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Losartan vs Coreg

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Losartan Details

Coreg Details

Comparative Analysis

Losartan Prescription Information

Coreg Prescription Information

Losartan Side Effects

Coreg Side Effects

Safety Information

Cost Analysis

Market Analysis



For patients with hypertension or high blood pressure, certain drugs that modulate the effects of specific hormones and neurotransmitters in the body can help in stabilizing their condition and managing symptoms. Losartan and Coreg are two such drugs prescribed for this purpose. They each work differently, but both have a significant impact on lowering blood pressure.

Losartan is an angiotensin II receptor antagonist (ARB), which works by blocking the action of certain natural substances that tighten the blood vessels, allowing the blood to flow more smoothly and keeping the heart from working too hard.

On the other hand, Coreg is classified as a beta-adrenergic blocking agent, also known as a beta-blocker. It affects heart function and circulation (blood flow through arteries and veins). By slowing down your heartbeat rate as well as lessening its force of contraction when it pumps out blood into your system, Coreg makes it easier for your heart to pump efficiently while also reducing stress on your circulatory system.

Losartan vs Coreg Side By Side

Brand NameCozaarCoreg
ContraindicationsShould not be taken with certain heart rhythm medicines (antiarrhythmics).Should not be taken with certain heart rhythm medicines (antiarrhythmics).
CostFor the brand name, around $225 for 30 tablets of 50 mg. Generic versions generally fall between $10 and $20 for a month's supply.For the brand name, about $200–$300 for 60 capsules of 12.5 mg. Generic versions roughly $10-$20/month.
Generic NameLosartanCarvedilol
Most Serious Side EffectAllergic reactions, high potassium levels, kidney problems, liver issues.Severe allergic reaction, lightheadedness or fainting spells, rapid weight gain with swelling, slow heart rate (bradycardia), worsening chest pain, severe skin reactions, visual changes, shortness of breath.
Severe Drug InteractionsAntiarrhythmic drugs require a clearance period to prevent dangerous interactions.Antiarrhythmic drugs require a clearance period to prevent dangerous interactions.
Typical DoseStarts at 50 mg/day for adults, up to a maximum of 100mg per day.Begins at 3.125 mg, twice a day, up to a maximum of 50 mg per day.

What is Losartan?

Losartan (marketed as Cozaar and others) was the first drug of the angiotensin II receptor antagonists class of antihypertensive drugs, which marked a significant advancement from the initial category of beta blockers such as Coreg. Losartan was first approved by the FDA in 1995. This medication works by blocking a substance in the body that causes blood vessels to tighten, effectively helping them relax for longer than usual. It is prescribed for treating high blood pressure and protecting kidneys from damage due to diabetes. Losartan selectively blocks angiotensin II receptors with minimal influence on other bodily systems, resulting in it having fewer side effects than other blood pressure medications like Coreg that have broader effects on heart rate and cardiac output.

What conditions is Losartan approved to treat?

Losartan is approved for the treatment of various cardiovascular conditions, such as:

  • Hypertension, also known as high blood pressure
  • Diabetic nephropathy in patients with type 2 diabetes mellitus and a history of hypertension
  • Stroke prevention in patients with left ventricular hypertrophy and hypertension

How does Losartan help with these illnesses?

Losartan works to manage hypertension by inhibiting the action of angiotensin II, a hormone that narrows blood vessels and releases another hormone called aldosterone which causes your body to retain salt and water. Losartan blocks the receptors for angiotensin II, so its effects are lessened, allowing blood vessels to relax and widen. This in turn lowers blood pressure as it decreases the amount of work needed by the heart to pump blood around the body. Angiotensin II is a peptide hormone that plays an important role in regulating blood volume and systemic vascular resistance, which together influence cardiac output and arterial pressure. It's thought that people with high blood pressure have an overactive renin-angiotensin system leading to constriction of arteries and increase sodium (salt) reabsorption by kidneys. By blocking this system, Losartan can limit negative effects of hypertension helping patients manage their condition better.

What is Coreg?

Coreg, also known as carvedilol, is an alpha/beta-blocker that reduces the workload on the heart and helps it to beat more regularly. This drug blocks certain receptors in your body that, when stimulated by signals from your nervous system, can increase heart rate and blood pressure. By blocking these receptors, Coreg slows down heart rate and lowers blood pressure helping to relieve strain on the heart.

Carvedilol was first approved by the FDA in 1995. Unlike Losartan which is an angiotensin receptor blocker (ARB), Coreg does not primarily work by relaxing blood vessels. Its dual mechanism of action means that its side-effect profile may be different than ARBs like Losartan; common side effects may include dizziness or lightheadedness due to a drop in blood pressure upon standing (orthostatic hypotension). The therapeutic effect of reducing cardiac stress can be beneficial for treating conditions such as high blood pressure or congestive heart failure where removing extra load off the heart muscle is crucial.

What conditions is Coreg approved to treat?

