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Diagnosis and treatment

Medicines: a guide for supporters

You can help someone raise concerns about their medicines without having to make treatment decisions for them. This page brings together practical questions and a few precautions that are easy to miss.

If they may have taken an overdose

If you think they may have taken a harmful amount of medicine, call 999 or go to A&E. Do not wait for symptoms: these can be delayed. Take the medicine packaging if possible, and tell staff what may have been taken and when. Do not try to make them sick. Follow the call handler’s instructions.

NHS: poisoning and what to do while waiting for help. This emergency advice was checked on 5 October 2026.

Ask what help they want

You might help collect a prescription, make a list of questions or go to an appointment. Agree what would be useful. Do not take over their medicines or change the dose yourself. Ask the prescriber or pharmacist about changes, missed doses and unwanted effects; follow urgent advice specific to the medicine.

Keep the medicine name, strength, instructions and prescriber’s contact details where the person can find them. The pharmacy label and patient leaflet matter: instructions differ between medicines.

What are you worried about?

They feel worse or have side effects

Help them describe what has changed: when it began, how often it happens and what it stops them doing. “Too sleepy to get up for work since Monday” is more useful than “not themselves”. Include recent dose changes and other medicines or supplements.

Ask the prescriber or pharmacist what needs reviewing and how soon. Do not dismiss a problem because the medicine is helping something else. For severe or rapidly worsening symptoms, follow the medicine’s urgent instructions or get urgent help.

Prepare questions for a medicine review.

They have started an antidepressant, or the dose has increased

Ask when the next review is and who to contact between appointments. Antidepressants can help, but some people develop suicidal thoughts or an urge to self-harm when treatment starts. Take new or worsening thoughts seriously: contact the GP or prescriber straight away. If they may act on these thoughts or cannot stay safe, get urgent help now; do not wait for the medicine review.

NICE recommends a review one week after starting an antidepressant or increasing its dose for people aged 18 to 25, or anyone thought to be at increased risk of suicide. Ask the prescriber about the review plan and what changes they want to hear about. Do not change or stop the medicine yourself.

Sources checked on 5 October 2026: NHS: antidepressants, NHS: depression treatment and NICE NG222, recommendation 1.4.22.

They are older and take an antidepressant

Ask the prescriber or pharmacist to review all their medicines, including non-prescription products. In older people, antidepressant choices and monitoring need to take account of physical health, interactions, falls and low sodium in the blood, especially alongside medicines such as diuretics.

Report new side effects, unsteadiness or falls and ask what monitoring is needed. Sudden confusion needs immediate medical help: call 999 or go to A&E. Do not assume it is simply ageing or stop or change a dose yourself.

NICE: antidepressants in older people · NHS: sudden confusion. More about supporting an older parent.

They want to stop, or have already stopped

Ask why. Side effects, feeling better, difficulty remembering or not believing the medicine helps are different problems. Listen before trying to persuade them.

Offer to contact the prescriber together to discuss options and a safe plan. If they have already missed or stopped doses, say what was last taken and when. Do not guess a catch-up dose, double a dose or restart an old prescription without medicine-specific advice.

You can support a conversation without becoming responsible for making them take treatment. If their mental health is deteriorating, tell the care team what has changed; do not wait for a routine review.[1]

They take lithium

Lithium needs blood tests to check the level. Ask the team when the next test is due and what to do if they become ill. Severe vomiting, diarrhoea, fever or not eating or drinking can affect lithium levels: get urgent medical advice.

Possible lithium toxicity is an emergency. New confusion, marked drowsiness, difficulty speaking, blurred vision or pronounced shaking can be warning signs. The NHS lists the full signs and actions: stop lithium and call 999 or go to A&E. Taking more than the prescribed dose also needs emergency help, even if they feel well.[2]

They take clozapine

Clozapine needs regular blood monitoring and specialist follow-up. Keep the clozapine team’s number with the medicine details. Tell them promptly about an infection, fever or sore throat, or a change in smoking.

If it has been more than 48 hours since their last dose, do not restart their usual dose. Contact the clozapine team for instructions; restarting needs specialist supervision.[3]

Report constipation to the team immediately. A swollen abdomen, vomiting, or moderate to severe abdominal pain lasting over an hour needs immediate assessment at A&E. Clozapine-related constipation can become dangerous quickly; do not wait for the next routine appointment.[4]

They have a long-acting injection, or have missed one

Some antipsychotic medicines are given as a slow-release injection, sometimes called a depot or long-acting injection. The time between doses depends on the medicine and treatment plan. Ask for the medicine’s name, the next appointment date and the clinic’s contact number.

If an appointment is missed, contact the clinic or prescribing team promptly. Tell them which injection it is and when the last dose was given, if known. Ask what should happen next; do not guess how long it is safe to wait or add tablets to make up for it. Missed-dose instructions differ between medicines.

Report side effects to the team, including pain, redness or swelling where the injection was given. An injection keeps releasing medicine over time, so side effects cannot necessarily be resolved quickly by stopping it. Ask which changes need urgent advice.[5]

If they want your help, offer a reminder, a lift or company at the appointment. If they do not want the injection, help them discuss their reasons with the prescriber. If their mental health is worsening, get urgent help rather than waiting for the rescheduled appointment. You can pass on a concern even when staff cannot discuss their care with you.

What should we ask at the next appointment?
  • What is this medicine intended to help, and when will you review whether it is working?
  • Which side effects need a call that day, and who answers outside normal hours?
  • Are any blood tests or other checks due?
  • What should they do if they miss a dose, are sick, run out or want to stop?
  • Would reminders, different packaging or another treatment help?

Write down the answer for this medicine. The information-sharing template can help them discuss what the team may tell you.

Sources and how this guide was written
  1. Supporting a decision about stopping

    Mind: friends and family when someone is coming off medication recommends listening, respecting choices and offering practical support. The appointment prompts and observation examples are ours; this page does not give a withdrawal schedule.

    Back to the advice
  2. Lithium monitoring and urgent problems

    NHS: taking lithium covers monitoring, illness and overdose. NHS: lithium side effects gives the toxicity signs and emergency instructions. Follow the individual medicine instructions and clinical advice.

    Back to the advice
  3. Clozapine monitoring and missed doses

    NHS Specialist Pharmacy Service: clozapine clinical considerations covers blood monitoring, illness, smoking changes and the need for specialist re-titration after a break of more than 48 hours. We do not give a starting dose or a monitoring timetable.

    Back to the advice
  4. Clozapine and constipation

    NHS Specialist Pharmacy Service: constipation with clozapine gives the warning signs and need for immediate medical attention. The linked guidance contains further red flags; this is not a complete side-effect list.

    Back to the advice
  5. Long-acting antipsychotic injections

    NHS: antipsychotic treatment explains depot injections. NHS Highland: depot and long-acting injection guidance covers medicine-specific schedules, delayed doses, side effects and information to share between teams. This is a Scottish clinical guideline; we use it for medicine precautions, not UK-wide service or legal rules. The practical offers of help are ours. Sources for this section checked: 5 October 2026; next check due: 5 April 2027.

    Back to the advice

Antidepressant monitoring in later life checked against NICE NG222 and NHS sudden-confusion guidance: 8 October 2026.

Last full source check: 2 October 2026

Independent information, not a medical or crisis service. This guidance has not been clinically reviewed. How we use sources.