Solu-Medrol 500mg Inj, 1vial

Manufacturer PFIZER Active Ingredient Methylprednisolone Injection(meth il pred NIS oh lone) Pronunciation METH-il-pred-NIS-oh-lone
It is used for many health problems like allergy signs, asthma, adrenal gland problems, blood problems, skin rashes, or swelling problems. This is not a list of all health problems that this drug may be used for. Talk with the doctor.
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Drug Class
Corticosteroid
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Pharmacologic Class
Glucocorticoid Receptor Agonist
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Pregnancy Category
Category C
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FDA Approved
Jan 1959
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DEA Schedule
Not Controlled

Overview

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What is this medicine?

Methylprednisolone is a powerful medicine that belongs to a class of drugs called corticosteroids. It works by reducing inflammation (swelling and irritation) and suppressing the immune system. It's used to treat many conditions like severe allergies, asthma, arthritis, skin conditions, and certain cancers.
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How to Use This Medicine

To use this medication correctly, follow your doctor's instructions and carefully read all accompanying information. Take this medication exactly as directed, and adhere to all guidelines provided. This medication is administered via injection.

If you need to store this medication at home, consult with your doctor, nurse, or pharmacist to determine the proper storage procedure.

If you miss a dose, contact your doctor promptly to receive guidance on the appropriate course of action.
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Lifestyle & Tips

  • Avoid contact with people who are sick or have infections, as this medication can weaken your immune system.
  • Report any signs of infection (fever, chills, sore throat) immediately.
  • Follow a diet low in sodium and high in potassium to help manage fluid retention and electrolyte imbalances.
  • Ensure adequate calcium and vitamin D intake, especially with long-term use, to protect bone health.
  • Do not stop this medication suddenly, especially after prolonged use, as it can lead to withdrawal symptoms. Your doctor will guide you on how to slowly reduce the dose.
  • Carry a steroid identification card if on long-term therapy, especially if you have adrenal insufficiency.

Dosing & Administration

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Adult Dosing

Standard Dose: Highly variable depending on indication. For acute severe conditions, e.g., 10-40 mg IV/IM daily, or pulse therapy 250-1000 mg IV daily for 3-5 days.
Dose Range: 10 - 1000 mg

Condition-Specific Dosing:

Acute Asthma Exacerbation: 40-80 mg IV/IM daily in 1-2 divided doses until PEF > 70% predicted, then taper.
Multiple Sclerosis Exacerbation: 500-1000 mg IV daily for 3-5 days.
Severe Allergic Reactions: 125 mg IV/IM initially, then 40 mg IV/IM every 6 hours as needed.
Spinal Cord Injury (acute): 30 mg/kg IV bolus over 15 minutes, followed by 5.4 mg/kg/hr IV infusion for 23 hours (within 8 hours of injury).
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Pediatric Dosing

Neonatal: Not established for routine use; use with caution. Dosing highly individualized for specific conditions (e.g., bronchopulmonary dysplasia).
Infant: Highly individualized. Anti-inflammatory/immunosuppressive: 0.5-1.7 mg/kg/day IV/IM in divided doses. Acute severe conditions: 1-4 mg/kg/day IV/IM.
Child: Highly individualized. Anti-inflammatory/immunosuppressive: 0.5-1.7 mg/kg/day IV/IM in divided doses. Acute severe conditions: 1-4 mg/kg/day IV/IM.
Adolescent: Dosing similar to adult for many indications, but based on weight for some conditions (e.g., 0.5-1.7 mg/kg/day IV/IM).
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Dose Adjustments

Renal Impairment:

Mild: No adjustment needed.
Moderate: No adjustment needed.
Severe: No adjustment needed.
Dialysis: Not significantly dialyzable; no supplemental dose needed after dialysis.

Hepatic Impairment:

Mild: No specific adjustment recommended, but monitor for increased effects due to decreased metabolism.
Moderate: Consider dose reduction and monitor for increased effects due to decreased metabolism.
Severe: Consider significant dose reduction and close monitoring due to markedly decreased metabolism.

