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MEDICAL INFORMATION
Panzyga Key Facts
What is Panzyga?
Panzyga is the brand name for immune globulin and is available as an IV infusion.
What dosages is Panzyga available in?
Panzyga is available as a solution containing 10% IgG (100 mg/mL) for an IV infusion.
What is Panzyga used for?
Panzyga is an Immune globulin and is used for the following:
Conditions where your immune system is missing or not working as it should:
- Trouble fighting infections (primary humoral immunodeficiency or PI)
- Low platelets (chronic (long-term) immune thrombocytopenia or ITP)
- Nerve damage (chronic inflammatory demyelinating polyneuropathy or CIDP)
How does Panzyga work?
Panzyga is a replacement for immunoglobulin G (IgG). IgG is an antibody that your immune system makes to help protect against organisms like viruses, bacteria, and fungi. Certain medical conditions can cause your immune system to be too active or too inactive. The exact way Panzyga works to treat these medical conditions isn’t fully known. It’s thought to boost your immune system to help prevent infections. It also might help prevent an overly active immune system from attacking parts of your own body by mistake.
How do I take Panzyga?
Your dose of Panzyga depends on things like your body weight, lab results, and what you’re using Panzyga for. In general:
Trouble fighting infections (PI)
- Adults and children age 2 years and older: The typical dose is 300 mg/kg to 600 mg/kg infused into the veins (IV) once every 3 to 4 weeks
Low platelets (ITP)
- Adults: The typical dose is 1 gram/kg infused IV once daily for 2 days.
Nerve damage (CIDP)
- Adults: Typically, you’ll start with a loading dose of 1 gram/kg infused IV once daily for 2 days. Then, you’ll continue with a maintenance dose of 1 gram/kg to 2 gram/kg split into 2 doses (1 dose given daily for 2 days in a row), once every 3 weeks.
Is it safe for me to take Panzyga?
Panzyga is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. You should not use this medication in the following:
- History of anaphylactic or severe systemic reactions to human immune globulin
- IgA-deficient patients with antibodies against IgA and a history of hypersensitivity
Panzyga Common Side Effects
Common side effects of Panzyga:
- Stomach pain
- Sinus infection/inflammation
- Extreme tiredness
- Bronchitis
- Headache
- Fever
- Nausea
- Vomiting
- Dizziness
- Weakness, pale-colored skin, or other symptoms of low red blood cell count
Panzyga Serious Side Effects
Serious side effects are rare with Panzyga. Contact your healthcare provider immediately if you experience any of the following.
- Serious allergic reaction: difficulty breathing, hives, itching, fast heartbeat, tightness in the throat, nausea, stomach pain, dizziness, lightheadedness, swelling in the face or tongue
- Swelling in the brain: severe headache, neck stiffness, sensitivity to light, painful eye movements
- Lung problems: severe breathing problems, chest pain or tightness
- Dangerously high blood pressure: severe headache, dizziness, blurry vision, shortness of breath, lightheadedness
- Kidney problems: tiredness, dry and itchy skin, low appetite, urinating less than usual, foamy or bloody urine, muscle cramps
- Blood clots: lungs (cough, difficulty breathing, chest pain); legs (redness, pain, tenderness, swelling of the skin); heart attack (chest pain, pain in the arms or shoulders, pain in the neck or jaw); stroke (difficulty speaking, numbness on one side of the body, confusion)
- Breakdown of red blood cells: tiredness, dizziness, weakness, yellowing of the skin or eyes, dark-colored urine
Effects of other drugs, drug classes and over-the-counter products on Panzyga
The following medications may interact with Panzyga:
- The passive transfer of antibodies may confound the results of serological testing
- The passive transfer of antibodies may interfere with the immune response to live viral vaccines, such as measles, mumps, and rubella
Who makes Panzyga?
Pfizer Inc.
Is Panzyga safe in pregnancy?
