Terfenadina

Terfenadina Uses, Dosage, Side Effects, Mechanism of Action, How Long Does it Take to Work? Terfenadina is a brand name. Its generic name is Terfenadine.

Terfenadina Introduction

Terfenadina is an antihistamine used to treat allergies in adults and children over the age of 12. It is available as a generic drug in both oral and topical form. It is a potent inhibitor of the histamine H1 receptor and it blocks histamine release from cells.

Uses

Terfenadina is used to treat a variety of allergic reactions such as sneezing, itching, runny nose, watery eyes, hives, and rash. It may also be used to treat symptoms of conferences like colds, other upper respiratory tract infections, hay fever, and hives.

Mechanism of Action

Terfenadina blocks histamine release from cells. Histamine is a chemical released from cells that causes inflammation and other allergic reactions. By blocking the release of histamine, terfenadine relieves the symptoms associated with an allergic reaction.

How Long Does it Take to Work?

Terfenadina typically starts working within 30 minutes of use. However, it may take longer depending on the severity of your symptoms.

Absorption

Terfenadina is well-absorbed from the gastrointestinal tract. Peak plasma concentrations of this drug are reached in about 2-3 hours after ingestion. It is damaged slowly and most of it is excreted in the feces.

Route of Elimination

Terfenadina is eliminated primarily through the urine and feces. Less than 10% of the drug is eliminated unchanged in the urine.

Dosage

The usual dosage of Terfenadina for adults and children over 12 is 60 mg twice daily. This dosage can be increased to 120 mg twice daily if necessary.

Administration

Terfenadina can be taken orally or applied topically to the affected area. When taken orally, it should be taken with a full glass of water.

Side Effects

Common side effects of terfenadine include dry mouth, dizziness, fatigue, headache, and nausea. More serious side effects include difficulty breathing, confusion, and confusion.

Toxicity

Terfenadina is typically considered safe. However, taking too much of this medication can lead to serious side effects. If you experience any serious side effects, you should contact your doctor immediately.

Precaution

Before taking terfenadine, you should tell your doctor if you have any allergies, heart problems, liver disease, or kidney disease. This medication may also interact with other medications. Be sure to tell your doctor about all the medications you are taking.

Interaction

Terfenadina may interact with other medications, including non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen and naproxen, antifungals, anticonvulsants, STATins, and birth control pills. You should also tell your doctor if you are taking any herbal supplements, as some of them may interact with this medication.

Disease Interaction

Individuals with heart disease, liver or kidney disease, and seizures should use terfenadine with caution as it may worsen these conditions. You should talk to your doctor before taking this medication if you have one of these conditions.

Drug Interaction

Drug interactions with terfenadine can occur with certain medications such as warfarin, antifungal medications, and Stateins. Talk to your doctor about any prescription or over-the-counter medications you are taking before starting terfenadine.

Food Interactions

Terfenadina should not be taken with alcoholic beverages as it can increase the risk of side effects. Some foods, such as grapefruit, can also interact with this medication so it should be avoided while taking terfenadine.

Pregnancy Use

Terfenadina should only be used during pregnancy if the potential benefit outweighs the risk. It should not be used by pregnant women unless prescribed by a doctor. It is also important to tell your doctor if you are breastfeeding.

Lactation Use

Terfenadina is excreted in breast milk and should not be taken by nursing women without consulting their doctor. Non-pharmacological measures such as elimination of allergens or avoidance of exposure to them may be beneficial.

Acute Overdose

If you or someone else has taken too much terfenadine, seek medical attention immediately. Symptoms of an overdose include dizziness, drowsiness, confusion, and seizures.

Contraindication

Terfenadina should not be used by individuals with a history of hypersensitivity to terfenadine or to any of the components of the preparation. It should also not be used in patients with severe renal impairment.

Use Direction

Take terfenadine exactly as prescribed by your healthcare provider. Do not take more or less than the prescribed amount. Do not stop taking this medication without the advice of your doctor. Do not take this medication with any beverages containing alcohol.

Storage Condition

Store terfenadine at room temperature, away from heat, moisture, and direct light. Dispose of any unused medication properly.

