Read all of this leaflet carefully before you start taking this medicine
1. What Securon SR / Half Securon SR is and what is it used for
2. What you need to know before you take Securon SR / Half Securon SR
3. How to take Securon SR / Half Securon SR
4. Possible side effects
5. How to store Securon SR / Half Securon SR
6. Contents of the pack and other information
Securon SR and Half Securon SR tablets belong to a group of medicines called calcium channel blockers. Calcium channel blockers change the amount of calcium getting into the muscle cells in your heart and blood vessels. This can change the strength and speed with which your heart beats. It also opens up the blood vessels so blood can be pumped around the body more easily. This helps more oxygen to get to your heart muscle and can lower your blood pressure.
Securon SR and Half Securon SR tablets are used to treat hypertension (high blood pressure) and to prevent angina (chest pain) attacks. The tablets may also be prescribed following a heart attack, to prevent another attack occuring.
The active ingredient in Securon SR and Half Securon SR tablets is verapamil hydrochloride.
Please tell your doctor or pharmacist if you are taking any medicines with or without a prescription or have recently taken any of the following medicines:
Tell your surgeon or dentist that you are taking Securon SR or Half Securon SR if surgery is planned as it may affect the anaesthetic used.
Do NOT drive, operate machinery or do anything that requires you to be alert, until you know how the tablets affect you.
Securon SR and Half Securon SR can make some people feel dizzy, especially when they first start to take the tablets.
Do NOT drink grapefruit juice whilst taking your tablets as it can affect the absorption of this medicine. This does not occur with other fruit juices such as orange, apple or tomato juice.
Securon SR and Half Securon SR will increase the time your body takes to get rid of alcohol. This means that you may not have to drink as much for your blood alcohol levels to be above the legal limit to drive. It will also take you longer to sober up.
Please discuss with your doctor if you are pregnant, planning to become pregnant or are breast feeding.
ALWAYS take this medicine exactly as your doctor has told you. Check with your doctor if you are not sure.
TAKE YOUR TABLETS with a glass of water. You should swallow the tablets without chewing or crushing them. It does not matter if you have not eaten.
The number of tablets that you will need to take will depend on what you are being treated for:
Hypertension (high blood pressure)
The recommended dose is one Securon SR 240 mg tablet a day. If you have not taken Securon SR 240 mg before, your doctor may prescribe a lower dose such as a Half Securon SR 120 mg tablet each day. The maximum dose to treat high blood pressure is 480 mg each day. This is usually taken as one Securon 240 mg tablet in the morning and one in the evening, leaving a gap of about 12 hours between each dose.
Angina (chest pain)
The usual starting dose for angina is one Securon SR 240 mg tablet taken twice a day. You should take one tablet in the morning and one in the evening, with a gap of about 12 hours in between them. Your doctor may prescribe a lower dose according to your symptoms.
Following a heart attack
The usual dose following a heart attack is 360 mg each day. This may be taken as one Securon SR 240 mg tablet in the morning and a Half Securon SR 120 mg tablet in the evening or as one Half Securon SR 120 mg tablet taken three times a day. The doctor will usually wait at least a week after your heart attack before prescribing these tablets.
Securon SR and Half Securon SR are NOT recommended for children under 12 years of age.
The dose will be the same as that for adults. If you have kidney or liver problem, your doctor may lower your dose.
If you take more tablets than prescribed (an overdose) you should contact a doctor or go to the nearest hospital casualty department IMMEDIATELY taking your tablets with you.
If you forget to take your tablets take them as soon as you remember, unless it is almost time for your next dose. If it is, do not take the missed dose at all. Do not take double dose to make up for a forgotten tablet.
If you stop taking your tablets your condition may get worse. It is important that you keep taking these tablets until your doctor tells you to stop. Do NOT stop just because you feel better.
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
As with all medicines, Securon SR and Half Securon SR can cause side effects, although not everyone will suffer from them. If you experience any other unusual symptoms whilst taking your tablets, tell your doctor or pharmacist.
The most common side effect is constipation. Other side effects include abnormal heart beat, flushing of the face or neck, headaches, feeling or being sick, abdominal pain or discomfort, dizziness, vertigo, tinnitus (ringing or buzzing in the ears), tiredness, tremor, movement disorders, muscle weakness, aches and pains in the joints and/or muscles, skin rash or itching, a tingling or prickling feeling on the skin, numbness and hair loss. Impotence may occur rarely.
Other side effects might occur if Securon SR or Half Securon SR are used for a long time. Tell your doctor if you develop swollen gums which start to spread over your teeth, or if your breasts swell (males) or start to produce milk (males and females). These effects are rare and are resolved upon stopping taking the tablets.
Do NOT take your tablets after the 'use by' date shown on the carton. Keep them in the original pack, at normal room temperature (do not store them above 25 °C).
Your tablets should be stored in a safe place out of the reach and sight of children, your medicine could harm them.
If your doctor decides to stop treatment, return any leftover tablets to your pharmacist. Only keep the tablets if your doctor tells you to. Do NOT dispose of leftover tablets carelessly (e.g. down the toilet or in with your general rubbish).
Securon SR tablets are pale green, oblong in shape, scored and embossed with two triangles on one side.
Half Securon SR tablets are white, round, biconvex and embossed with the word 'KNOLL' on one side and '120 SR' on the other.
The Securon SR and Half Securon SR tablets are available in calendar packs of 28.
This leaflet was last revised in February 2017.
MKP-00480-2016