Sumatriptan feels funky after I take it.

Call your local poison centre now — before you take any more sumatriptan tonight — and tell them you took a second dose earlier than the packet's advice and now feel "funky".

I can't diagnose this from here, and I'm not going to invent tonight's dose limit: the packet in your hand and the pharmacist or poison centre are the only things that can settle that. Nothing in this plan tells you to change, stop or add a medicine.

Why this level. Sumatriptan commonly causes a warm, flushed feeling in the face, neck and chest, tiredness, dizziness, nausea, aching muscles, and a bit of breathlessness. Those feelings on their own are ordinary after this drug. What I can't see is how much you took, when, what else you took, or whether tonight is drifting into something that needs a doctor — and a second dose taken before advice was given is exactly what the poison centre line exists for. Asking early is the whole point; you don't need to feel worse to deserve a call.

Tonight / today: kitchen and home only

1. Pause self-directed dosing. No more sumatriptan tonight until a clinician or pharmacist tells you what is allowed. This is a pause on advice, not a change in your treatment — the person who prescribed it decides that.
2. Write the note before you call: time of the first dose, time of the second, the strength read off the packet (read it out to them, don't need to put it here), and every other medicine, supplement or herbal product you take — including anything for mood, sleep, or another migraine medicine. The patient leaflet specifically flags combining sumatriptan with certain antidepressants (SSRIs and SNRIs), lithium, St John's wort, and other migraine medicines such as ergotamine or another triptan. That list is exactly why the pharmacist asks.
3. Keep the packet with you and in the bag you take to the phone.
4. No alcohol, no driving, no machinery, no big decisions tonight. This medicine can affect alertness and coordination, and you still have a school week to run.
5. Home care for the headache itself: dark, quiet, cool room; water within reach; eat something if you haven't eaten (skipped meals are a listed migraine trigger); sleep if you can. Use only pain relief you have already been advised to use and already have at home — this plan adds no medicine and no dose.
6. Move the morning decision off yourself. If someone else can do the school run, the pickup or the covered lesson, ask them to. You are the adult who may need to drive; don't also be the one deciding at seven in the morning.

The person at home first

Sort the elder or sibling before the call. Tell them in one sentence: "I'm dealing with a medicine question and I'll be on the phone for ten minutes." Then get a neighbour, relative or the after-school service to sit with them, and don't change any of their medicines tonight without a clinician. If anyone at home takes an antidepressant or lithium, have their medicine list ready too — the call will ask.

If any of these appear — go now, don't wait for the call

Call your local emergency services now and say "I took sumatriptan and now have …":

• chest pain or tightness, or pain spreading to the arm, jaw or back
• swelling of the lips, tongue or throat, a widespread itchy rash, or trouble breathing
• a severe headache that peaks within seconds, or is the worst you have ever had
• one-sided weakness or numbness, slurred speech, sudden confusion, drowsiness you can't shake off, a seizure, sudden vision change
• a fast or irregular heartbeat with chest discomfort, or fainting
• repeated vomiting, or being unable to keep fluids down

If you can't reach the poison centre and any of these show up, the emergency call is the plan.

What to say on the call

> "I took sumatriptan, then took a second dose earlier than I should have. I feel [describe the funky feeling in plain words]. I also take [name every other medicine, including supplements]."

Ask: *Is anything else allowed tonight? What should I watch for, and for how long? Do I need to be seen? If I need to come in, where and when?* Don't take anything new tonight from an online shop, a free sample, or an unlabelled packet — no mystery powders, no buying prescriptions online.

What "better by tomorrow" looks like

• Tonight's success: the call happens, no further self-directed sumatriptan, the person at home is looked after, and your symptoms are stable or slowly easing.
• Within twenty-four hours, success means: a clear plan from the pharmacist or clinician — what is allowed tonight and tomorrow, what would send you in, and when you should be reviewed — plus your written note of dose times and other medicines.
• Not success: the feeling disappearing on its own. If it's still there in the morning, that's information for the clinician, not a reason to try something else.

What I could not verify from here

• Your local poison centre and emergency numbers. I have no verified line for where you are, so I won't guess one — use your local emergency number and the poison centre or urgent-advice line published by your national health service or on your pharmacy's page. If you can't find it before you feel worse, call your local emergency number.
• Whether the amount you took is within the packet's limit, and the correct spacing. I can't see the box, the clock or your history; the poison centre and pharmacist can, and the packet is the authority on its own limits.
• Whether tonight's feeling is one of the listed common effects or something else. That needs an examination and your history — not a message.

Attribution: the medicine information above draws on the NHS sumatriptan patient page, used under the Open Government Licence v3.0.

Source: nhs-conditions https://www.nhs.uk/medicines/sumatriptan/