Volume of Distribution

Terfenadina has a volume of distribution of 0.5-1.0 L/kg. This means that the amount of drug in the body is spread over a large area of distribution.

Half Life

The half life of terfenadine is about 5-9 hours. The half life is the amount of time it takes for the concentration of the drug in the body to be reduced by 50%.

Clearance

The clearance of terfenadine is approximately 12 mL/min/kg. This means that the body can metabolize and eliminate the drug from the body at a rate of 12 milliliters per minute per kilogram of body weight.

Here you find in details version of Terfenadina

Some Frequently Asked Questions About Terfenadina

What is Terfenadina?

Terfenadina is an antihistamine, a type of drug that blocks the action of histamines, which are chemicals that the body releases during an allergic reaction.

What is Terfenadina used for?

Terfenadina is used to treat symptoms of seasonal allergies and hay fever, such as sneezing, itching, and watery eyes.

How does Terfenadina work?

Terfenadina blocks the action of histamines, which are chemicals that the body releases during an allergic reaction. By blocking the action of histamines, Terfenadina reduces allergic symptoms such as sneezing, itching, and watery eyes.

How should I take Terfenadina?

Terfenadina should be taken as directed by your doctor. You should take it with food or milk to prevent stomach upset. Do not take more than the recommended dose and do not take it more often than directed.

What are the side effects of Terfenadina?

Common side effects of Terfenadina include drowsiness, dry mouth, and upset stomach. If these effects become bothersome, talk to your doctor.

Does Terfenadina interact with other medications?

Yes, Terfenadina can interact with other medications, particularly medications for depression, anxiety, blood pressure, heart rhythm problems, and certain antibiotics. Ask your doctor or pharmacist if Terfenadina is safe to take with any other medications that you are taking.

Can I take Terfenadina while pregnant or breastfeeding?

It is not recommended that Terfenadina be used during pregnancy or breastfeeding, as it may affect the developing baby. Talk to your doctor about the potential risks and benefits of taking Terfenadina while pregnant or breastfeeding.

Are there any over-the-counter forms of Terfenadina available?

No, Terfenadina is not available over the counter. You must have a prescription from your doctor in order to get Terfenadina.

What should I do if I miss a dose of Terfenadina?

If you miss a dose of Terfenadina, take the missed dose as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take your next dose at the regular time.

What should I do if I overdose on Terfenadina?

If you think you have overdosed on Terfenadina, you should seek immediate medical attention. Symptoms of a Terfenadina overdose include dizziness, drowsiness, nausea, vomiting, stomach pain, confusion, and fast or irregular heartbeat.

How long does it take for Terfenadina to take effect?

Terfenadina usually begins to take effect within 30 minutes of taking it. The full effects of Terfenadina may take up to 4 hours to take effect.

How long does the effects of Terfenadina last?

The effects of Terfenadina usually last for 4-6 hours.

Can I drive or operate machinery while taking Terfenadina?

No, you should not drive or operate any machinery while taking Terfenadina, as it can cause drowsiness. You should not take any other medications that may cause drowsiness while on Terfenadina.

Is Terfenadina habit-forming?

No, Terfenadina is not known to be habit-forming.

Can I take Terfenadina with alcohol?

No, you should not take Terfenadina with alcohol as it can increase the risk of side effects such as drowsiness and dizziness.

Does Terfenadina have any drug interactions?

Yes, Terfenadina can interact with other medications, particularly medications for depression, anxiety, blood pressure, heart rhythm problems, and certain antibiotics. Ask your doctor or pharmacist if Terfenadina is safe to take with any other medications that you are taking.

Can children take Terfenadina?

Yes, Terfenadina can be taken by children over the age of 12 years. However, it is important to talk to your doctor before giving Terfenadina to a child, as it may not be suitable for all children.

Is Terfenadina safe to take long-term?

Terfenadina is generally safe to take long-term, as long as it is taken as directed. However, you should talk to your doctor if you are taking it for more than two weeks, as they may need to monitor your progress and adjust your dosage.

What should I do if I forget to take a dose of Terfenadina?

If you forget to take a dose of Terfenadina, take the missed dose as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take your next dose at the regular time.

Can I take Terfenadina with other medications?

