If you or someone in your family is about to start chemotherapy, it is natural for the first session to bring nerves and plenty of questions. Knowing what to expect —how long you will be at the unit, what you will feel and what to bring— helps make that day feel less uncertain. Here we explain it calmly.
How long does a chemotherapy session last?
There is no single answer, because every treatment is different. In general, an intravenous chemotherapy session can last anywhere from 30 minutes to several hours, and with some regimens, most of the day.
The time depends on several factors:
- The drug or combination of drugs your oncologist prescribed.
- Premedication: before chemotherapy, you often receive medicines to prevent nausea or reactions, and that adds time.
- Hydration: some regimens require IV fluids before or after the infusion.
- The infusion rate: certain drugs must run in slowly, especially the first few times, so the team can watch how your body tolerates them.
On top of that, add check-in, vital signs and, in many cases, blood tests beforehand to confirm your body is ready to receive the treatment. That is why, for your first session, it is best to set aside the whole day and not schedule other commitments.
Your oncologist can tell you, before you start, how long your particular regimen usually takes. Do not hesitate to ask: it is a completely valid question.
What is a cycle, and how is it different from a session?
These terms are easy to confuse. The session is the day you receive the medication. The cycle is the session plus the rest period that follows, which allows your body to recover. For example, some regimens are weekly and others repeat every 14 or 21 days. The total number of cycles is set by your oncologist based on the type of cancer, the stage and your overall health.
How can you prepare in the days before?
A few simple recommendations that tend to help:
- Rest well the night before and have a light breakfast, unless your doctor says otherwise.
- Take your usual medications as directed, and bring a list of everything you take, including teas and supplements.
- Hydrate well starting the day before, as long as your doctor has not restricted fluids.
- Arrange who will come with you and who will take you home. Some medications can cause drowsiness or fatigue, so it is better not to drive after the session.
- Take care of things at home ahead of time (meals prepared, childcare arranged), so that after the session all you have to do is rest.
What should you bring on the day of your session?
The infusion can take hours, so comfort matters a lot:
- Comfortable, loose clothing, ideally with sleeves that roll up easily or a front opening if you have a port catheter.
- Something for the cold: infusion areas tend to be cool, and some IV fluids feel cold as they go in. A sweater, a light blanket, thick socks or thermal covers for hands and feet make a big difference. At our unit you can find comfortable clothing and thermal accessories designed for infusion days, in case you would like to see them before your first session.
- Entertainment: a book, a magazine, headphones, knitting, or simply good company.
- A water bottle and light snacks, such as saltine crackers, if your care team allows it.
- Your recent test results and your ID, to speed up check-in.
What does the infusion feel like?
Most people feel no pain during the infusion; an IV line is placed (or the port catheter is used) and the medication drips in while you rest, read or chat. The nursing staff will be watching over you the whole time, and you can speak up right away if you feel burning at the needle site, itching, dizziness or any discomfort. Side effects, when they occur, usually appear hours or days later and vary greatly from person to person: not all patients experience them the same way, and today there are supportive medications that help keep them under control.
And after the session?
When you get home, try to rest, drink fluids and eat light. Your team will give you written instructions about warning signs (such as fever) and which number to call if anything worries you. Remember that any symptom can have many different causes, and only your medical team can evaluate it properly, so when in doubt, it is better to ask than to keep worrying.
We are here to walk with you
At the Unidad de Oncología Menonita, our cancer center in Cuauhtémoc, we accompany patients and families from the region through every step of treatment, from the first evaluation to follow-up. If you or a loved one is about to start chemotherapy and you want to talk through your questions calmly, we will be glad to see you. You can book an evaluation by WhatsApp at 614 120 2911.
Sources:
- https://www.cancer.gov/espanol/cancer/tratamiento/tipos/quimioterapia
- https://chemocare.com/es/what-is-chemotherapy/iquestpor-cuaacutento-tiempo
- https://www.breastcancer.org/es/tratamiento/quimioterapia/que-puedes-esperar
This content is for information only and does not replace a medical consultation.