Pharmacology

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Mechanism of Action

Methylprednisolone is a synthetic glucocorticoid that binds to intracellular glucocorticoid receptors, forming a complex that translocates to the nucleus. This complex modulates gene expression, leading to the synthesis of anti-inflammatory proteins (e.g., lipocortins) and inhibition of pro-inflammatory mediators (e.g., cytokines, chemokines, prostaglandins, leukotrienes). It suppresses immune responses by inhibiting leukocyte migration, reducing capillary permeability, and stabilizing lysosomal membranes.
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Pharmacokinetics

Absorption:

Bioavailability: 100% (IV); Variable (IM, depending on ester form, e.g., acetate is slowly absorbed)
Tmax: IV: Immediate; IM (succinate): 0.5-1 hour; IM (acetate): 4-8 hours
FoodEffect: Not applicable for injection.

Distribution:

Vd: 0.7-1.5 L/kg
ProteinBinding: Approximately 77% (primarily to albumin and corticosteroid-binding globulin)
CnssPenetration: Yes (limited, but sufficient to exert CNS effects)

Elimination:

HalfLife: Biological half-life: 18-36 hours; Plasma half-life: 2-3 hours
Clearance: 0.3-0.6 L/hr/kg
ExcretionRoute: Urine (primarily as inactive metabolites)
Unchanged: < 5%
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Pharmacodynamics

OnsetOfAction: IV: Rapid (within minutes to hours); IM: 1-2 hours (succinate), 4-8 hours (acetate)
PeakEffect: IV: 1-2 hours; IM: 4-12 hours
DurationOfAction: IV: 24-36 hours (pharmacologic effect); IM: 1-4 weeks (acetate), 1-2 days (succinate)

Safety & Warnings

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Side Effects

Urgent Side Effects: Seek Medical Help Right Away

Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor immediately or seek emergency medical attention:

Signs of an allergic reaction: rash, hives, itching, redness, swelling, blistering, or peeling skin (with or without fever), wheezing, tightness in the chest or throat, difficulty breathing, swallowing, or speaking, unusual hoarseness, or swelling of the mouth, face, lips, tongue, or throat
Signs of infection: fever, chills, severe sore throat, ear or sinus pain, cough, increased or discolored sputum, painful urination, mouth sores, or a wound that won't heal
Signs of high blood sugar: confusion, drowsiness, excessive thirst or hunger, frequent urination, flushing, rapid breathing, or fruity-smelling breath
Signs of Cushing's syndrome: weight gain in the upper back or abdomen, moon face, severe headache, or slow wound healing
Signs of adrenal gland problems: severe nausea or vomiting, severe dizziness or fainting, muscle weakness, fatigue, mood changes, decreased appetite, or weight loss
Signs of low potassium levels: muscle pain or weakness, muscle cramps, or an irregular heartbeat
Signs of pancreatitis: severe abdominal pain, severe back pain, or severe nausea and vomiting
Signs of high blood pressure: severe headache, dizziness, fainting, or changes in vision
Skin changes: acne, stretch marks, slow healing, or excessive hair growth
Purple, red, blue, brown, or black bumps or patches on the skin or in the mouth
Chest pain or pressure
Abnormal heartbeat (fast, slow, or irregular)
Changes in menstrual periods
Bone or joint pain
Changes in vision
New or worsening mental, mood, or behavioral changes
Seizures
Unusual burning, numbness, or tingling sensations
Unexplained bruising or bleeding
Severe abdominal pain
Black, tarry, or bloody stools
Vomiting blood or coffee ground-like material
New or worsening muscle weakness
Fluid retention, swelling, weight gain, or breathing difficulties

Other Possible Side Effects

Like all medications, this drug can cause side effects. While many people may not experience any side effects or only minor ones, it's essential to discuss any concerns with your doctor. If you experience any of the following side effects or any other unusual symptoms, contact your doctor for advice:

Mild stomach upset or nausea
Difficulty sleeping
Restlessness
Excessive sweating
* Headache

This is not an exhaustive list of possible side effects. If you have questions or concerns, consult your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
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Seek Immediate Medical Attention If You Experience:

