Your Lu-177 PSMA infusion is done. You are heading home. The first week after treatment can feel uncertain. You may wonder whether it is safe to be near your family, when you can go back to work, and whether it is okay to exercise. This article answers those questions using current clinical guidance and published research.
If you want to understand what happens during the infusion itself, our procedure guide is a useful starting point: What Happens During a Lu-177 PSMA Infusion — A Step-by-Step Guide for First-Time Patients.
How Lu-177 PSMA Keeps Working After You Leave the Clinic
After a Lu-177 PSMA infusion, the radioactive substance, lutetium-177, circulates through your body. It attaches to cells that carry the PSMA protein, which is found in high amounts on many prostate cancer cells. Once attached, it releases targeted radiation to those cells. The lutetium-177 that does not bind to cancer cells leaves your body mainly through your urine.
The physical half-life of lutetium-177 is approximately 6.65 days. This means the radioactivity in your body falls by roughly half every 6 to 7 days. Published research on the radiation safety logistics of Lu-177 PSMA therapy shows that the first few days after infusion carry the highest levels of radiation. By the end of the first week, those levels have begun to drop noticeably. The precautions still matter throughout that window.
The First 24 to 48 Hours: What Your Body May Feel
Most men leave the treatment center within a few hours of their infusion, once radiation levels meet local safety requirements. Some countries require a longer stay or overnight observation. Your care team will tell you when you are cleared to go home.
In the first 48 hours, you may notice:
- Mild nausea. This is the most common early symptom, typically peaking in the first day or two after the infusion.
- Fatigue. Feeling tired in the days following treatment is very common and may continue for several weeks.
- Reduced appetite. You may not feel like eating much at first. Small, bland meals can be easier to manage.
- Dry mouth. Some men notice this starting in the first few days, as the salivary glands carry PSMA receptors and can be affected by the treatment.
According to the Mayo Clinic drug information page for lutetium Lu 177 vipivotide tetraxetan, commonly reported side effects include fatigue, dry mouth, nausea, reduced appetite, and constipation. Most of these are mild. Tell your care team about any that concern you at your next check-in.
Radiation Safety at Home: The Rules That Protect Your Family
After your infusion, you carry radiation inside your body. Most of it leaves through your urine, which makes bathroom hygiene the single most important safety habit you can practice at home. The people at the highest risk from close contact with you are children, pregnant individuals, and anyone who spends long periods of time very close to you.
Clinical best practices for radiation safety during Lu-177 therapy, together with guidance based on FDA prescribing information for this class of treatment, recommend the following home precautions:
- Distance from other adults: Stay at least 3 feet (about 1 meter) away from other adults for 2 days after your infusion.
- Distance from children and pregnant individuals: Maintain that same 3-foot distance for 7 full days. Young children are more sensitive to radiation and need a longer buffer period.
- Sleeping: Sleep alone for at least 7 days. You do not need to leave your home. A separate bed or bedroom is enough.
- Sexual contact: Most published guidance suggests waiting 7 days before resuming sexual activity.
- Toilet hygiene: Flush twice after each use. Wipe any splashes from the toilet seat. Wash your hands thoroughly every time.
- Separate bathroom: If your home has more than one toilet, use your own for the first few days.
- Laundry: Wash clothing and bed linen in contact with your skin promptly. Wear gloves when handling shared laundry in the first few days.
- Hydration: Drink plenty of fluids throughout the day. This helps your kidneys clear radioactive material through your urine more quickly.
Your care team will give you a written copy of these instructions when you leave the clinic. Keep it somewhere accessible at home. For guidance on how a partner or family member can help during this time, see our caregiver resource: What Should My Spouse or Caregiver Know About Helping Me Through Lu-177 PSMA Treatment — A Practical Guide for Partners.
Can You Return to Work?
Whether you can go back to work in the first week depends on two things: the type of work you do, and how you feel physically.
Desk, administrative, or remote work: If your job does not require close, prolonged contact with other people, many men are able to return to some form of work by around the end of the first week, once the first week of safety precautions is over. Working from home is a practical option for the early days if you can.
