AC-T: what to expect
Used for: Breast cancer
Cliff notes
Drugs in it: Doxorubicin (Adriamycin), Cyclophosphamide, Paclitaxel (Taxol).
Typical schedule: Usually 4 cycles of AC (doxorubicin + cyclophosphamide) every 2 or 3 weeks, then paclitaxel (T) weekly for 12 weeks or every 2–3 weeks for 4 cycles. Total is often around 4–6 months. 'Dose-dense' means every 2 weeks with growth-factor shots.
What to expect: AC often brings nausea, tiredness and hair loss. The T part more often brings tingling in hands and feet and achy muscles. Low blood counts can happen throughout. Doxorubicin can affect the heart, so you may have a heart test before starting.
Your exact schedule and number of cycles are set by your oncologist and may differ from what's described here.
Side effects to know
- Fatigue (extreme tiredness)
- Hair loss from chemo
- Low blood counts and infection risk (neutropenia)
- Mouth sores (mucositis)
- Nausea and vomiting
- Neuropathy (numbness and tingling)
Call your care team now if you have:
- Fever of 100.4°F (38°C) or higher, or chills (possible infection when blood counts are low)
- Vomiting or diarrhea that won't stop, or you can't keep fluids down
- Unusual bleeding or bruising
- Shortness of breath or chest pain
- Signs of an allergic reaction during or after an infusion: trouble breathing, swelling of the face or throat, hives
Call 911 for trouble breathing, chest pain or signs of stroke.
▶ Watch
Watch: How to Prepare for Your First Infusion Treatment (Chemotherapy, Immunotherapy or Targeted Therapy) (Fred Hutch Patient Education)
Watch: Chemotherapy: What to Expect on Your First Day (Missouri Baptist Medical Center)
Videos open on YouTube and are made by the channels named. We don't host them.
❓ Questions to ask your doctor
- What is the goal of this treatment for me?
- How will we know if it's working?
- Which side effects should I call about right away, and what number do I call after hours?
- Which medicines, vitamins or supplements should I avoid?
- Will this affect my ability to work, drive or care for my family?
- What will this cost me, and who can help me with coverage?
- How many cycles will I get, and what happens after?
Help paying
See each drug page for programs, or the independent foundations. Infused chemo is usually covered by Medicare Part B; see Medicare and your cancer drugs.
- PAN Foundation: Copays and coinsurance, including for people with Medicare, when a disease fund is open.
- HealthWell Foundation: Grants for copays, deductibles and premiums when a fund is open.
- CancerCare Co-Payment Assistance Foundation: Help with treatment copays for insured people under income limits.
- Good Days: Copay help and some travel costs.
- NeedyMeds: Free database of assistance programs, open to anyone.
Common questions
AC-T vs TC: what's the difference?
TC (docetaxel + cyclophosphamide) skips doxorubicin, which avoids its heart risk. Your oncologist chooses based on your cancer's features.
What should I expect from AC-T?
Most people lose their hair during AC, feel tired, and have some nausea that medicine can control. Paclitaxel brings a higher chance of neuropathy.
Written by the Cancer Side Effects Guide team from FDA labels and leading cancer centers. Not medical advice. · Last updated: October 15, 2026 · How we write