  • Fever, chills, body aches, flu symptoms (signs of infection)
  • Unusual bruising or bleeding
  • Swelling in your hands or feet, rapid weight gain
  • Muscle weakness or pain
  • Severe stomach pain, black/tarry stools, vomiting blood
  • Vision problems (blurred vision, eye pain)
  • Mood changes (severe depression, euphoria, anxiety, insomnia)
  • Increased thirst or urination (signs of high blood sugar)
  • Shortness of breath
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Before Using This Medicine

Before Taking This Medication: Important Information to Share with Your Doctor

To ensure safe treatment, inform your doctor of the following:

Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Describe the allergic reactions you've experienced.
The presence of any infections, including bacterial, viral, or fungal infections, as well as specific conditions like:
+ Amoeba infection (e.g., traveler's diarrhea)
+ Herpes infection of the eye
+ Malaria infection in the brain
+ Threadworm infestation
+ Any other type of infection
If you have nerve problems affecting your eyes

Additional Considerations for Injection Administration (Intramuscular):

If you have idiopathic thrombocytopenic purpura (ITP), a condition affecting platelet count

It is crucial to disclose all your medications, including prescription and over-the-counter drugs, natural products, and vitamins, as well as any health issues, to your doctor and pharmacist. This information will help determine the safety of taking this medication with your other treatments and health conditions. Never start, stop, or adjust the dosage of any medication without first consulting your doctor.
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Precautions & Cautions

Tell all of your health care providers that you take this drug. This includes your doctors, nurses, pharmacists, and dentists.Have your blood work, body weight, and other lab tests checked as you have been told if you take this drug for a long time. You may also need to have your eye pressure and bone density checked.High blood pressure has happened with drugs like this one. Have your blood pressure checked as you have been told by your doctor.This drug may affect allergy skin tests. Be sure your doctor and lab workers know you take this drug.Long-term use may raise the chance of cataracts or glaucoma. Talk with the doctor.This drug may cause weak bones (osteoporosis) with long- term use. Talk with your doctor to see if you have a higher chance of weak bones or if you have any questions.You may need to lower how much salt is in your diet and take extra potassium. Talk with your doctor.If you have high blood sugar (diabetes), you will need to watch your blood sugar closely.Talk with your doctor before you drink alcohol.Talk with your doctor before getting any vaccines. Use of some vaccines with this drug may either raise the chance of an infection or make the vaccine not work as well.Chickenpox and measles can be very bad or even deadly in some people taking steroid drugs like this drug. Avoid being near anyone with chickenpox or measles if you have not had these health problems before. If you have been exposed to chickenpox or measles, talk with your doctor. Steroid drugs, including this one, raise the risk of infection. They can cause an active infection to get worse. They can also make some signs of infection harder to notice. Infections that happen with steroids can be mild, but they can also be severe and even deadly. The risk of problems from these infections is usually raised with higher doses of steroids. Wash hands often. Stay away from people with infections, colds, or flu. Tell your doctor if you have any signs of an infection.Some infections may become active again in patients taking drugs like this one. This includes tuberculosis and hepatitis B. Tell your doctor if you have ever had one of these infections.This drug lowers how much natural steroid your body makes. Tell your doctor if you have fever, infection, surgery, or injury. Your body's normal response to these stresses may be affected. You may need extra doses of steroid.Do not stop taking this drug all of a sudden without calling your doctor. You may have a greater risk of side effects. If you need to stop this drug, you will want to slowly stop it as ordered by your doctor.Very bad health problems have happened when drugs like this one have been given into the spine (epidural). These include paralysis, loss of eyesight, stroke, and sometimes death. It is not known if drugs like this one are safe and effective when given into the spine. These drugs are not approved for this use. Talk with the doctor.Some products have benzyl alcohol. If possible, avoid products with benzyl alcohol in newborns or infants. Serious side effects can happen in these children with some doses of benzyl alcohol, including if given with other drugs that have benzyl alcohol. Talk with the doctor to see if this product has benzyl alcohol in it.Tell your doctor if you have missed a dose or recently stopped this drug and you feel very tired, weak, or shaky, or have a fast heartbeat, confusion, sweating, or dizziness.A type of cancer (Kaposi's sarcoma) has happened in people taking drugs like this one for a long time. Talk with the doctor. Patients with cancer may be at greater risk of getting a bad and sometimes deadly health problem called tumor lysis syndrome (TLS). Talk with the doctor.If you are 65 or older, use this drug with care. You could have more side effects.This drug may affect growth in children and teens in some cases. They may need regular growth checks. Talk with the doctor.This drug may lower sperm counts. If you have questions, talk with the doctor.This drug may cause harm to the unborn baby if you take it while you are pregnant. If you are pregnant or you get pregnant while taking this drug, call your doctor right away.Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.If you used this drug when you were pregnant, tell your baby's doctor.
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Overdose Information