Work involving close contact with others: If your job places you within 3 feet of other people for extended periods (customer service, teaching, healthcare, or retail), you will need to wait until after the 7-day safety period. If you work around children or pregnant colleagues, the same 7-day precautions apply at work.
Physical or manual labor: Strenuous physical work is best avoided in the first week. Fatigue after a Lu-177 PSMA infusion is real, and heavy lifting or physically demanding tasks can be risky when you are tired and your body is still recovering from treatment.
Commuting and public transport: Guidance on Lu-177 PSMA treatment logistics generally recommends limiting time on public transport on the day you leave the clinic, with private transport preferred for the journey home. Extended daily commutes on crowded buses or trains in the first few days are worth discussing with your care team before you resume them.
Your oncologist knows your specific situation, including your radiation levels, your general health, and the regulations in your country. Always confirm the right timing with them before returning to any workplace setting.
Exercise and Physical Activity
Light activity is generally fine after the first day or two, as long as you feel up to it. Short, gentle walks around your home or neighborhood are a reasonable starting point. Gentle movement supports circulation and mood during the recovery period.
There are two reasons to go slowly on more intense exercise in the first week:
- Radiation in sweat. Published radiation safety guidance for Lu-177 therapy notes that sweat carries a small amount of radioactive material in the days after treatment. If you exercise in a shared space (a gym, a pool, a fitness class), this matters for others in that environment. Shower right after you sweat in the first week.
- Fatigue. Fatigue is a common effect of Lu-177 PSMA treatment and may persist for several weeks. Pushing through exhaustion with intense workouts can slow your recovery rather than support it.
Gym sessions, swimming in shared pools, team sports, and heavy resistance training are generally better saved for after the first week. Discuss the timing with your care team first. They can advise based on your bloodwork, your energy levels, and how your body responded to the first infusion.
Social Life and Family Time
You do not need to isolate yourself completely. The radiation safety rules are about distance and time, not about cutting off contact with the people who matter to you.
Talking to family members from across the room is fine. Sitting at the dinner table together is generally acceptable as long as everyone keeps a reasonable distance. What needs to wait is close, extended physical contact (sitting on laps, sharing a bed, prolonged hugging).
Children: Very young children should not sit in your lap or sleep near you during the 7-day window. The Society of Nuclear Medicine and Molecular Imaging (SNMMI) recommends that patients receive written discharge instructions including specific contact restrictions based on the ages of children in the household. Older school-age children can be in the same home, but wait on close physical contact until the 7-day mark.
Pets: There is no established radiation risk from pets. Some centers suggest that pets not sleep on your lap or in your bed for the first few days as a precaution. Ask your nuclear medicine team for their specific recommendation.
Air travel: Do not fly immediately after treatment. Airport radiation detectors may identify lutetium-177 in your body. If travel is necessary, your treatment center can provide a medical letter explaining your status. Most care teams suggest waiting several days before flying, ideally until the first week is over.
Dry Mouth and Other Side Effects to Watch in Week One
Some men notice dry mouth beginning within the first few days of their infusion. This happens because the salivary glands carry PSMA receptors and can be affected by the treatment alongside cancer cells. For more on this side effect and how to manage it, see our dedicated article: Will Lu-177 PSMA Cause Dry Mouth and Salivary Gland Damage — What Men with Bone Metastases Should Know.
A temporary flare in bone pain can happen in the first few days after treatment. This is usually short-lived. Tell your care team if the pain becomes difficult to manage with your usual medication.
Blood count changes are not usually felt in the first week but can develop over the weeks that follow as the radiation affects bone marrow over time. Your care team will schedule regular blood tests to watch for this between infusions. Let them know right away if you notice unusual bruising, bleeding, or signs of infection before your next scheduled appointment.
