Can I Keep Taking Oral Targeted Therapy at Home? (2026 Guide)

Oral targeted therapies are typically taken daily at home, but it's recommended to start the first cycle in Korea so that your side effect pattern can be confirmed directly. After that, the standard approach is to continue the medication alongside regular check-ups.

Key Summary

• Oral-form targeted therapies are taken daily, generally with follow-up visits and tests every 1–2 months (National Cancer Center Korea).
• Because the first cycle requires direct monitoring of side effect patterns, starting treatment in Korea is recommended — many patients plan a stay of 2–3 weeks to cover testing plus the first cycle.
• As long as the drug is working, the principle is to keep taking it continuously, with response typically assessed by CT every 2–3 months.
• Whether you can continue the same drug after returning home depends on each country's approval and supply status, so this is checked in advance during the review (remote review) stage.
• The remote review (pre-arrival review) fee is KRW 1,000,000 (about US$730), which is deducted from treatment costs if you proceed with treatment.

How Do You Take the Daily Pill at Home?

• Targeted therapy refers to drugs that target specific proteins or genetic mutations involved in cancer cell growth, and broadly comes in three forms: oral pill-type inhibitors, intravenous antibodies, and antibody-drug conjugates.
• Oral inhibitors are taken at a fixed dose daily at home, with follow-up visits and blood tests usually every 1–2 months to check liver function and overall condition. Compared with injectable drugs, hospital visit intervals tend to be longer.
• The basis for selecting a drug is a biomarker confirmed in tissue or blood — for example, EGFR, ALK, and ROS1 in lung cancer; HER2 and CLDN18.2 in gastric cancer; HER2 and hormone receptors in breast cancer; and RAS and BRAF in colorectal cancer. A drug is never selected without test results.

Why Is It Recommended to Start the First Cycle in Korea?

• Because medical staff need to directly observe how side effects appear during the first cycle. A stay in Korea covering testing plus the first cycle often takes 2–3 weeks, and the written opinion specifies whether to continue treatment locally afterward or to make regular return visits.
• Step 1 — Biomarker testing is done using tissue or blood; depending on the test item, results take anywhere from a few days to 2–3 weeks.
• Step 2 — Once the drug is determined, the first cycle begins in Korea while response and side effects are observed.
• Step 3 — Response is typically assessed by CT every 2–3 months, and the medication is continued as long as it remains effective.
• Step 4 — After returning home, the written opinion will specify whether to continue the same drug locally or make periodic return visits to Korea.

What Side Effects Should Be Monitored While Taking Medication at Home?

• The side effect profile differs from cytotoxic chemotherapy. Hair loss and severe nausea are relatively less common, but each drug has its own characteristic reactions.
• EGFR-class oral drugs commonly cause acne-like skin rash, diarrhea, and inflammation around the nails; HER2-targeted therapy requires regular monitoring of heart function; and anti-angiogenic drugs require watching for elevated blood pressure, bleeding, and delayed wound healing.
• There are also rare but important side effects such as changes in liver enzymes and interstitial lung disease, so any new cough or shortness of breath should be reported to your care team immediately, even while at home. Most side effects can be managed through dose adjustment or supportive medication.

FAQ — Can I Bring Medication Home With Me?

In some cases, you may be able to take home a certain supply of oral targeted therapy along with your prescription. However, import regulations vary by country, so a coordinator will confirm this in advance. If the drug is not approved or available locally, treatment could be interrupted, so whether the medication can be continued is checked first at the review stage.

FAQ — What Happens If the Drug Stops Working?

Targeted therapies can also develop resistance over time. When this happens, the usual approach is to retest to identify what change has occurred and then move on to the next drug. The next option depends on the cancer type and the specific mutation involved.

Sources and Notes

• This article was written based on information regarding targeted therapy, principles of managing chemotherapy side effects, and notes on immunotherapy/targeted therapy side effects (National Cancer Center Korea, NCCN patient guidelines, U.S. National Cancer Institute/NCI).
• This content is intended for general medical information purposes only; actual diagnosis, treatment methods, and outcomes may vary depending on individual condition. Accurate diagnosis and treatment decisions should always be made in consultation with your medical team.