Dr Alf Collins, a consultant in pain management at Musgrove Park Hospital, Taunton, says everybody who has pain should consider taking painkillers. But different painkillers work better for different types of pain.
If the pain is caused by sensitive or damaged nerves, as is the case with shingles or sciatica, it is usually treated with tablets that are also used for epilepsy and depression. These tablets change the way the central nervous system works.
The aim of taking medication is to improve your quality of life. All painkillers have potential side effects, so you need to weigh up the advantages of taking them against the disadvantages.
Paracetamol is used to treat headaches and most non-nerve pains. Two tablets of paracetamol up to four times a day is a safe dose for adults. Side effects are not common and this dose can be taken regularly for long periods.
Overdosing on paracetamol can cause serious side effects, however, so don't be tempted to increase the dose if your pain is severe.
If the pain lasts for more than three days, see your GP.
So-called non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen, diclofenac and naproxen, seem to work better when there is clear evidence of an inflammatory cause, for example arthritis or an injury.
They should not be used for a long period unless you have inflammation. If you take them for long periods, there's an increased risk of stomach upset, including bleeding, and kidney and heart problems. Don't take more than the recommended dose as this will increase the risk of serious side effects.
Aspirin produces the same type of side effects as other NSAIDs, but is not as effective as a painkiller, which means it's not usually prescribed for pain. It is dangerous for children under 16.
Codeine doesn’t work very well on its own. It works better when combined with paracetamol in a single pill. You can buy co-codamol (paracetamol and low-dose codeine) over the counter. Higher dose codeine has to be prescribed.
Other medium-strength prescribed painkillers include tramadol (Zydol) and dihydrocodeine.
All these painkillers can cause dependency, which means that when you stop taking them you may feel unwell for a short period. If you need more and more of these drugs, contact your GP or other healthcare professional for advice.
Effervescent painkillers are high in salt and can contain up to 1g salt per tablet.
Too much salt can raise your blood pressure, which puts you at increased risk of health problems such as heart disease and stroke.
You may want to consider switching to a non-effervescent painkiller, especially if you've been advised to watch or reduce your intake of salt.
Amitriptyline is a drug for depression and gabapentin is a drug for epilepsy. Each of these tablets can also be used to treat pain caused by nerve sensitivity or nerve damage, such as shingles, diabetes nerve pain and sciatica. You don’t have to have depression or epilepsy for these tablets to help your nerve pain.
Amitriptyline and gabapentin both have to be prescribed by a GP. Side effects include drowsiness and dizziness.
Morphine and morphine-like drugs (for example, oxycodone, fentanyl and buprenorphine) are the strongest painkillers there are. Some come as a patch, but they all work in similar ways and should only be used for severe pain.
They will only be prescribed after consultation with your GP or a pain specialist. The dose and your response will be closely monitored. These drugs should only be used as part of a long-term plan to manage your pain.
Read about the NHS help on offer if you have persistent pain.
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