Overdose Symptoms:

  • Severe nausea or vomiting
  • Stomach pain
  • Weakness
  • Drowsiness
  • Confusion
  • Mood changes
  • Fluid retention (swelling)
  • High blood pressure
  • High blood sugar

What to Do:

Seek immediate medical attention or call Poison Control at 1-800-222-1222. Treatment is generally supportive and symptomatic.

Drug Interactions

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Major Interactions

  • Live or live attenuated vaccines (risk of severe infection)
  • CYP3A4 inducers (e.g., rifampin, phenytoin, barbiturates) - decreased methylprednisolone efficacy
  • CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, clarithromycin, ritonavir, grapefruit juice) - increased methylprednisolone effects/toxicity
  • Anticoagulants (e.g., warfarin) - altered anticoagulant effect (increased or decreased)
  • NSAIDs (e.g., ibuprofen, naproxen) - increased risk of GI ulceration/bleeding
  • Diuretics (loop and thiazide) - enhanced potassium depletion, increased risk of hypokalemia
  • Digoxin - increased risk of digitalis toxicity due to hypokalemia
  • Antidiabetic agents (e.g., insulin, oral hypoglycemics) - increased blood glucose, requiring dose adjustment of antidiabetic agents
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Moderate Interactions

  • Cholestyramine - decreased absorption of methylprednisolone
  • Cyclosporine - increased plasma concentrations of both drugs, increased risk of seizures
  • Neuromuscular blocking agents (e.g., pancuronium, vecuronium) - prolonged neuromuscular blockade
  • Oral contraceptives/estrogens - increased methylprednisolone effects
  • Aspirin (high dose) - decreased salicylate levels, increased risk of GI side effects
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Minor Interactions

  • Antacids - may decrease absorption (if oral form used)

Monitoring

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Baseline Monitoring

Blood Pressure

Rationale: Corticosteroids can cause hypertension.

Timing: Prior to initiation.

Serum Glucose

Rationale: Corticosteroids can induce hyperglycemia.

Timing: Prior to initiation.

Serum Electrolytes (Na, K)

Rationale: Corticosteroids can cause sodium retention and potassium depletion.

Timing: Prior to initiation.

Weight

Rationale: Fluid retention and weight gain are common side effects.

Timing: Prior to initiation.

Bone Mineral Density (for long-term use)

Rationale: Risk of osteoporosis with prolonged corticosteroid therapy.

Timing: Prior to initiation of therapy > 3 months.

Ophthalmologic Exam (for long-term use)

Rationale: Risk of cataracts and glaucoma with prolonged corticosteroid therapy.

Timing: Prior to initiation of therapy > 6 weeks.

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Routine Monitoring

Blood Pressure

Frequency: Daily to weekly (depending on acuity and duration)

Target: Individualized, aim for patient's baseline or target BP.

Action Threshold: Significant increase from baseline or sustained hypertension.

Serum Glucose

Frequency: Daily to weekly (more frequently in diabetics or high-dose therapy)

Target: Fasting < 126 mg/dL, Postprandial < 180 mg/dL

Action Threshold: Persistent hyperglycemia requiring intervention (e.g., insulin).

Serum Electrolytes (Na, K)

Frequency: Weekly to bi-weekly (especially with high doses or concomitant diuretics)

Target: Na: 135-145 mEq/L, K: 3.5-5.0 mEq/L

Action Threshold: Hypokalemia (<3.5 mEq/L) or significant hypernatremia.

Weight

Frequency: Weekly

Target: Stable or within acceptable limits.

Action Threshold: Significant, rapid weight gain (suggesting fluid retention).