Coreg is widely recognized for its use in the treatment of several medical conditions, including:

  • Heart failure and impaired left ventricle function post-heart attack
  • Hypertension (high blood pressure) This medication works by slowing down your heart rate and relaxing your blood vessels, which allows your heart to pump more efficiently. It's important to note that Coreg should be used as part of a comprehensive cardiovascular risk reduction program, which can include dietary and lifestyle changes.

How does Coreg help with these illnesses?

Coreg, also known as carvedilol, is an alpha and beta-blocker widely used to treat heart failure and high blood pressure. It works by blocking certain types of adrenergic receptors in the heart and blood vessels, reducing strain on the cardiovascular system. This action slows down the heartbeat, lowers blood pressure, improves blood flow, ultimately improving cardiac function. In contrast to Losartan which primarily blocks angiotensin II receptor inhibiting vasoconstriction (narrowing of blood vessels), Coreg's broader impact on multiple receptors results in a more comprehensive management of cardiovascular conditions. Additionally, Coreg may offer added benefits such as potential antioxidant activity and protection against harmful stress hormones that can exacerbate heart disease.

How effective are both Losartan and Coreg?

Both losartan (Cozaar) and carvedilol (Coreg) are effective drugs used in the management of hypertension, with their initial FDA approval dates being just a few years apart. These medicines function differently; losartan is an angiotensin II receptor blocker while carvedilol is a beta-blocker.

A 2004 clinical trial compared the efficacy of losartan and carvedilol in reducing blood pressure levels among patients with essential hypertension. The results showed that both medications have similar effectiveness. However, different side effects were reported: for example, postural hypotension was more prevalent among patients taking Coreg.

In terms of safety profiles, several studies suggest that both drugs are well-tolerated by most populations including older adults who often face high risks from hypertension. Losartan has been found to be particularly beneficial due to its renal protective effect on hypertensive patients with diabetes mellitus type 2.

Conversely, a meta-analysis report published in 2016 indicated that although carvedilol may not be as potent as other antihypertensive agents when used alone, it's often prescribed alongside other first-line treatments like ACE inhibitors or diuretics where it shows improved efficacy. Carvedilol’s unique property of also providing alpha-1 adrenergic blockade makes it advantageous over traditional beta-blockers especially for heart failure treatment.

Despite these benefits, one should consider individual patient factors such as comorbid conditions and potential drug interactions before choosing between these two medications – what works best will vary depending on each person’s specific circumstances.

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At what dose is Losartan typically prescribed?

Oral dosages of Losartan commonly start at 50 mg/day for the treatment of high blood pressure in adults, but studies have indicated that a dose as low as 25 mg/day can also be effective. For pediatric patients aged 6-16 years, the dosage might begin at 0.7mg/kg up to a maximum of 50 mg once daily. In either population, if blood pressure is not controlled with Losartan alone, additional blood pressure medication may be added or the dose increased after several weeks depending on how you respond to this drug. The maximum recommended long-term dose should not exceed 100mg per day.

At what dose is Coreg typically prescribed?

Coreg treatment for heart failure or post-heart attack patients typically begins at a low dosage of 3.125 mg, twice a day and taken with food for two weeks. The dose may then be doubled to 6.25 mg twice daily if tolerated well by the patient; this is done under close medical supervision. Depending on the individual's tolerance level, dosages can be increased gradually over several weeks up to a maximum of 50 mg per day divided into two doses spaced approximately 12 hours apart. A lower maximum dose (25mg/day) is advised in some cases such as patients weighing less than 85 kg or those with kidney problems.

What are the most common side effects for Losartan?

Common side effects of Losartan compared to Coreg may include:

  • Dizziness or lightheadedness due to a drop in blood pressure
  • Stomach pain, nausea, or diarrhea
  • Fatigue and general weakness
  • Persistent cough
  • Elevated potassium levels which can cause muscle weakness, slow heart rate and weak pulse
  • Blurred vision
  • Decreased sexual ability in males

Please remember that it's always important to discuss any concerns with your healthcare provider. These medications affect everyone differently and the above are potential side effects but not guaranteed for all patients.

abstract image of a patient experiencing side effect

Are there any potential serious side effects for Losartan?

While comparing Losartan to Coreg, it's crucial to understand that both have their unique side effects. In rare cases, severe side effects may occur while taking Losartan, including:

  • Allergic reactions such as hives; swelling of the face, lips, tongue or throat; difficulty in breathing.
  • Indications of high potassium levels like a slow heart rate, weak pulse, muscle weakness or limp feeling.
  • Kidney problems: little or no urination; painful or difficult urination; swelling in your feet or ankles
  • Liver issues: nausea and vomiting (upper stomach pain), loss of appetite
  • Rapid weight gain

On the other hand for Coreg:

  • Severe allergic reaction characterized by difficulty breathing; closing of your throat; swelling of your lips, tongue, or face
  • Unusually slow heartbeat combined with low blood pressure causing fatigue and dizziness. Symptoms related to asthma-like bronchospasm - wheezing and shortness of breath.