It is not known if Panzyga harms your unborn baby. NYVEPRIA should be given to a pregnant woman only if clearly needed. Talk to your doctor about stopping Panzyga if you are pregnant or planning to become pregnant.
What is the generic name for Panzyga?
NowPatient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information on this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.
The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.
HOW IT WORKS
Order Delivery Guide


How will my order be delivered?
All orders are shipped in discreet and unmarked packaging, making them suitable for delivery to your home, workplace, or a neighbour. For your protection and safety, your first order can only be delivered to the address that is registered with NowPatient. Future orders can be delivered to any address you choose.
Where does NowPatient deliver?
NowPatient delivers to the UK, Europe, and worldwide. NHS services (such as NHS Online Pharmacy and NHS Pharmacy First) are available to patients in England only. Our private services and online pharmacy are available across the UK, with international shipping available to European and worldwide addresses. Please note that some remote or rural postcodes may experience slightly longer delivery times, and tracking availability for worldwide orders may vary depending on the destination country.
What delivery options are available?
UK orders are shipped via Royal Mail Tracked 24 & Signed, with next-day delivery as standard. European deliveries are sent via Royal Mail Tracked and typically arrive within 3–5 working days. Worldwide deliveries take 7–21 working days and are tracked where available in the destination country.
Delivery charges apply for most services. Shipping is included in the price for patients using our Get Treated Privately service in England, and is free for NHS Quit Smoking Service orders.
When will my order be dispatched?
We aim to dispatch all orders placed Monday to Friday before 3:00pm on the same working day. Orders placed after 3:00pm, or over weekends and bank holidays, will be dispatched on the next available working day.
Do you offer next-day delivery?
Yes. All UK orders are shipped via Royal Mail Tracked 24 & Signed, which delivers next day as standard. To qualify for same-day dispatch, please place your order before 3:00pm Monday to Friday. Orders placed after this time, or over weekends and bank holidays, will be dispatched on the next available working day.
Do you deliver temperature-sensitive or cold-chain medications?
Yes. We use a specialist courier service for all thermo-sensitive deliveries (such as insulin, GLP-1 weight loss injections like Mounjaro, and other refrigerated medications). Cold chain-validated packaging is used throughout the entire delivery process to ensure product quality, safety, and efficacy are always maintained.
How is cold-chain packaging handled?
Temperature-sensitive products are packed using validated cold chain packaging that maintains the required storage temperature throughout transit. Your parcel will normally receive an estimated delivery window from the courier on the day of delivery, so you can ensure someone is available to receive it. If you have concerns about receiving a cold-chain delivery, please contact our customer care team in advance.
Do you deliver controlled drugs?
Yes. Controlled drugs are delivered using a specialist courier service to ensure secure and compliant handling in accordance with UK regulations. These deliveries will always require a signature upon receipt.
How do I track my order?
Once your order has been dispatched, you will receive a dispatch notification containing your tracking details. You can also view your tracking information at any time in the 'Notification Feed' section on your account dashboard. Tracking is available for all delivery options.
Will I receive status updates about my order?
Yes. NowPatient uses a structured notification system to keep you fully informed throughout the order process. Every time your order status changes — from approval through to dispatch and delivery — you will be notified immediately. Notifications are sent via email and appear in the 'Notifications' section of your account homepage (accessible via the bell icon). This includes updates when your treatment is approved, dispensed, and shipped.
What order statuses will I see?
You can expect to see the following key status updates: Order Received, Prescription Approved (where applicable), Order Dispensed, Dispatched (with tracking reference), and Delivered.
Can I change my delivery address?
For your first order, delivery must be made to the address registered with NowPatient at the time of sign-up. This is a safety measure to verify your identity and protect your account. From your second order onwards, you can select from any saved address in your account or add a new delivery address during checkout.
Can I have my order delivered to my workplace or a neighbour?
Yes. From your second order onwards, you can have your medication delivered to any address, including your workplace, a family member's address, or a neighbour. All parcels are sent in discreet, unmarked packaging, so the contents will not be identifiable.
