Antiangiogenic Drugs (VEGF Inhibitors): — How Starving a Tumour Works

The side effect profile is different, not necessarily easier. Nausea and hair loss are uncommon with VEGF inhibitors, but fatigue, high blood pressure, and effects on wound healing are frequent. Some people tolerate these drugs well and continue working; others find fatigue a significant challenge. The specific drug matters — TKIs taken daily as tablets tend to produce more consistent low-grade side effects, while infusion-based antibodies cause reactions around infusion days. Your team can tell you what is most common with the specific drug you are starting.

Antiangiogenic drugs significantly slow wound healing and increase bleeding risk. For any planned surgery, your oncologist will advise pausing treatment in the weeks before and after the procedure. The exact timing depends on which drug you are on and what operation is planned. Do not agree to any procedure — including a dental extraction or endoscopy — without telling both your surgeon and your oncologist, so they can coordinate. If emergency surgery is ever needed, the surgical team should be told immediately that you are on this class of drug.

Most TKIs are taken once or twice daily, at the same time each day. Some must be taken with food and some without — follow the specific instruction for your drug, because this affects how much reaches your bloodstream. Do not halve, crush, or chew tablets unless your team has confirmed it is safe. If you miss a dose, follow your team's guidance — the rule varies by drug. Never double the next dose to compensate for a missed one. Keep tablets in their original packaging, away from heat and moisture, and out of reach of children.

High blood pressure on VEGF inhibitors is common and manageable when caught early. Your team may start or adjust blood pressure medicine when treatment begins. The danger is pressure that rises rapidly to very high levels without being detected — this can rarely lead to a hypertensive crisis. Severe headache, visual changes, confusion, or chest pain during treatment are reasons to seek emergency assessment the same day, not to wait for your next appointment. Most people on these drugs are asked to check blood pressure at home and keep a simple log to share at each visit.

Yes. Grapefruit and grapefruit juice interact with several TKIs by affecting how the drug is broken down in the liver — it can raise drug levels to an unsafe range. Avoid grapefruit entirely while on these medicines unless your team explicitly says it is safe for your specific drug. Herbal supplements, including traditional remedies, can also interact — some affect the same liver enzymes. Tell your oncologist about everything you take, including Ayurvedic or homeopathic preparations, before starting. The purpose of that conversation is to make your treatment as safe as possible.

VEGF inhibitors are generally continued for as long as the tumour is responding and side effects remain manageable. There is usually no fixed number of cycles set in advance. Your oncologist reassesses with imaging at intervals and discusses the result with you. If the tumour begins to grow despite treatment, or if side effects become unacceptable, the plan will change — to a different drug in the same class, or to a different approach entirely. Some people stay on these drugs for months to years; others change after a few cycles. Your own response is what guides the decision.