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Buy Phoslo Online
(Calcium Acetate)

What is Phoslo?

What is Phoslo?

Phoslo (calcium acetate) is a brand-name prescription medication used to treat hyperphosphatemia (high levels of phosphorus). It lowers phosphorus levels in people with end-stage kidney disease, also known as end-stage renal failure. It is available in two dosage forms: oral tablets and gel capsules.

Order Phoslo online today and save!

Purchase Phoslo from Universal Drugstore today and save!

Select your dosage:

  • All Strength's
  • 667mg

brand Versions

Sorry, we don't currently have a brand option for this item.

Please see generic options below.

Calcium Acetate (generic Phoslo)

What are generics?

Calcium Acetate 
667mg

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Product of Turkey

Product of Turkey

Marketed as Phos-out in Turkey.

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Important information about Phoslo

The active ingredient in Phoslo is calcium acetate. Calcium acetate is a phosphate binder, and its pharmacology is that it works by attaching to dietary phosphorus in the gut, which decreases the absorption of phosphorus. This lowers serum phosphate levels.

Follow all directions given to you by your doctor and read all documents provided, including the full Prescribing Information, FDA-Approved Product Labeling, Instructions for Use, and Medication Guide before using Phoslo. However, the following is a synopsis of the general guidelines for the use of Phoslo:

  • The recommended initial dose of Phoslo is 2 tablets with each meal. The dose can increase to 3 to 4 tablets with each meal, depending on the patient. Follow the directions from your healthcare provider.
  • Swallow the Phoslo tablets and gelcaps whole. Do not crush, chew, or split.
  • It’s important to get your serum phosphate and calcium levels checked to ensure the medication is working correctly and to prevent adverse effects.

Some mild or common side effects of Phoslo seen in clinical trials as compared to placebo include:

  • Nausea
  • Vomiting
  • Mild hypercalcemia

Some individuals may experience serious side effects while using Phoslo. These side effects may require immediate medical attention. If you experience any of the following, contact your healthcare provider or seek emergency medical help:

  • Allergic reactions. Signs include skin rash, hives, nausea, vomiting, and swelling of the face, lips, or tongue.
  • Severe hypercalcemia (high calcium levels). Signs include tiredness, constipation, muscle weakness, bone pain, soft-tissue calcification, and abnormal heart rhythm.

These are not all of the possible side effects of Phoslo. You should always seek medical advice from your healthcare provider for any questions or concerns about your medical condition or treatment. Read all patient information, medication guides, or drug information sheets that come with this medication. You can also report adverse effects to the Food and Drug Administration at www.fda.gov/medwatch or 1-800-FDA-1088.

Before starting Phoslo, it is crucial to discuss any existing health conditions with your healthcare provider. You should be sure that your healthcare provider is aware of all your medical conditions, including if you have:

  • Hypercalcemia

Allergic reaction to any ingredient in Phoslo

Phoslo will start working in a couple days to lower serum phosphate levels. Regular bloodwork will be done to check the levels.

When Phoslo is taken with other prescription drugs, over-the-counter medications, vitamins, and supplements, it may change how they work or increase the frequency or severity of side effects. Make sure that you tell your healthcare professional about anything that you are taking to avoid any negative drug interactions, including:

  • HIV medications like dolutegravir and elvitegravir
  • Tetracycline and quinolone antibiotics like ciprofloxacin, levofloxacin, doxycycline, omadacycline, and minocycline
  • Levothyroxine
  • Heart medications like sotalol, digoxin, and thiazide diuretics (water pills)

Phoslo is available in 667 mg tablets and gelcaps.

Store Phoslo at room temperature, out of reach of children and pets.

Fresenius Medical Care manufactured Phoslo, but it has been discontinued.

Yes, there are generic versions of Phoslo. The generic name is calcium acetate.

Do not stop taking Phoslo without consulting your healthcare provider.

It is not known if Phoslo is safe in pregnancy. Talk to your doctor if you are already pregnant or if you have any plans to become pregnant. They will know or recommend what is best for you.

Phoslo (calcium acetate) is present in breast milk. Talk to your doctor if you are already breastfeeding or if you have any plans to breastfeed. They will know or recommend what is best for you.

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Important information about buying Phoslo from UniversalDrugstore™

Once you complete your order, we process, verify, and dispatch your medication. You’ll receive email updates at each stage, including tracking details once your order ships. If any additional documentation is needed (such as a valid prescription), we’ll contact you promptly. Once approved, your order is charged and delivered directly to your doorstep.

Orders are typically processed within 1–3 business days once all required documents are received and approved. Standard delivery times range from 10–18 business days, depending on your location.

Yes! Once your medication ships, you will receive an email with tracking information so you can monitor your shipment every step of the way.

Our Customer Care team is available 24/7 to assist with any order-related concerns or questions. If you experience delays, missing items, or need support, contact us using the details provided in your confirmation email.

All orders are shipped in discreet, plain packaging to protect your privacy. Medications are securely packaged to prevent damage and ensure they arrive in top condition.

Yes. We use cold-chain shipping methods to safely transport temperature-sensitive medications, ensuring they maintain proper storage conditions throughout delivery.

Shipping costs vary depending on your location and shipping method. Free shipping promotions may be available—check the checkout page for the latest offers. Orders above $100 going to a US destination will receive free shipping.

Currently, we do not bill Medicare or Medicaid directly. However, we provide detailed receipts and documentation that you can submit to your insurance provider for potential reimbursement.

Universal Drugstore does not bill private health insurance directly, but we provide a detailed invoice that you can submit to your insurer for possible reimbursement. Many insurers will accept Universal Drugstore’s documents, but if you have any questions, check with your insurance company prior to purchasing.

We use advanced SSL encryption and secure payment processing to ensure that all transactions are 100% protected against fraud and unauthorized access.

Universal Drugstore offers many generic alternatives that provide the same active ingredients at a lower cost. Search for your medication and compare pricing for generic vs. brand-name options. Generic availability depends on the medication.

If your medication requires a prescription, you must upload it online, via email, or fax. Over-the-counter (OTC) medications do not require a prescription. All prescription medication purchases require a valid and approved prescription. The Universal Drugstore customer care team can contact your doctor directly to get your prescription, and ensure all information is up to date.

Yes! You can add multiple medications to your cart, including prescription, OTC, and pet medications, and complete your purchase in a single checkout process.

Yes! If your prescription includes refills, you can reorder quickly by logging into your account and selecting your medication for a hassle-free refill process. Always refill your medication proactively and ontime, to ensure you do not run out of important medication.

Yes! We offer:

  • Up to 80% savings on medications
  • Price match guarantee – we’ll match competitor pricing on qualifying medications
  • 10% off your first order for new customers

We offer 24/7 customer support via phone, email, and chat. Visit our Contact Us page for assistance with ordering, shipping, or medication questions.

Medical Disclaimer

The information, including but not limited to, text, graphics, images and other material contained on this website are for informational purposes to increase health awareness only. No material on this site is intended to be a substitute for professional medical advice, diagnosis or treatment. 



Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition or treatment and before undertaking a new health care regimen, and never disregard professional medical advice or delay in seeking it because of something you have read on this website.