What to Track This Week
Keeping a simple daily log helps your care team understand how your body is responding. Note down:
- Any nausea or vomiting, and when it began
- Your energy level each day on a simple scale of 1 to 10
- Any new or worsening pain, especially bone pain
- Changes in urination, including unusual color or discomfort
- Dry mouth, reduced appetite, or any other changes you notice
You will have a follow-up check-in with your care team after your first infusion. This log will help them decide whether any adjustments to your care are needed before your next cycle.
When to Call Your Care Team Right Away
Contact your oncologist or treatment center without delay if you experience any of the following:
- A fever of 38 degrees Celsius (100.4 degrees Fahrenheit) or higher
- Severe nausea or vomiting that you cannot control
- Burning or pain when urinating, or urine that appears very dark or bloody
- Signs of infection: chills, redness, or unexpected swelling
- Bone pain that your usual pain relief does not manage
- Unusual bruising or bleeding
- Shortness of breath or chest pain
Some of these symptoms may not be directly caused by your Lu-177 PSMA treatment. But all of them deserve prompt attention from your medical team.
When to Talk to Your Doctor
Before you leave the clinic after your infusion, ask your care team for written radiation safety instructions specific to your situation. Ask them how many days you should avoid close contact at work, when it is safe to resume exercise, and whether there are any special steps you need to take based on your home situation or the ages of people you live with. Different treatment centers and countries may follow slightly different protocols based on local regulations and your individual radiation measurements.
This article is for general information and is not a substitute for medical advice. Always consult your oncologist or care team about your specific situation.
Frequently asked questions
How long after my Lu-177 PSMA infusion do I need to avoid close contact with my children?
Most published guidance recommends maintaining a distance of at least 3 feet from children for 7 days after each infusion. For very young children under 2 years old, some protocols extend this further. Your treatment center will provide written discharge instructions tailored to your household situation and local regulations. When in doubt, more distance for a longer time is always the safer choice — and your nuclear medicine team is the best source of guidance for your specific case.
Can I drive myself home after a Lu-177 PSMA infusion?
Most treatment centers recommend being driven home by a companion on the day of your infusion. Driving yourself home on that day is generally not advised — the therapy can cause fatigue, and some centers require you to stay for several hours of observation after the infusion. On subsequent days, if you feel physically well and have no other medical restrictions, short drives are generally acceptable. Ask your care team for their specific guidance before your infusion day so you can arrange transport in advance.
Is it safe to use the same bathroom as my family after my Lu-177 PSMA infusion?
Using a dedicated bathroom is the safest option for the first 3 to 4 days if one is available in your home. If that is not possible, always flush twice after each use, wipe the toilet seat, and wash your hands carefully every time. These hygiene steps significantly reduce the risk of exposing household members to radioactive material that leaves the body in urine. Your care team will give you specific written instructions covering bathroom hygiene when you are discharged.
Will I feel well enough to work during the week after my first infusion?
This varies from person to person. Many men experience mild fatigue and possibly some nausea in the first few days. Some feel relatively well by day 3 or 4; others need more rest. If your work is remote or desk-based and does not require being within 3 feet of others, you may be able to return by the end of the first week. Physical, manual, or client-facing roles that involve close contact may require a longer break. Always discuss the timing with your oncologist before making a decision.
Can I go to the gym during the week after my Lu-177 PSMA infusion?
Light exercise such as short walks is generally fine from day 2 or 3 if you feel up to it. Shared gym spaces, swimming pools, fitness classes, and heavy resistance training are better avoided for at least the first week. This is partly because intense exercise causes sweating, which carries a small amount of radioactive material, and partly because fatigue after treatment is common and pushing too hard can slow your recovery. Check with your care team before resuming any strenuous workout routine.
What should I tell my employer about needing time off after my infusion?
You do not need to share your specific diagnosis or treatment details with your employer unless you choose to. A note from your oncologist explaining that you are undergoing a medical procedure requiring a short period of rest and reduced close contact with others is usually enough for HR or occupational health purposes. Your care team can help you put together appropriate documentation. If your role involves close contact with vulnerable people such as children, pregnant colleagues, or immunocompromised patients, discuss this with your oncologist before returning to work.