Infed

Primary Uses

Infed is primarily used to treat iron deficiency anemia, a condition where the body does not have enough iron to produce healthy red blood cells. It is typically prescribed when iron levels need to be replenished but oral iron therapy is not suitable.

When Infed is Prescribed

Healthcare providers may prescribe Infed in the following situations:

• Oral Iron Intolerance: When a patient cannot tolerate the side effects of iron pills, such as severe stomach upset or constipation.
• Ineffective Oral Treatment: When iron supplements taken by mouth do not sufficiently increase iron levels or red blood cell counts.
• Absorption Issues: When a patient has a medical condition that prevents the digestive system from properly absorbing iron from food or supplements.
• Need for Rapid Replenishment: When iron stores need to be restored more quickly than oral supplements allow.

Infed is intended only for the treatment of documented iron deficiency and is not used for other types of anemia that are not caused by a lack of iron.

How Infed Functions in the Body

Iron is a vital mineral required for the production of hemoglobin. Hemoglobin is the protein within red blood cells that binds to oxygen in the lungs and transports it throughout the body. When iron levels are too low, the body cannot produce enough healthy red blood cells, leading to a condition called iron deficiency anemia.

Infed is a complex of iron and dextran. When administered by injection or infusion, the body processes this complex to make the iron available for use. The mechanism involves the following steps:

• Release of Iron: After injection, cells in the body's immune and storage systems (primarily in the liver, spleen, and bone marrow) gradually break down the iron-dextran complex.
• Transport: The released iron binds to a transport protein called transferrin.
• Utilization: Transferrin carries the iron to the bone marrow, where it is incorporated into new hemoglobin molecules to create red blood cells.
• Storage: Any iron not immediately used for red blood cell production is stored in the liver and other tissues for future use.

By replenishing iron stores and supporting the creation of new red blood cells, Infed helps improve the blood's ability to carry oxygen, which addresses the underlying cause of iron deficiency anemia.

Common Side Effects

• Nausea, vomiting, or stomach pain
• Diarrhea or constipation
• Headache or dizziness
• Muscle or joint pain
• Flushing, shivering, or fever
• Itching or rash
• Soreness, swelling, or skin discoloration at the injection site

Serious Side Effects

Contact a healthcare provider immediately if you experience:

• Difficulty breathing or wheezing
• Swelling of the face, lips, tongue, or throat
• Chest pain
• Fast or irregular heartbeat
• Fainting or severe dizziness
• Seizures

In some cases, symptoms like joint pain, chills, or fever may be delayed and occur one to two days after the injection.

Severe Allergic Reactions

Infed has been associated with life-threatening anaphylactic-type reactions. These reactions can occur even if a patient has tolerated previous doses. Because of this risk, a small test dose is required before the first full therapeutic dose is administered. Medical personnel must observe patients for signs of a reaction during and after the injection.

Administration should only take place in a setting where resuscitation equipment and trained staff are immediately available to treat severe allergic emergencies.

Contraindications

Infed is not appropriate for everyone. It should not be used in the following situations:

• Known hypersensitivity to iron dextran or any of its components.
• Anemia that is not caused by iron deficiency, such as hemolytic anemia.
• Evidence of iron overload, including conditions like hemosiderosis or hemochromatosis.

Delayed Reactions

Some patients may experience delayed hypersensitivity reactions, typically occurring 24 to 48 hours after administration. Symptoms may include:

• Joint and muscle pain.
• Fever and chills.
• Headache and dizziness.
• Nausea and vomiting.

Other Precautions

Caution is advised for individuals with a history of significant allergies or asthma, as they may be at a higher risk for adverse reactions. Patients with impaired liver function or active infections should also be monitored closely. Excessive iron administration can lead to iron overload; therefore, regular blood tests are necessary to monitor iron levels and prevent toxicity. The use of Infed during pregnancy or breastfeeding should only occur if the potential benefit justifies the potential risk to the fetus or infant.

Pregnancy

There are no adequate and well-controlled studies of Infed in pregnant women. Research in animals has shown that iron dextran may cause birth defects or fetal death when administered at doses higher than those typically used in humans. Because of these findings, Infed should only be used during pregnancy if a healthcare provider determines the benefit to the mother justifies the potential risk to the developing baby.

A significant concern during pregnancy is the risk of severe allergic reactions, known as anaphylaxis, in the mother. If a severe reaction occurs, it can lead to dangerously low blood pressure in the mother, which may cause fetal distress or a slow heart rate in the fetus.

Breastfeeding

Small amounts of unmetabolized iron dextran are known to pass into human breast milk. It is not fully understood how this may affect a nursing infant. Women who are breastfeeding should discuss the potential risks and benefits with their healthcare provider before receiving this medication to determine the best course of action.

Available Forms

Infed is supplied as a sterile liquid solution for parenteral use. It is available in single-dose vials.

This medication is administered by a healthcare professional in a clinical setting through the following routes:

• Intravenous (IV): Administered as a bolus injection or a diluted infusion into a vein.
• Intramuscular (IM): Administered as an injection into a large muscle mass.

FDA Approval and Indications

Infed is approved by the U.S. Food and Drug Administration (FDA) for the treatment of iron deficiency anemia. It is specifically indicated for patients who cannot tolerate oral iron therapy or for whom oral iron has been ineffective. It is used to replenish iron stores in the body when oral supplements are not an option.

Boxed Warning

The FDA has issued a boxed warning for Infed because of the risk of severe and potentially fatal anaphylactic-type reactions. These reactions can occur even if a patient has tolerated previous doses. Because of this risk, the FDA requires the following safety measures:

• A small test dose must be administered before the first full therapeutic dose.
• Patients must be observed for signs of a reaction during and after the injection.
• Medical personnel and equipment for emergency resuscitation must be immediately available during administration.

Safety Communications

The FDA has previously updated prescribing information to strengthen warnings regarding the risk of serious hypersensitivity reactions. Healthcare providers are advised to monitor patients closely for at least 30 minutes following the administration of iron dextran. While these reactions are rare, the FDA emphasizes that they can be life-threatening and require immediate medical intervention.

Overview of Infed Injection

Infed is an iron replacement product used to treat iron deficiency anemia. It is typically reserved for situations where oral iron supplements are not an option, such as when a patient cannot tolerate the side effects of oral iron or when the body cannot absorb iron through the digestive tract effectively.

Administration Methods

Infed is administered by a healthcare professional in a clinical setting. It can be given in two ways:

• Intravenous (IV): The medication is injected directly into a vein, either as a slow injection or as an infusion mixed with saline.
• Intramuscular (IM): The medication is injected deep into the muscle of the buttock. A specific technique called the Z-track method is used to prevent the medication from leaking and causing permanent staining of the skin.

Safety and Monitoring

Because of the risk of severe allergic reactions, specific safety protocols are followed during administration:

• Test Dose: Before receiving the first full therapeutic dose, patients must receive a small test dose to check for hypersensitivity.
• Observation: Patients are monitored closely by medical staff during the injection and for at least one hour afterward.
• Emergency Readiness: Treatment is only administered in facilities where emergency equipment and medications are available to treat life-threatening allergic reactions (anaphylaxis).

The dosage of Infed is individualized, calculated based on the patient's body weight and hemoglobin levels to ensure the correct amount of iron is replaced.