Losartan 25 mg is a widely prescribed medication used to manage high blood pressure (hypertension) and heart failure. As an angiotensin receptor blocker (ARB), it works by relaxing blood vessels, making it easier for the heart to pump blood efficiently. This helps reduce the risk of stroke, heart attacks, and kidney damage, especially in patients with diabetes. Regular use of losartan under medical supervision can significantly improve cardiovascular health and lower the long-term risks associated with high blood pressure. 

To get the best results, losartan should be taken daily at the same time, as prescribed by your doctor. It is important to maintain a healthy lifestyle alongside medication, exercising regularly, eating a balanced diet, and avoiding excessive salt intake can further enhance its effectiveness. Patients should also avoid alcohol and smoking, as these can interfere with blood pressure control. If you experience dizziness, weakness, or any unusual side effects, consult your doctor immediately. Proper adherence to losartan therapy can help you achieve stable blood pressure and a healthier heart. 

Losartan 25 mg is an oral medicine belonging to the class of angiotensinogen receptor blocker (ARB) medicines. It is used for following indications: 

1. High blood pressure (Hypertension) 
2. Heart failure 

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

More Common

1. Dizziness 
2. Decreased blood pressure 
3. Hypoglycemia (low blood glucose level) 
4. Increased potassium level in blood 
5. Increased blood urea 

Less Common

1. Body aches or pain 
2. Chills 
3. Continuing ringing or buzzing or other unexplained noise in the ears 
4. Decreased interest in sexual intercourse 
5. Difficulty having a bowel movement (stool) 
6. Ear congestion 
7. Feeling of constant movement of self or surroundings 
8. Feeling sad or empty 
9. Headache, severe and throbbing 
10. Hearing loss 
11. Inability to have or keep an erection 
12. Increased sensitivity of the skin to sunlight 
13. Irritability 
14. Lack of appetite 
15. Loss in sexual ability, desire, drive, or performance 
16. Loss of interest or pleasure 
17. Loss of voice 
18. Redness or other discoloration of the skin 
19. Sensation of spinning 
20. Severe sunburn 
21. Sneezing 
22. Sore throat 
23. Stuffy or runny nose 
24. Trouble concentrating 
25. Trouble sleeping 

Angiotensin is a protein that acts as a key, and the AT1 receptor is the lock. When angiotensin II attaches to the AT1 receptor, it triggers the constriction of smooth blood vessels, leading to hypertension. Losartan acts as a barrier by inhibiting the binding of angiotensin II to the AT1 receptor, thereby reducing blood pressure. 

1- Allergy/Hypersensitivity

If you are allergic to this medicine or experience skin swelling, discontinue its use and consult your doctor immediately.

2- Pregnancy

If you are pregnant or planning to become pregnant, inform your doctor. Taking losartan during pregnancy can reduce amniotic fluid, leading to the risk of the baby being born with underdeveloped lungs.

3- Kidney Disease

If you have kidney disease, inform your doctor, as losartan may worsen kidney function.

Avoid taking losartan 25 mg with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal: 

Alcohol and tobacco should not be taken with this medicine, as they can either decrease or increase its effects. 

1. The medicine should be stored at room temperature  
2. Keep away from sunlight and moisture  
3. Keep away from the reach of children 

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

(2-butyl-4-chloro-1-{[2′-(1H-tetrazol-5-yl)-4-biphenylyl]methyl}-1H-imidazol-5-yl)methanol.   

Daily Dose

Take losartan 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 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

There is no specific dose of losartan identified as causing an overdose. However, symptoms such as abdominal pain, severe low blood pressure (hypotension), dizziness, or fainting may occur. If you know someone who is taking losartan, and has these symptoms then take them to hospital immediately.

A few modifications in your diet and lifestyle can significantly help manage your blood pressure, to the point where your doctor may determine that medication is no longer necessary. Here are some dietary changes and lifestyle practices that can help you manage your blood pressure: 

1- Lose Weight

Weight gain is directly linked to higher blood pressure. If you’re overweight or obese, losing weight can help lower your blood pressure. Pay attention to the weight around your waistline as well, excess weight in this area can be a significant risk factor for high blood pressure.

2- Regular Exercise

Exercise can lower your blood pressure by 5 to 8 mm Hg. Engaging in 30 minutes of physical activity daily can significantly help reduce your blood pressure. Activities like walking, jogging, cycling, swimming, and dancing are all effective in keeping your blood pressure under control.

3- Eat Healthy

Choosing a healthy diet not only helps lower your blood pressure but also offers numerous other health benefits. Incorporate the following foods into your diet to help reduce your blood pressure:

1. Carrots 
2. Spinach 
3. Bananas 
4. Beetroot 
5. Watermelon 
6. Oats 
7. Green leafy vegetables 
8. Garlic 
9. Daal (Lentils) 
10. Yogurt 
11. Pomegranates

4- Quit or limit alcohol consumption

Alcohol can damage the kidneys, impairing their function. To protect your health, it’s best to quit or, at the very least, limit your alcohol intake.

5- Quit Smoking

Cigarettes contain nicotine, an addictive substance that causes blood vessels to constrict, leading to an increase in blood pressure. If you have high blood pressure, it’s crucial to avoid smoking to protect your heart and overall health.  

6- Increase your sleep duration

Lack of sleep forces your heart to work harder, causing your blood vessels to constrict, which can lead to high blood pressure. Aiming for 7 to 8 hours of sleep is ideal for those with elevated blood pressure.

1- Which is better losartan or telmisartan? 

A study [3] conducted on 40 adults with hypertension divided them into two groups. One group was given telmisartan, and the other received losartan. The study observed that both medications exhibited good safety profiles and were equally effective. 

2- Can Losartan cause weight gain? 

There is currently no evidence to suggest that losartan causes weight gain. 

3- Can Losartan increase blood pressure? 

No, losartan does not increase blood pressure. It is used to treat high blood pressure. 

1. Phillips RA, Kloner RA, Grimm RH Jr, Weinberger M. The effects of amlodipine compared to losartan in patients with mild to moderately severe hypertension. J Clin Hypertens (Greenwich). 2003 Jan-Feb;5(1):17-23. doi: 10.1111/j.1524-6175.2003.01416.x. PMID: 12556649; PMCID: PMC8101887. Available from. 
2. Mulla S, Patel P, Siddiqui WJ. Losartan. [Updated 2024 Feb 26]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from. 
3. Netaji N. A Comparative Study of the Efficacy of Telmisartan and Losartan in the Treatment of Hypertension. Res. J. Pharm. 2024 May 10;18:45-8. Available from. 
4. Medical News Today. Losartan: Side effects and what to do about them [Internet]. 2023 [cited 2024 Dec 16]. Available from.