Betaloc 100 mg
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Betaloc 100 mg


Betaloc 100 mg is a medicine used in the treatment of high blood pressure also called hypertension. The active ingredient of this medicine is Metoprolol.

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A tablet that is commonly used to reduce anxiety and relieve tremors. In any case, physicians may prescribe Betaloc 100 mg to prevent heart-related chest pain (angina), bleeding in the stomach due to hypertension in the liver, migraines, and others. This medication works by blocking a certain natural substance in the body (epinephrine), which affects blood vessels and the heart. The active ingredient is Metoprolol. Nonetheless, it also contains other inactive ingredients such as magnesium stearate, microcrystalline cellulose, stearic acid, colloidal silicon dioxide, and others. Betaloc 100 mg belongs to a group of drugs called beta-blockers.

The manufacturer of Betaloc 100 is AstraZeneca Pharma Ltd.


Administer the pill whole by mouth with or without food and with a glass full of water. Do not use alcohol to take this medicine because it may increase your risk of side effects. You should not crush, break, or chew the tablet while swallowing. To decrease the risk of stomach upset or nausea, you can use this medicine with milk or light food. Take the tablet each day and at the same time, to get the most benefit. The recommended dose per day (24 hours) usually is 2-4 tablets or as directed by your physician. Do not use Betaloc 100 mg more often than your doctor prescribes because your condition will not improve faster. However, your healthcare professional may change the brand of the medicine if you do not notice the desired result.

If you prefer the liquid form of Metoprolol, it is advised to use a special measuring spoon to measure the dose. Do not use a household spoon because you may get the wrong dose, which may also increase your risk of adverse effects. Inform your doctor if your condition does not improve or if it worsens.


The dosages vary among patients because it depends on the severity of the health condition, age, weight (for children only), response to therapy, and other drugs that you may be using. Therefore, doctors prescribe different dosages for their patients. If you have doubts about what dosage is better for you, discuss it with your physician.

  • Betaloc 100 mg

Missed Dose: It is not recommended to miss a dose because symptoms may return. Thus, your condition becomes difficult to treat. However, if you miss one, physicians recommend taking the dose as soon as you remember. Skip the missed dose if it is too close to the time for the next dose. In addition, you should not double the dose the next time to catch up because you may experience severe adverse effects.

Overdose: You may rarely notice an overdose due to an increased dose of Metoprolol. Symptoms of overdose include breathing problems, fainting, severe dizziness, and others. Stop taking this medicine and get medical help immediately, if you experience any of the symptoms listed above. Ask your doctor if you have any questions.

Adverse Effects of Betaloc 100 mg

All medications may give you certain adverse reactions and Metoprolol is not an exception. In any case, you may not notice any of the following side effects if your body adjusts to this medicine. There are some factors that can cause adverse effects such as allergy and overdose.

Common Adverse Effects

Usually, patients can continue the treatment safely even if they experience any of the following side effects. It means that this category is not dangerous for them. Check some examples below:

  • Nausea
  • Dizziness
  • Vomiting
  • Lightheadedness
  • Tiredness
  • Unusual dreams
  • Weakness
  • Diarrhea

Severe Adverse Effects

Rarely, you may notice this category of adverse effects. Therefore, if you are experiencing any of them, stop taking Betaloc 100 mg and seek medical attention immediately. Your doctor may help you to avoid or prevent side effects. Check below some examples:

  • Irregular heartbeat
  • Raynaud’s phenomenon
  • Sudden weight gain
  • Reduced sexual ability
  • Fever
  • Extreme fatigue
  • Shortness of breath
  • Blue fingers or toes
  • Mental disorders (such as depression)

This document does not contain a full list of negative effects. Inform your doctor if you experience any of the adverse effects listed above or both of them at the same time.


This medicine may interact with other drugs and substances and increase your risk of side effects or decrease the effectiveness of Metoprolol. That’s why it is advised to share a list of products that you are using with your doctor before taking this medicine. Examples include herbal products, supplements, over-the-counter medicines, prescription medicines, vitamins, and others. Check below some examples of drug interaction:

  • Warfarin
  • Digoxin
  • Disopyramide
  • Rifabutin
  • Hydralazine
  • Epinephrine
  • Rizatriptan
  • Theophylline
  • Levothyroxine
  • Ibuprofen
  • Fluvoxamine
  • St. John’s wort
  • Cimetidine
  • Naproxen
  • Clonidine
  • Methyldopa
  • Atropine
  • Scopolamine
  • Prazosin
  • Aluminum hydroxide
  • Chlorpromazine
  • Fluoxetine
  • Mefloquine
  • Paroxetine
  • Thioridazine
  • Quinidine
  • Fingolimod
  • Haloperidol
  • Rifampin
  • Propafenone

This article does not contain all possible drug interactions. That’s why you should consult a doctor before using this medication. Additionally, you should not start, stop, or change the dosages without the doctor’s recommendation because it may lead to undesired results.


Inform your doctor if you are allergic to the ingredients of the drug or if you have any other allergies. In addition, share with your doctor your medical history before taking Betaloc 100 mg. For example:

  • Lung problems (such as emphysema, asthma, bronchitis, and others)
  • Kidney and liver disease
  • Pheochromocytoma
  • Mood or mental problems (such as depression)
  • Myasthenia gravis
  • Heart rhythm issues (such as sinus bradycardia, Wolff-Parkinson-White syndrome, atrioventricular block, and others)
  • Overactive thyroid
  • Blood circulation problems (such as Raynaud’s syndrome)
  • Cancer
  • Surgery
  • Diabetes
  • Bleeding problems

This medication may temporarily blur your vision or may make you sleepy or dizzy. Thus, it is recommended to limit or avoid alcoholic beverages and marijuana (cannabis) because the symptoms listed above may increase. Moreover, you should not drive or operate heavy machinery during treatment until you can do it safely.

Metoprolol can be used during pregnancy with a doctor’s approval only because it may harm you and your unborn baby. This medicine passes into breast milk. That’s why you should consult a doctor before breastfeeding.


  • It is advised to store this medicine at room temperature (below 30 Celsius degrees) and away from moisture and direct sunlight. Therefore, you should not keep Betaloc 100 mg in the bathroom.
  • Keep away this drug from the reach of children and pets because it may be harmful to them.

Additional information

Active Ingredient



AstraZeneca Pharma Ltd.


10 tabs/blister



Also known as



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