Signs of Infection

Frequency: Daily

Target: Absence of fever, localized pain, redness, swelling.

Action Threshold: Development of fever, chills, new pain, or other signs of infection.

Growth and Development (pediatric)

Frequency: Regularly (e.g., every 3-6 months)

Target: Normal growth velocity for age.

Action Threshold: Growth retardation.

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Symptom Monitoring

  • Signs of infection (fever, chills, sore throat, cough, painful urination)
  • Unusual bruising or bleeding
  • Swelling in ankles or feet
  • Increased thirst or urination
  • Muscle weakness or pain
  • Mood changes (irritability, depression, euphoria)
  • Sleep disturbances
  • Stomach pain, black/tarry stools (GI bleeding)
  • Vision changes
  • Delayed wound healing

Special Patient Groups

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Pregnancy

Use during pregnancy only if the potential benefit justifies the potential risk to the fetus. Animal studies have shown teratogenic effects. Human data are limited but suggest a possible association with oral clefts when used in the first trimester, though this risk is low and not consistently proven.

Trimester-Specific Risks:

First Trimester: Possible increased risk of oral clefts (though data are conflicting and overall risk is low).
Second Trimester: Generally considered safer than first trimester, but monitor for fetal growth restriction.
Third Trimester: Risk of fetal adrenal suppression, requiring monitoring of the neonate for signs of hypoadrenalism.
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Lactation

Methylprednisolone is excreted into breast milk. While generally considered compatible with breastfeeding at low to moderate doses, high doses or prolonged use may pose a risk to the infant (e.g., growth suppression, adrenal suppression). Monitor the infant for adverse effects.

Infant Risk: Low to moderate risk. Consider using the lowest effective dose and administering immediately after a feeding to minimize infant exposure.
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Pediatric Use

Corticosteroids can cause growth retardation in children. Monitor growth and development carefully. Long-term use should be avoided if possible. Children are also more susceptible to some adverse effects like intracranial hypertension.

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Geriatric Use

Elderly patients may be at increased risk for adverse effects such as osteoporosis, fluid retention, hypertension, and diabetes. Use the lowest effective dose for the shortest duration possible. Monitor closely for side effects.

Clinical Information

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Clinical Pearls

  • Methylprednisolone sodium succinate (Solu-Medrol) is suitable for IV and IM administration, offering rapid onset of action.
  • For acute, severe conditions, pulse therapy (e.g., 1000 mg IV daily for 3-5 days) is often used, but requires careful monitoring.
  • Always taper corticosteroids gradually after prolonged therapy to prevent adrenal insufficiency.
  • Patients on long-term corticosteroids should be advised about bone health (calcium, vitamin D, bisphosphonates if indicated) and ophthalmologic exams.
  • Corticosteroids can mask signs of infection; maintain a high index of suspicion for new infections.
  • Administering doses in the morning may help minimize sleep disturbances due to the drug's stimulating effects.
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Alternative Therapies

  • Prednisone (oral)
  • Dexamethasone (oral, IV)
  • Hydrocortisone (oral, IV)
  • Betamethasone (oral, IM)
  • Triamcinolone (oral, IM)
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Cost & Coverage

Average Cost: Not available per vial
Generic Available: Yes
Insurance Coverage: Tier 1 or 2 (generic); Tier 3 or 4 (brand)
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General Drug Facts

If your symptoms or health problems do not improve or worsen over time, it is essential to contact your doctor for further evaluation and guidance. To ensure safe use, never share your medication with others, and do not take medication prescribed to someone else. Store all medications in a secure location, out of reach of children and pets, to prevent accidental ingestion. Properly dispose of unused or expired medications by checking with your pharmacist for guidance on the best disposal method. Unless instructed to do so, avoid flushing medications down the toilet or pouring them down the drain, as this can harm the environment. Many communities offer drug take-back programs, which can be a safe and convenient way to dispose of unwanted medications. Some medications may come with an additional patient information leaflet, so be sure to check with your pharmacist for more information. If you have any questions or concerns about your medication, consult with your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When seeking help, be prepared to provide information about the medication taken, the amount, and the time it was taken, as this will help healthcare providers deliver appropriate care.