Oncura

Carboplatin + Pemetrexed + Pembrolizumab: what to expect, day by day

Lung - NSCLC21-day cycle7 effects documented

Combines chemotherapy with immunotherapy. Expect lowered blood counts, nausea, and tiredness from the chemo, plus the possibility of immune-related organ inflammation from pembrolizumab. This combo raises the chance of kidney effects, so bloodwork is watched closely.

Chemo (carboplatin + pemetrexed) plus immunotherapy (pembrolizumab) every 3 weeks for non-squamous NSCLC. The chemo effects are nadir-based (days since infusion); the immune effects can occur ANY time (weeks-months). Kidney injury is more common than with chemo alone.

Get help straight away — this is true on any regimen, on any day.

A temperature of 100.4°F (38°C) or higher during treatment can mean a serious infection while your blood counts are low. Call your team or go to the ER — do not wait it out.

Also urgent: trouble breathing or chest pain · swelling of the face, lips or throat · new confusion or fainting · shaking chills · not being able to keep fluids down.

This is standing guidance shown to everyone. Nothing on this page is based on anything about you, and nobody is monitoring you.

Timed to the cycle

Day 1 is the day of your infusion. These are the effects a retrievable document ties to a day range for this regimen — not a prediction about you.

Neutropenia

Typically around days 14–28

A temporary drop in infection-fighting white cells, with the low point roughly 1-2 weeks after each infusion.

Call your team urgently: A temperature of 100.4°F (38.0°C) or higher — an emergency.

reported by about 25-30% of people; severe in 16-20% · Timing from the manufacturer’s prescribing information · from Carboplatin, Pemetrexed

Anemia

Typically around days 14–28

A drop in red cells that causes tiredness and breathlessness, building over cycles; some people need a transfusion.

Call your team: New or worsening breathlessness, chest pain, or a racing heart.

severe in 16.3% · Timing from the manufacturer’s prescribing information · from Carboplatin, Pemetrexed

Not tied to a cycle day

These build with the number of doses, or are measured from when treatment started, so a cycle day would be the wrong shape for them. Each keeps the timing its own source states.

Acute kidney injury

any time; chemo-related early or immune (weeks-months)

This combination raises the risk of kidney injury more than chemo alone — partly from the drugs and partly from possible immune inflammation of the kidney. Your team checks kidney bloodwork each cycle; staying well hydrated helps.

Call your team: Passing much less urine than usual, or marked swelling.

reported by about 6.2% of people; severe in 2-3% · from Pemetrexed, Carboplatin, Pembrolizumab

Nausea

Sickness in the first 24 hours is the "acute" phase and usually peaks 2-3 hours in; anything from 24 to 120 hours is the "delayed" phase.

Usually well controlled with anti-nausea medicine given before treatment; can be delayed over a few days.

Call your team: Can't keep fluids down for more than 12 hours.

reported by about 56% of people; severe in ~4% · Timing from a clinical guideline · from Carboplatin, Pemetrexed

Fatigue

Tiredness is very common and can build across cycles. If it's marked, your team may check thyroid/adrenal function.

reported by about 56% of people; severe in 12% · from Carboplatin, Pemetrexed, Pembrolizumab

Diarrhea

chemo-related early; immune colitis any time

Loose stools can come from the chemo, but new or worsening diarrhea may also signal immune bowel inflammation — report it early so the cause can be treated.

Call your team urgently: Diarrhea with blood/mucus, fever, or many extra stools a day — call urgently.

reported by about 31% of people; severe in ~5% · from Carboplatin, Pemetrexed, Pembrolizumab

Immune-related effects (thyroid, lungs, liver, skin)

any time on/after treatment, weeks-months

From the immunotherapy: the immune system can inflame the thyroid (most common), lungs, liver, bowel, or skin at any time. Report new cough/breathlessness, diarrhea, yellowing, marked tiredness, or rash — early treatment (often steroids) works well.

Call your team urgently: Severe breathlessness, diarrhea, or feeling very unwell — contact your team urgently.

reported by about 26.4% of people; severe in 10.9% · from Pembrolizumab

Where this comes from

  1. S1. Gandhi L / Rodríguez-Abreu D, KEYNOTE-189 (chemo+pembrolizumab, non-squamous NSCLC) (2018) — PMID 29658856
  2. S2. Pembrolizumab (Keytruda) FDA prescribing information — FDA label
  3. S3. Pemetrexed (Alimta) FDA prescribing information — FDA label

Timing windows on this page rest on:

A window appears here only where a retrievable document ties it to a drug in this regimen. Where nothing could be found, the window was removed rather than estimated — so a missing time is an honest gap, not an oversight.

Track your own cycle in Oncura →

Free, no account, nothing leaves your device.