Side-effects from children’s medicines

This page provides information about side-effects from children’s medicines. It will support you in discussing any concerns with health professionals.

  • The Medicines Information page provide details about the side-effects of specific medicines.
  • When giving your child a medicine, if you notice anything unusual and are concerned, contact your doctor. You should continue to give the medicine as usual, unless your doctor tells you not to.
  • You can report any suspected side-effects to a UK safety scheme at
  • You can download the information sheet on ‘Side-effects from children’s medicines’ below, or the full information is also available to read on this page.

What is a side-effect?

We use medicines to help our children, but sometimes they have effects that we don’t want, such as feeling sick or getting a rash. These are called side-effects.

How do I know if my child has side effects?

If your child develops any new symptoms after starting a medicine, or at any other time, these may be side-effects. However, often it is difficult to be certain whether a medicine has definitely caused the symptoms or whether they are due to your child’s health condition or a new illness. If your child is taking lots of different medicines, it can also be difficult to work out which (if any) medicine or medicines have caused the symptoms.

What should I do if I think my child has a side-effect?

If it is a mild effect that is not causing your child any problem, you may not need to do anything immediately. However, if you are worried or it gets worse contact your doctor, pharmacist or nurse. If your child is very unwell take them to hospital. If you think your child is getting side-effects, it may helpful to keep a diary of when your child takes their medicines and any symptoms you notice – this will be useful to your doctor, pharmacist or nurse when working out what is causing the problem.

How long do side-effects last?

Children may get side-effects such as headache or nausea (feeling sick) when they first start taking a new medicine but these often wear off after a few days. Some side-effects will continue while your child is taking the medicine. Your doctor will give you advice about how to manage these side-effects.

What can my doctor do if side-effects are a problem?

Your doctor may be able to reduce the dose of the medicine so that your child can get used to it, or swap to a different medicine. You should not reduce the dose or stop giving the medicine without talking to your doctor. Sometimes you may need to discuss the balance between the benefits of treatment and the side-effects and whether these are acceptable. Your doctor will note in your child’s records if a particular medicine causes problems. It may be useful to keep a note of the name of the medicine, in case another doctor prescribes it. This is particularly important if your child has ever had an allergic reaction to a medicine.

Where can I find more information about side-effects?

Most medicines come with an information leaflet that explains what the medicine is for and how to take it. The leaflet also lists the possible side-effects ranging from those that are fairly common to those that are very rare.

Medicines for Children provides information about the side-effects specifically observed in children and young people. This information is prepared and written by experienced paediatricians and pharmacists for each of our medicine’s information leaflets, which are available to search from A-Z here: Medicines Information

Reporting side-effects to the medicines safety ‘watchdog’

  • The Medicines and Health Care products Regulatory Agency (MHRA) is the watchdog for the safety of medicines in the UK.
  • The MHRA monitors side-effects through its Yellow Card scheme.
  • The Yellow Card scheme acts as an early warning system to identify new side-effects and get more information about other problems that might not have been known about before.
  • If a new side-effect is identified, the MHRA will review the way the medicine is used, and any warnings that are needed to help minimise risk whilst maximising the benefit to the patient.
  • Reporting from members of the public can help the MHRA identify any new side effects or risks associated with medicines.
  • The Yellow Card scheme also welcomes reports of side-effects from herbal remedies and homeopathy treatments, vaccines, and medical devices, as well as defective or falsified (fake) products and e-cigarettes.

People are encouraged to report adverse reactions or side effects if:

  • They suspect that the side effect or adverse reaction was caused by a medicine they were taking, this includes reactions to herbal/homeopathic/vaccines/medical devices
  • The side effect occurs when they are taking more than one medicine or herbal medicine

It is important to include as much detail as possible in the report, particularly any brand name or manufacturer’s details relating to the medicine or medical product/device.

Anyone can report a side-effect to the MHRA via its Yellow Card Scheme:

Who to contact for more information

Your child’s doctor, pharmacist or nurse will be able to give you more information about side-effects from medicines. You can also get useful information from: