Dexamethasone 4 mg

Category- Allopathy

Medicine Highlights

Dexamethasone Uses

Dexamethasone 4 mg is an oral medicine belonging to the category of corticosteroids and is used for the following indications: 

1. Inflammatory bowel disease. 
2. Severe allergies  
3. Asthma and chronic obstructive pulmonary disease (COPD) 
4. Eczema, psoriasis, dermatitis (skin conditions) 
5. Autoimmune diseases Lupus, rheumatoid arthritis, inflammatory bowel disease (Autoimmune diseases) 
6. Leukemia, lymphoma, multiple myeloma (cancer) 
7. Brain swelling (cerebral edema) and spinal cord compression 
8. COVID‑19 complications (severe cases needing oxygen or ventilation) 
9. Prevention of nausea and vomiting after chemotherapy         

Dexamethasone side effects 

More Common  

1. Aggression  
2. Agitation  
3. Anxiety  
4. Blurred vision  
5. Decrease in the amount of urine  
6. Dizziness  
7. Fast, slow, pounding, or irregular heartbeat or pulse  
8. Headache  
9. Irritability             

Less Common 

1. Mood changes (depression, euphoria, irritability)  
2. Vision problems (blurred vision, cataracts, glaucoma) 
3. Unusual bleeding or bruising 
4. Slow wound healing 
5. Muscle weakness or wasting 
6. Irregular heartbeat or palpitations 
7. Swelling of face or limbs (edema) 
8. Menstrual irregularities 
9. Skin thinning or easy tearing 
10. Seizures (rare but reported) 
11. Severe stomach pain or black/tarry stools (possible ulcer or bleeding) 
12. Signs of infection (fever, sore throat, persistent cough)         

How Dexamethasone works 

Dexamethasone works by reducing the release of chemicals in the body that cause swelling, redness, pain, and allergic reactions. As a result, it helps reduce inflammation, calm the immune response, and relieve symptoms in many conditions such as allergies, asthma, arthritis, and other inflammatory disorders. 

Safety Measures and Warning 

Allergy or Hypersensitivity

If you are allergic to dexamethasone or any ingredient in the medicine, you should avoid it because it can cause serious allergic reactions like rash, itching, swelling, or breathing problems.

Glaucoma / Cataract / Eye Herpes Infection

If you have glaucoma, cataract, or herpes infection in the eye, tell your doctor before taking dexamethasone because steroids can worsen eye pressure, affect vision, or worsen certain eye infections.

Tuberculosis (TB)

If you have TB or a history of TB, tell your doctor before taking dexamethasone. This medicine can reactivate or worsen TB because it lowers the body’s immune response.  

Stomach Ulcer / Gastritis / Intestinal Problems

If you have a stomach ulcer, severe acidity, bleeding in the stomach, or bowel problems, take this medicine carefully because dexamethasone may irritate the stomach and increase the risk of ulcers or bleeding, especially if taken with painkillers like ibuprofen or aspirin. 

Diabetes (High Blood Sugar)

If you have diabetes, use this medicine only with doctor’s advice because dexamethasone can raise blood sugar levels and may make diabetes harder to control. 

High Blood Pressure / Heart Disease / Heart Failure

If you have high BP, heart disease, or heart failure, communicate with your doctor about your condition because this medicine may increase blood pressure and worsen swelling or heart problems. 

Liver or kidney disease

If you have liver disease or kidney disease, tell your doctor before taking dexamethasone because this medicine may need careful monitoring and can sometimes make these conditions harder to manage. 

Pregnancy

Dexamethasone is usually avoided in pregnancy unless clearly needed, but it may be given to help premature babies’ lungs mature. Since it crosses the placenta more than other steroids, it can pose risks to the fetus, so they need to inform the doctor about the condition.

Breastfeeding

Dexamethasone can pass into breast milk, so it is usually avoided unless clearly needed. Short courses at low doses are less risky, but prolonged use may affect the baby, so always meet a doctor before taking it while breastfeeding

Dexamethasone Interaction with Food Product 

Do not take grapefruit or drink grapefruit juice while taking dexamethasone unless your doctor says it is safe, because it may increase the chance of side effects. Dexamethasone should be taken after food or milk to help prevent stomach upset, and it is better to avoid taking it on an empty stomach. Also, avoid alcohol, as it can irritate the stomach and increase the risk of stomach problems. 