Whenever any serious symptoms are experienced while on these medications it is vital to seek immediate medical assistance.

What are the most common side effects for Coreg?

The following side effects could potentially be experienced with Coreg (Carvedilol):

  • Dizziness, lightheadedness, or fainting
  • Insomnia and other sleep problems
  • Weight gain
  • Dry eyes and blurred vision
  • Nausea, vomiting or bloating; possible loss of appetite
  • Slower heart rate combined with a feeling of fatigue
  • Occasional confusion or memory problems
  • Unusual tiredness or weakness in muscles and joints.

Please note these side effects are potential risks and may not occur as reactions to the medication vary from person to person. Always consult your healthcare provider for any concerns about new medications.

Are there any potential serious side effects for Coreg?

Coreg, like many medications, potentially has serious side effects. Be sure to monitor your health and contact a healthcare professional if you experience:

  • Signs of an allergic reaction such as hives; difficulty breathing; swelling of your face, lips, tongue, or throat
  • Lightheadedness or fainting spells
  • Rapid weight gain with swelling in the hands, ankles or feet
  • Slow heart rate (bradycardia) which may be associated with fatigue and weakness
  • Worsening chest pain (angina)
  • Severe skin reactions: rash that spreads causing blistering and peeling
  • Visual changes including blurry vision
  • Shortness of breath even at rest.

If any of these occur while using Coreg medication it's advisable to seek immediate medical attention.

Contraindications for Losartan and Coreg?

Both Losartan and Coreg, as with most other hypertension medications, may cause side effects such as dizziness or lightheadedness in some people. If you notice these symptoms worsening, or if you experience fainting spells, please seek immediate medical attention.

Neither Losartan nor Coreg should be taken if you are taking, or have recently been using certain heart rhythm medicines (antiarrhythmics). Always inform your physician of any medications that you are currently on; antiarrhythmic drugs will need a period of about 2 weeks to clear from the system to prevent dangerous interactions with both Losartan and Coreg.

Moreover, it’s important not to suddenly stop taking either drug without consulting your doctor first because doing so can exacerbate underlying heart conditions. These medications must be gradually reduced under the supervision of a healthcare professional.

How much do Losartan and Coreg cost?

For the brand name versions of these drugs:

  • The price for 30 tablets of Cozaar (Losartan, 50 mg) averages around $225, which works out to approximately $7.5/day.
  • The price for 60 capsules of Coreg (Carvedilol, 12.5 mg) is about $200–$300 depending on location and pharmacy, working out to around $3.33-$5/day.

Thus if you are taking the typical dosage range for Losartan (i.e., up to 100mg per day), then brand-name Coreg is less expensive on a per-day treatment basis. Please bear in mind that cost should not be your primary consideration when determining which medication is right for you.

For generic versions of these medications:

  • Generic losartan potassium costs can vary but generally fall between $10 and $20 for a month's supply at common doses like 50 or 100 mg/day.
  • Carvedilol prices also fluctuate but typically come in at roughly the same cost as generic losartan: around $10-$20/month depending on dose and location.

As always, it's important to discuss with your healthcare provider what medication will best suit your needs based on effectiveness and side effects rather than just cost alone.

Popularity of Losartan and Coreg

Losartan, both in its generic form and as the brand name Cozaar, was estimated to have been prescribed to about 47 million people in the US in 2020. Losartan accounted for nearly 20% of angiotensin receptor blocker (ARB) prescriptions in the US. It is one of the most commonly used drugs within this class and has seen a steady increase since its approval by FDA in 1995.

Carvedilol, including brand versions such as Coreg, was prescribed to approximately 9 million people in the USA during that same year. In terms of beta blocker prescriptions within the US, carvedilol accounts for just under 14%. The prevalence of carvedilol use has remained relatively steady over recent years. While both losartan and carvedilol are used to manage hypertension and heart failure conditions, they belong to different classes with distinct mechanisms of action; thus patient's specific condition will largely determine which medication is more suitable.


Both Losartan and Coreg (carvedilol) have long-standing records of usage in managing high blood pressure, and are supported by numerous clinical studies indicating their effectiveness over placebo treatments. In some instances, the drugs may be used together, but this must be under careful supervision by a healthcare provider as they can interact with each other. The two medications operate differently: Losartan is an angiotensin receptor blocker that relaxes blood vessels for easier blood flow, while Coreg works as a beta-blocker to slow the heart rate and reduce its workload.

Both medications are available in generic form which represents substantial cost savings especially for patients who need to pay out of pocket. Both Losartan and Coreg may require an adjustment period meaning that effects might not be noticeable immediately.

The side effect profile is similar between these two drugs - they're both generally well-tolerated but could cause dizziness or lightheadedness initially until the body adjusts to them. However, Coreg can sometimes lead to weight gain or sexual dysfunction unlike Losartan. For both drugs, patients should closely monitor their health status particularly when starting treatment and seek immediate medical help if they notice any severe side effects such as slow heartbeat or fainting.