Yes, you can take Terfenadina with other medications, as long as your doctor or pharmacist approves. However, it is important to tell your doctor about all other medications you are taking before taking Terfenadina.

What should I do if I experience side effects while taking Terfenadina?

If you experience any side effects while taking Terfenadina, you should talk to your doctor. Your doctor may need to adjust your dosage or switch you to a different medication.

How long does it take for Terfenadina to work?

Terfenadina usually begins to take effect within 30 minutes of taking it. The full effects of Terfenadina may take up to 4 hours to take effect.

Can I take Terfenadina with ibuprofen?

Yes, you can take Terfenadina with ibuprofen, as long as your doctor or pharmacist approves. However, it is important to tell your doctor about all other medications you are taking before taking Terfenadina.

What should I do if Terfenadina does not seem to be working?

If Terfenadina does not seem to be working for you, you should talk to your doctor. Your doctor may need to adjust your dosage or switch you to a different medication.

Can I take Terfenadina with other antihistamines?

No, you should not take Terfenadina with other antihistamines. Taking multiple antihistamines can increase your risk of side effects. Talk to your doctor if you need to take more than one antihistamine.

What should I avoid while taking Terfenadina?

While taking Terfenadina, you should avoid driving or operating any machinery, as it can cause drowsiness. You should also avoid taking any other medications that may cause drowsiness, such as sleeping pills or alcohol.

Does Terfenadina have any serious side effects?

Yes, Terfenadina can have serious side effects, including confusion, irregular heartbeat, rash, hives, difficulty breathing, swelling of the face, and dizziness. Seek immediate medical attention if you experience any of these symptoms while taking Terfenadina.

Can I take Terfenadina with birth control?

Yes, you can take Terfenadina with birth control, as long as your doctor or pharmacist approves. However, it is important to tell your doctor about all other medications you are taking before taking Terfenadina.

Is it safe to take Terfenadina every day?

Yes, it is generally safe to take Terfenadina every day. However, you should talk to your doctor if you will be taking Terfenadina for more than two weeks, as they may need to monitor your progress and adjust your dosage if necessary.

Can Terfenadina cause headaches?

Yes, Terfenadina can cause headaches in some people. If you experience headaches while taking Terfenadina, talk to your doctor.

Should I take Terfenadina with food?

Yes, it is recommended to take Terfenadina with food or milk to prevent stomach upset.

Can Terfenadina cause constipation?

Yes, Terfenadina can cause constipation in some people. If you experience constipation while taking Terfenadina, talk to your doctor.

Can Terfenadina cause weight gain?

Yes, Terfenadina can cause weight gain in some people. If you experience weight gain while taking Terfenadina, talk to your doctor.

Are there any drug interactions with Terfenadina?

Yes, Terfenadina can interact with other medications, particularly medications for depression, anxiety, blood pressure, heart rhythm problems, and certain antibiotics. Ask your doctor or pharmacist if Terfenadina is safe to take with any other medications that you are taking.

Can I take Terfenadina while nursing?

It is not recommended that Terfenadina be used while nursing, as it may affect the baby. Talk to your doctor about the potential risks and benefits of taking Terfenadina while nursing.

Can I take Terfenadina if I have asthma?

Yes, Terfenadina can be used in people with asthma, as long as it is monitored closely. Talk to your doctor if you have asthma and are considering taking Terfenadina.

What other conditions is Terfenadina used to treat?

Terfenadina can also be used to treat nausea and vomiting caused by motion sickness, as well as hives and itching caused by insect bites.

Is Terfenadina a prescription medication?

Yes, Terfenadina is a prescription medication. You must have a prescription from your doctor in order to get Terfenadina.

Are there any age restrictions on taking Terfenadina?

Yes, Terfenadina is not recommended for children under 12 years of age. Talk to your doctor before giving Terfenadina to a child.

What should I do if I experience dizziness while taking Terfenadina?

If you experience dizziness while taking Terfenadina, you should contact your doctor. Your doctor may need to adjust your dosage or switch you to a different medication.

Can I take Terfenadina if I have high blood pressure?

Yes, Terfenadina can be taken by people with high blood pressure, as long as it is closely monitored. Talk to your doctor if you have high blood pressure and are considering taking Terfenadina.