Dexamethasone Interaction with Other Medicines  

Avoid taking Dexamethasone with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal:

Dexamethasone Chemical Structure

IUPAC (International Union of Pure and Applied Chemistry)/ Chemical name

Dexamethasone:  (8S,9R,10S,11S,13S,14S,16R,17R)-9-fluoro-11,17-dihydroxy-17-(2-hydroxyacetyl)-10,13,16-trimethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one 

Intake routine/cycle

Daily dose

Take Dexamethasone exactly as your doctor recommends. The dose may change based on your condition and how well you respond. Do not take more than prescribed without consulting your doctor.

Missed Dose

If you forget to take your medicine, take the medication as soon as you remember. If it’s nearly time for your next dose, skip the missed one and continue with your regular schedule. Always consult the doctor before making any changes to your dosage.

Overdose

It is not recommended to take more than 10 mg of dexamethasone per day, as it may cause severe overdosing effects like liver damage, infections, pancreatitis, muscle problems, nausea, and muscle problems. If you face any of the severe effects, meet the doctor. 

Storage

1. Store the medicine at room temperature. 
2. Keep away from sunlight and moisture. 
3. Keep out of reach of children. 

Directions for use 

1. Take this medicine exactly as prescribed by your doctor, at the same time each day. 
2. Do not stop taking this medicine without your doctor’s approval, even if you feel better. 
3. If you forget to take this medicine, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose.  

Dexamethasone Summary 

Dexamethasone 4 mg is a powerful corticosteroid (glucocorticoid) medicine used to reduce inflammation and suppress the immune system. It is commonly prescribed for arthritis, asthma, severe allergies, skin conditions, bowel disorders, certain cancers, and to manage COVID‑19 symptoms. It works by mimicking natural hormones to block inflammatory chemicals and calm an overactive immune response. Typical side effects include weight gain, mood changes, insomnia, high blood sugar, and increased infection risk. Food does not greatly affect absorption, but alcohol and high-sodium diets can worsen side effects like fluid retention and blood pressure.

Taking more than 10 mg of this medicine can cause overdosing effects like severe infections, stomach bleeding, dangerously high blood sugar, and psychiatric disturbances. People with uncontrolled infections, stomach ulcers, severe diabetes, osteoporosis, or known allergies to corticosteroids should avoid it. 

FAQ’s

What are the uses of dexamethasone tablets? 

Dexamethasone tablets are used to treat inflammation, allergies, asthma, autoimmune diseases, certain cancers, and severe COVID‑19 complications. They work by calming the immune system and reducing swelling, pain, and overactive immune responses. 

What is the drug class of dexamethasone? 

Dexamethasone belongs to the drug class called corticosteroids, specifically glucocorticoids, which are medicines that reduce inflammation and suppress the immune system.

What are the side effects of dexamethasone? 

Dexamethasone can cause both common and serious side effects, ranging from weight gain and mood changes to vision problems and increased infection risk. Long‑term or high‑dose use raises the chance of severe complications, so medical supervision is essential. 

Reference 

1. National Center for Biotechnology Information. Dexamethasone. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025. Available from. 
2. Drugs.com. Dexamethasone: Uses, Dosage, Side Effects [Internet]. Drugs.com; 2025 [cited 2026 Jan 15]. Available from. 
3. Mayo Clinic. Dexamethasone (oral route): Description and Side Effects [Internet]. Rochester (MN): Mayo Foundation for Medical Education and Research; 2025 [cited 2026 Jan 15]. Available from. 
4. National Center for Biotechnology Information. PubChem Compound Summary for CID 5743, Dexamethasone [Internet]. Bethesda (MD): National Library of Medicine; 2025 [cited 2026 Jan 15]. Available from. 

Pranathi Chintaluri

Pranathi is a final year Pharm D student at Chalapathi Institute of Pharmaceutical Sciences. She loves learning and applying her knowledge in pharmacy and has a passion for writing, which allows her to express ideas clearly and creatively. She enjoys combining her technical skills with her love for writing and communication to make a meaningful impact. Currently she is working on a research paper about “Consanguineous marriages and its impact on children’s health” which will be published by the end of 2025.