Generic Name: Timolol Brand Name(s): Generics only. No brands available.

Uses

What is Timolol used for?

Timolol is used with or without other medications to treat high blood pressure (hypertension). Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. This medication is also used after a heart attack to help prevent another heart attack from occurring.

This medication belongs to a class of drugs known as beta blockers. It works by blocking the action of certain natural chemicals in your body such as epinephrine on the heart and blood vessels. This effect lowers the heart rate, blood pressure, and strain on the heart.

This medication is also used to prevent migraine headaches.

How should I take Timolol?

Take this medication by mouth with or without food, usually once or twice a day or as directed by your doctor.

Dosage is based on your medical condition and response to treatment. For the treatment of high blood pressure, do not take more than 60 milligrams a day. For the prevention of migraines, do not take more than 30 milligrams a day.

Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day.

For the treatment of high blood pressure, it may take several weeks before you get the full benefit of this drug. It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick.

To prevent chest pain or migraine headaches, it is very important to take this medication regularly as prescribed. This drug should not be used to treat chest pain or migraines when they occur. Use other medications to relieve sudden attacks as directed by your doctor (for example, nitroglycerin tablets placed under the tongue for chest pain, “triptan” drugs such as sumatriptan for migraines). Consult your doctor or pharmacist for details.

Tell your doctor if your condition does not improve or if it worsens (for example, if your routine blood pressure readings remain high or increase, if your chest pain or migraines occur more often).

How do I store Timolol?

Timolol is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Timolol in the bathroom or the freezer. There may be different brands of Timolol that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush Timolol down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Timolol?

Before taking timolol, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: certain types of heart rhythm problems (such as a slow heartbeat, second- or third-degree atrioventricular block), severe heart failure, breathing problems (such as asthma, chronic bronchitis, emphysema).

Before using this medication, tell your doctor or pharmacist your medical history, especially of: treated stable heart failure, kidney disease, liver disease, overactive thyroid disease (hyperthyroidism), serious allergic reactions including those needing treatment with epinephrine, blood circulation problems (such as Raynaud’s disease, peripheral vascular disease), mental/mood disorders (such as depression), a certain muscle disease (myasthenia gravis).

If you have diabetes, this product may mask the fast/pounding heartbeat you would usually feel when your blood sugar falls too low (hypoglycemia). Other symptoms of low blood sugar, such as dizziness and sweating, are unaffected by this drug. This product may also make it harder to control your blood sugar. Check your blood sugar regularly as directed and share the results with your doctor. Tell your doctor right away if you have symptoms of high blood sugar such as increased thirst/urination. Your doctor may need to adjust your diabetes medication, exercise program, or diet.

Before having surgery, tell your doctor or dentist that you are taking this medication.

This drug may make you dizzy. Alcohol or marijuana can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana.

Kidney function declines as you grow older. This medication is removed by the kidneys. Therefore, older adults may be more sensitive to the side effects of this drug, including dizziness and tiredness.

During pregnancy, this medication should be used only when clearly needed. It may harm an unborn baby. Discuss the risks and benefits with your doctor.

This medication passes into breast milk and may have undesirable effects on a nursing infant. Discuss the risks and benefits with your doctor before breast-feeding.

Is it safe during pregnancy or breast-feeding?

There are no adequate studies in women for determining risk when using this Timolol during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking Timolol. Timolol is pregnancy risk category C according to the US Food and Drug Administration (FDA).

FDA pregnancy risk category reference below:

  • A=No risk,
  • B=No risk in some studies,
  • C=There may be some risk,
  • D=Positive evidence of risk,
  • X=Contraindicated,
  • N=Unknown

Side effects

What side effects can occur from Timolol?

Tiredness, slow heartbeat, and dizziness may occur. Decreased sexual ability has been reported rarely. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

To lower your risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.

This drug may reduce blood flow to your hands and feet, causing them to feel cold. Smoking may worsen this effect. Dress warmly and avoid tobacco use.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if any of these unlikely but serious side effects occur: very slow heartbeat, severe dizziness, fainting, blue fingers/toes, trouble breathing, new or worsening symptoms of heart failure (such as shortness of breath, swelling ankles/feet, unusual tiredness, unusual/sudden weight gain), mental/mood changes (such as confusion, mood swings, depression).

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.

Interactions

What drugs may interact with Timolol?

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: fingolimod, drugs affecting liver enzymes that remove timolol from your body (such as quinidine, SSRI antidepressants such as fluoxetine).

Some products have ingredients that could raise your heart rate or blood pressure. Tell your pharmacist what products you are using, and ask how to use them safely (especially cough-and-cold products, diet aids, or NSAIDs such as ibuprofen/naproxen).

Timolol may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Does food or alcohol interact with Timolol?

Timolol may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with Timolol?

Timolol may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.

Dosage

The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using this Timolol.

What is the dose of Timolol for an adult?

Usual Adult Dose for Hypertension

Initial dose: 10 mg orally twice a day

Maintenance dose: 10 to 20 mg orally twice a day

Maximum dose: 30 mg orally twice a day

Comment:

-There should be an interval of at least 7 days between increases in dosages.

-This drug may be used with a thiazide diuretic or with other antihypertensive agents.

Use: For hypertension alone or in combination with other antihypertensive agents, especially thiazide-type diuretics

Usual Adult Dose for Myocardial Infarction

Initial dose: 10 mg orally twice a day

Use: For patients who have survived the acute phase of myocardial infarction, and are clinically stable, to reduce cardiovascular mortality and the risk of reinfarction

Usual Adult Dose for Migraine Prophylaxis

Initial dose: 10 mg orally twice a day

Maintenance dose: 10 to 30 mg given in 1 to 2 divided doses

Use: For the prophylaxis of migraine headache

Renal Dose Adjustments

Dose reductions may be necessary.

Liver Dose Adjustments

Dose reductions may be necessary.

Dialysis

Dosing should be cautious because hypotensive responses have been seen in patients with marked renal impairment undergoing dialysis after 20 mg doses.

Other Comments

Storage requirements:

-Consult the manufacturer product information.

Reconstitution/preparation techniques:

-Consult the manufacturer product information.

IV compatibility:

-Consult the manufacturer product information.

What is the dose of Timolol for a child?

The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.

How is Timolol available?

Timolol is available in the following dosage forms and strengths:

  • Oral tablet,
  • Compounding powder.

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of Timolol, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

 

Hello Health Group does not provide medical advice, diagnosis or treatment.

Sources

Review Date: May 10, 2018 | Last Modified: May 10, 2018

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