Common and mild
Many medicines can cause mild side effects, like an upset stomach, a headache, a dry mouth or feeling sleepy. They often ease within a few days or weeks. The leaflet lists the common ones.
Tell the doctor soon
Tell the prescriber if a side effect is bothering you, isn't settling, or affects school, sleep, appetite or mood. Changes in mood, feeling unusually anxious or agitated, or any thoughts of self-harm after starting or changing a medicine should be reported the same day.
Get help straight away
Swelling of the face, lips or tongue, difficulty breathing, a widespread rash, fainting or a seizure can be signs of a serious reaction. Call 112.
Don't stop on your own
Even if side effects are unpleasant, ask the prescriber before stopping. Some medicines must be reduced slowly, and there may be a simple fix.
When to talk to someone
Write down what you noticed, when it started and when you take the medicine, and share it with the doctor or pharmacist. The appointment sheet in Focus Lab has a space for this.
Need help now?
Talk to a parent, a teacher or another adult you trust. You can also call, free, any time: