Medical Oncologist
Medicines
Missed a dose of abemaciclib? What to do
If you miss or vomit a dose of abemaciclib, skip it and take your next dose at the usual time. Do not take two doses together. A single missed dose is very unlikely to affect your treatment. This page explains, in general terms, what to do in common situations, when to contact your team and how to avoid gaps.
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Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed September 2026, next review due September 2027
On this page
- What should you do if you miss a dose of abemaciclib?
- Four situations, and what usually applies
- Missed doses at a glance
- The vocabulary, in plain language
- Honest realities about missed doses
- Ways to remember your doses
- Planning your supply of tablets
- Missed doses versus pauses your team advises
- What people assume about missed doses
- Common questions about missed abemaciclib doses
The short answer
What should you do if you miss a dose of abemaciclib?
If you miss a dose of abemaciclib, or vomit after taking it, the usual advice is simple: do not take an extra dose. Skip the missed dose and take your next dose at the usual time. Never take two doses together to catch up, because that raises the level of the medicine in your blood and can make side effects such as loose motions and low blood counts worse. Abemaciclib is taken twice a day, so the gap to your next dose is never long, and a single missed dose is very unlikely to affect how well your treatment works. What matters much more is taking your tablets regularly over months and years. If you often forget doses, it is worth finding practical ways to help, such as linking doses to meals, using phone alarms or a pill organiser, or asking a family member to remind you. Tell your team at your next visit about any missed doses, and let them know sooner if you have missed several days in a row, if you are missing doses because of side effects, or if you have taken too much by mistake. In that last situation, contact your team or seek medical advice promptly, even if you feel well. Keep a record in a treatment diary so you can give an accurate picture at each appointment.
Do not double up
Taking two doses together can increase side effects without adding benefit.
Vomited dose? Do not repeat it
Even if you see the tablet, wait and take your next dose at the normal time.
Tell your team
Mention missed doses at your next visit, or sooner if you miss several or are unsure what to do.
This page gives general information only. Follow the instructions on your own prescription and from your pharmacist.Common scenarios
Four situations, and what usually applies
The same rule covers most situations: skip, do not double, carry on.
Forgot the morning dose
If you remember in the afternoon, most guidance says skip it and take the evening dose as usual. Check with your pharmacist if unsure.
Vomited soon after
Do not take another tablet. Take the next dose at the usual time, and tell your team if vomiting continues.
Ask about anti-sickness medicine.Unsure whether you took it
Do not take another. Treat it as taken, and use a pill organiser to avoid the same doubt next time.
Took an extra dose by mistake
Contact your team or a doctor promptly for advice, and watch for loose motions or feeling unwell.
Tell them
- How many extra tablets
- The strength on the pack
- When you took them
Quick guide
Missed doses at a glance
What happened
Usual advice
Missed one dose
Skip it, next dose at the usual time
Vomited a dose
Do not repeat it, next dose at the usual time
Missed several days
Contact your team before restarting
Ran out of tablets
Arrange a refill quickly and tell your team about the gap
Took too much
Seek medical advice promptly
Words you will hear
The vocabulary, in plain language
- Adherence
- Taking your medicine as prescribed over time.
- Dosing interval
- The gap between doses, about twelve hours for abemaciclib.
- Dose hold
- A pause in treatment that your doctor has advised, which is different from a missed dose.
- Overdose
- Taking more than the prescribed amount.
- Pill organiser
- A box with sections for each day and time that shows whether a dose was taken.
- Treatment diary
- A simple record of doses, side effects and questions for your team.
Being straight with you
Honest realities about missed doses
Almost everyone on long-term tablets misses a dose at some point. Guilt does not help, but good habits do.
An occasional miss is not a crisis
One missed dose is very unlikely to change the outcome of your treatment.
Frequent misses do matter
Research on long-term cancer tablets suggests regularly missing doses can reduce benefit over time.