How do I update or add a new delivery address?
You can manage your delivery addresses directly within your NowPatient account settings. Additional addresses can also be added during the checkout process when selecting your delivery address. Simply select 'Add a new address' and enter the required details.
What should I do if my order hasn't arrived?
If you have not received your order within the expected delivery window, please first check your tracking details in the 'Notification Feed' section of your account dashboard. If after 10 days of dispatch you have still not received your delivery, please contact our customer care team and we will work to resolve the issue as quickly as possible.
What if my order arrives damaged?
If your order arrives in a damaged condition, please do not use the medication and contact our customer care team immediately. Please retain the original packaging and, if possible, take photographs of the damage, as this will help us raise a claim with the courier and arrange a replacement for you as quickly as possible.
My tracking shows delivered but I haven't received my parcel — what should I do?
First, check with any neighbours or safe locations at your property (such as a porch or outbuilding). If you still cannot locate your parcel, please contact our customer care team and we will investigate the matter with the courier on your behalf.
What happens if I miss my delivery?
If you miss a delivery, the courier will typically leave a card with instructions for rescheduling or collecting your parcel from a local depot. For cold-chain deliveries, it is particularly important to arrange redelivery promptly to maintain product integrity. If you have concerns about a missed cold-chain delivery, please contact our customer care team for guidance.
If you ship international, do I need to handle duties?
No. Our prices include customs duties, wherever you are located.
How are NHS repeat prescriptions delivered?
Once your GP has approved your prescription request, NowPatient's regulated online pharmacy will dispense and dispatch your medication. You will be notified at each stage of the process. NHS prescriptions are dispatched via Royal Mail Tracked 24 & Signed for next-day delivery, provided the order is placed before 3:00pm on a
working day.
Is delivery free for NHS prescriptions?
No. There is a small cost applied to all NHS prescription deliveries. This allows us to keep our service operational. NHS Quit Smoking Service orders qualify for free delivery. If you are using the Get Treated Privately service in England, shipping is included within the consultation and treatment price.
Can I specify a preferred delivery date for my NHS prescription?
At this time, NowPatient dispatches orders on the same working day if placed before 3:00pm Monday to Friday. All UK NHS prescriptions are sent via Royal Mail Tracked 24 & Signed for next-day delivery, so you can plan accordingly once you receive your dispatch notification.
How are private prescription medications delivered after a telehealth consultation?
Following your telehealth or video consultation, if a treatment is prescribed, it will be added to your cart automatically. After you complete checkout and payment, your order is sent to NowPatient's regulated online pharmacy for processing. You will receive status updates at every stage and your medication will be dispatched in discreet, unmarked packaging.
How quickly will I receive medication after my consultation?
If your consultation and checkout are completed before 3:00pm on a working day, we aim to dispatch your medication the same day. The total time to delivery will depend on the delivery method you select at checkout.
Is the packaging discreet?
Yes. All NowPatient orders are shipped in plain, unmarked packaging with no branding or indication of the contents on the outside. The packaging is suitable for delivery to your home, workplace, or a neighbour.
Will my parcel require a signature?
Yes. All UK orders are sent via Royal Mail Tracked 24 & Signed, which requires a signature upon delivery. Controlled drug deliveries will always require a signature regardless of the shipping method. For cold-chain deliveries, a signature is required to ensure someone is available to receive the medication promptly and maintain product integrity. For European and worldwide orders, signature requirements may vary depending on the destination country and the service available.
How do I contact NowPatient about a delivery issue?
You can reach our customer care team through the NowPatient website or app. Go to your account and use the Help or Contact Us section to raise a query. Our team is available to assist with any delivery-related concerns including missing parcels, tracking queries, or delivery address changes.
What are NowPatient's customer care hours?
Please visit the Contact Us section of the NowPatient website or app for up-to-date information on our customer care operating hours and available contact methods.
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