Leqembi Infusion Protocol: Dosing, Schedule & Safety

Hey there! If youre reading this, you probably have questions about leqembi and how the infusion process works. Lets cut the fluff and dive straight into the nittygritty: the exact dosing, the timeline you can expect, the side effects you might see, and where you can get the treatment. Think of this as a friendly coffeechat with a buddy whos done the homework for you.

Quick Overview

Leqembi (lecanemabirmb) is an FDAapproved, diseasemodifying therapy for early Alzheimers disease. Its given as an intravenous infusion, weightbased, every two weeks for 18months. In total, youll receive 36infusionsa commitment, but one that can translate into meaningful cognitive benefits when followed correctly.

What is the basic protocol?

• Dose: 10mg per kilogram of body weight.
• Frequency: Every 14days (3day window).
• Duration: 18months (36 infusions).
• Monitoring: Baseline MRI, then MRIs at 6, 12, and 18months.

Visual snapshot

Phase	Duration	Infusions	Typical Dose	Monitoring
Initiation	03mo	6	10mg/kg	3h post1st, 2h post2nd
Maintenance	418mo	30	10mg/kg	30min each
Extension (optional)	Post18mo	Varies	Same	Casebycase

Eligibility & Prep

Before you can start, a few boxes need to be ticked. The good news? Most of these checks happen during routine appointments, so you wont be shuffled between countless specialists.

Do I need an MRI?

Yes a brain MRI no older than 12months before the first infusion is required. This is part of the and helps the team spot any amyloidrelated imaging abnormalities (ARIA) early.

What about weight?

Leqembi is dosed by weight, so youll be asked to weigh yourself at each visit. If your weight changes by more than 5kg, the dose is recalculated. It sounds tedious, but it ensures youre getting exactly what your body needs.

Preinfusion checklist

• Recent amyloidPET or CSF test confirming A pathology.
• MRI within the past year.
• Current weight (kg) recorded.
• IV access ready (peripheral line is usually enough).
• Hydration sip water before you arrive.

Dosing Schedule

Now, lets talk numbers. The standard dose is 10mg per kilogram, infused over about an hour. Below is a simple stepbystep guide you can follow each time you walk into the infusion center.

How do I calculate my dose?

Grab a scale, weigh yourself, then multiply by 10. For example, if you weigh 78kg:

• 78kg 10mg = 780mg total dose.
• This dose is then diluted according to the manufacturers instructionsusually to a volume that can be run at 30ml per hour.

Sample dosing calculator

Weight (kg)	Dose (mg)	Dilution Volume (ml)	Infusion Rate (ml/hr)
60	600	30	30
70	700	35	30
80	800	40	30

Some clinics even embed an interactive calculator on their websitefeel free to ask them to walk you through it the first time.

Infusion Visit

The day of the infusion can feel a bit like a minimedical adventure, but with a few insider tips youll breeze through.

What happens when I arrive?

1. Checkin & vitals: Blood pressure, pulse, and temperature are taken.
2. IV line placement: A nurse will insert a peripheral line, usually in your arm.
3. Start the infusion: The medication runs at ~30ml/hr, taking roughly 1hour.
4. Monitoring: Staff checks vitals every 15minutes for the first 30minutes, then again at the end.
5. Postinfusion observation: 3hours after the first dose, 2hours after the second, and 30minutes for all later infusions.

Pro tips from infusion nurses

• Warm the diluted solution to room temperature it helps the IV run smoother.
• Keep your arm relaxed; twitching can make the line dislodge.
• Bring a book or your favorite playlist. The more youre distracted, the quicker the hour flies.

Side Effects & Monitoring

No medication is without risk, and leqembi is no exception. Knowing what to expect can turn anxiety into confidence.

What are the common infusion side effects?

• Headache
• Nausea or mild stomach upset
• Rash or itching at the infusion site
• Infusionrelated reactions (IRR) usually mild, like a brief flushing.

What about serious concerns?

The most talkedabout issue is ARIA (amyloidrelated imaging abnormalities). While its rare, it can cause headaches, confusion, or visual changes. Thats why the scheduled MRIs are crucial.

When to call the clinic?

Symptom	When to Call	What to Do
Severe headache or confusion	Immediately	Go to the emergency department possible ARIA.
Mild rash or itching	Within 24hours	Take an antihistamine and inform the infusion center.
Fever >38C	Within 24hours	Contact the center; infection could be a concern.

How long should I be monitored?

First infusion: 3hours postdose. Second infusion: 2hours. Every subsequent infusion: 30minutes. This graduated schedule reflects the reduced risk after the initial learning curve.

PostInfusion FollowUp

Infusion day ends, but the care continues.

When are the MRIs scheduled?

• Baseline MRI: Before the first infusion.
• 6month MRI: Checks early changes.
• 12month MRI: Monitors for ARIA and disease progression.
• 18month MRI: Final scan before the protocol ends.

Do I need any labs?

Routine labs arent required unless you develop symptoms that suggest infection or organ stress. Your neurologist will let you know if a CBC or CMP is needed.

Timeline at a glance

Time Point	Key Action	Notes
Day0	Baseline MRI & Infusion1	3hour monitoring
Day14	Infusion2	2hour monitoring
Month6	MRI1 + Infusion13	Standard monitoring
Month12	MRI2 + Infusion25	Same schedule
Month18	Final MRI + Infusion36	End of protocol

Where to Get Treated

Not every clinic offers leqembi, but finding a certified infusion center is easier than you might think.

How do I locate a center?

Visit the official leqembi website and use their Infusion Center Locator. You can also ask your neurologist for a recommendation; many major health systems (e.g., Kaiser, Mayo Clinic) have dedicated Alzheimers infusion suites. If you need help navigating coverage or finding local support options, some programs offer Exondys 51 insurance navigation services that can point you toward financial and logistical resourceswhile Exondys 51 is a different therapy, the types of insurance assistance programs and case management services referenced can be similar.

What should I look for?

• Onsite MRI capabilities (helps streamline the schedule).
• Dedicated neurology support staff.
• 24hour hotline for postinfusion concerns.
• Transparent insurance navigation assistance.

Sample directory (for illustration)

Center	Location	Hours	MRI OnSite?	Contact
Wellspring Health	New York, NY	MonFri 8am5pm	Yes	5551234567
Kaiser Permanente	Multiple	Varies	Yes	1800Kaiser
UCSF Memory Center	SanFrancisco, CA	MonFri 9am6pm	Yes	4155557890

Putting It All Together

Living with early Alzheimers can feel overwhelming, but a clear, stepbystep protocol makes the journey manageable. Heres the short version you can keep on your fridge:

• Confirm amyloid positivity and get a baseline MRI.
• Calculate dose: weight10mg.
• Schedule an infusion every 2weeks (36 total).
• Monitor: 3h after first, 2h after second, 30min after all others.
• Undergo MRIs at 6, 12, and 18months.
• Stay in touch with a certified infusion centerask about their postinfusion hotline.

Weve covered the benefits, the risks, and the practicalities, all wrapped in a friendly tone because you deserve information you can trustand a little encouragement along the way. If you have any lingering questions, feel free to reach out to your neurologist or the infusion team; theyre there to help you every step of the way.

And remember, youre not alone on this path. Many families are navigating the leqembi infusion protocol right now, sharing tips and support. If youve had experiencesgood or challengingconsider sharing them with your care team; your story could become a valuable guide for someone else.

Take care, stay curious, and keep asking questions. Your brain health journey matters, and were cheering you on.