Side effects are a common cause
If you skip doses because of loose motions or tiredness, tell your team, as a dose change may help.
What this page cannot tell you
It cannot tell you what to do after a long gap or an overdose. Your team must advise on those.
Talk to our team
Have a question about your situation?
Call the helpline or leave your details, and someone will help you arrange a consultation at the CION centre nearest you. One helpline serves every CION centre.
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Staying on track
Ways to remember your doses
Twice-daily tablets without a break are easy to forget, especially when routines change. These ideas help many people.
Anchor to meals
Keep the pack near where you eat breakfast and dinner, out of reach of children.
Use technology
Set two daily phone alarms, or use a medicine reminder app that records each dose.
Use a pill organiser
A weekly box with morning and evening compartments shows at a glance whether you took a dose.
Involve family
A spouse, child or friend can remind you, especially during festivals, travel or busy days.
Avoiding gaps
Planning your supply of tablets
Running out is a common reason for unplanned gaps in treatment.
Reorder early
Arrange your next supply at least a week or two before the pack runs out, as some pharmacies need time to order it.
Plan for travel and holidays
Carry enough tablets for the whole trip plus a few extra days, in your hand luggage.
Check approvals in advance
If insurance or a support programme needs paperwork, start it well before your supply ends.
Planned pauses
Missed doses versus pauses your team advises
A missed dose happens by accident. A pause, or dose hold, is a deliberate decision by your oncologist, usually because of low blood counts, liver test changes or loose motions that need to settle.
Follow restart instructions exactly
After a pause, your team will tell you when to restart and whether the dose has changed. Check that your new tablets match the new dose.
Before surgery or dental work
Your team may ask you to stop for a short time. Do not stop on your own for a procedure without asking first.
Commonly believed
What people assume about missed doses
I should take the missed dose with the next one.
Never double up; skip the missed dose.
If I vomit, I should take another tablet.
Do not repeat it; wait for the next dose.
One missed dose means the cancer will grow.
A single missed dose is very unlikely to make a difference.
Skipping doses is fine if I feel unwell.
Talk to your team rather than skipping on your own.
Questions we are asked
Common questions about missed abemaciclib doses
How late can I take a dose?
The approved product information advises skipping a missed dose and taking the next one at the usual time. Some pharmacists allow a short delay of an hour or two. If you are unsure, skipping is the safer choice, and you can ask your pharmacist for a personal rule.
Should I tell my doctor about a single missed dose?
You do not need to call about one missed dose. Note it in your treatment diary and mention it at your next appointment. Call sooner if you are missing doses often or because of side effects.
What if I missed doses for several days?
Contact your oncology team before restarting. Usually you simply restart at the usual dose, but they may want to check your blood tests or ask why doses were missed, especially if side effects were the reason.
What if I missed my hormone tablet too?
Rules for hormone tablets are often different, as they are taken once a day. For many, you can take a missed dose later the same day. Check the leaflet for your hormone medicine or ask your pharmacist.
Can I change my dose times?
Yes, you can shift your times gradually, keeping about twelve hours between doses. For example, move each dose by an hour a day. Ask your pharmacist if you are changing times because of travel across time zones or shift work.
I missed doses during a stomach upset. Is that a problem?
Tell your team. Stomach upsets can be side effects of abemaciclib, and loose motions with vomiting risk dehydration. Your team may advise a pause, fluids or medicine, and will guide you on when and at what dose to restart.
What if a child swallows my tablets?
Seek emergency medical help straight away, and take the pack with you. Store abemaciclib out of sight and reach of children, ideally in a locked cupboard or high shelf.
Does the pharmacist need to know about missed doses?
It helps. Pharmacists can suggest reminders, check whether you are running out early or late, and spot patterns that could point to side effects or confusion about the instructions.
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Sources
- European Medicines Agency — Verzenios: product information
- Macmillan Cancer Support — Abemaciclib
- Cancer Research UK — Abemaciclib (Verzenios)
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.