Medical Oncologist
Before you start
How Long After Surgery — Can You Start Targeted Therapy?
The wait depends on three things: your wound needs to heal, your biomarker test results need to be ready, and your oncologist and surgeon need to agree you are fit to start. Each of those takes a different amount of time for different people.
Medically reviewed by Dr. Bharati Devi Gorantla, Medical Oncologist, MBBS · MD · DM (Adyar, Chennai) · ECMO · MRCP SCE (UK) · Last reviewed August 2026
- Wound healing comes first — Starting too soon can interfere with surgical recovery, especially for some targeted drugs.
- Test results must be ready — Targeted therapy is matched to your tumour's molecular profile, and those results take time.
- The drug type matters — Some targeted therapies that affect blood vessel growth require a longer gap after surgery.
- Your team decides together — Your surgeon and oncologist both have to clear you before a start date is confirmed.
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There is no single waiting period that applies to everyone. Your oncologist and surgeon decide together, checking three things: your wound must be healed, your biomarker test results must be ready, and your body must have recovered enough to tolerate a new treatment. The gap is usually a matter of weeks to months.
What decides when it is safe to start?
Wound healing is the first checkpoint. Surgery disrupts the body's natural repair process. Starting a new treatment before that repair is complete can slow wound healing — particularly for targeted drugs that affect blood vessel formation.
The second checkpoint is your biomarker results. Targeted therapy works only when it is matched to the right molecular profile in your tumour. If testing was not done before surgery, the laboratory can often use tissue removed during the operation. Results still take time to return once the sample is sent.
The third checkpoint is your general fitness. Blood counts, liver and kidney function, and your energy level all factor into whether your body is ready for a new treatment. Your oncologist checks these at your post-operative review.
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Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Interventional Radiologist
Dr. Mohammed Imran
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Surgical Oncologist
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What has to happen before your first dose?
Surgical wound heals
Your team watches for full wound closure and no signs of infection. How long this takes depends on how extensive the operation was — a keyhole procedure heals faster than open surgery.
Biomarker test results come back
If molecular testing was not done before surgery, tissue from the operation is sent to the laboratory. Your team will tell you when to expect results once the sample is received and logged.
Your surgeon confirms recovery
A post-operative review checks that the wound has closed and that you are no longer at risk of surgical complications. Your surgeon communicates the outcome to your oncology team.
Your oncologist reviews everything
Your oncologist checks your test results, blood work, and the specific drug being planned. Some targeted drugs — particularly those that affect blood vessel formation — need a formally longer gap after surgery. Your team will tell you if yours is one of them.
A start date is confirmed
Once all checkpoints are cleared, your oncologist schedules the first dose. The time from clearance to first dose depends on your treatment centre's schedule and whether any preparation is needed before you begin.
Did you know?
A group of targeted therapies work by blocking the formation of new blood vessels — the same process that healing wounds depend on. International oncology bodies including NCCN and ESMO address this overlap directly in their guidance on managing surgery alongside these drugs.
If your targeted therapy falls into this category, your team will give you a specific timeframe rather than a general one.
Source: NCCN Clinical Practice Guidelines in Oncology; ESMO Clinical Practice Guidelines
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Common questions
Frequently asked questions
Why can't targeted therapy start right after surgery?
The healing process and the way many targeted drugs work can pull in opposite directions. Some targeted therapies interfere with blood vessel formation, which is exactly what healing tissue needs. Starting too early can slow wound recovery, increase the risk of complications, and put pressure on organs that are already working hard after an operation. The wait is not a delay for its own sake — it is the time your body needs to be ready for the next treatment.
Can the tissue removed during surgery be used for biomarker testing?
Yes, and this is one of the practical advantages of having surgery first. The tumour tissue your surgeon removes can be sent directly to the pathology laboratory for molecular testing — including the analyses that determine which targeted therapy you are eligible for. Ask your team whether your sample is being used this way, so you are not waiting on a result that has not yet been requested.
What if I feel I need to start treatment urgently?
Your oncologist is weighing the same concern. If there is a clinical reason to start sooner, the timeline can sometimes be adjusted — but that decision belongs to your team, who can see your wound, your imaging, and the specific drug being planned. The most useful thing you can do is ask directly: 'Is there any reason we could start sooner, and what would that require?' That gives your oncologist the chance to explain what is driving the timeline and whether any of it is flexible.
Does the type of surgery affect how long I have to wait?
Yes. A more extensive open operation generally requires more healing time than a keyhole or laparoscopic procedure. Operations near blood vessels, lymph nodes, or organs that the targeted drug is known to affect may also need a longer gap. Your surgeon is the right person to explain how your specific operation shapes the waiting time, and they should communicate this clearly to your oncology team.
What should I ask at my post-surgery appointment about starting targeted therapy?
Ask your surgeon three things: whether the wound has healed completely, whether any complications are still being monitored, and whether they have communicated a clearance to your oncology team. Then at your oncology appointment, ask which biomarker results are still outstanding and what they need to show before a start date is set. Having both conversations close together prevents delays that happen simply because information has not moved between teams.