Penastin
Penastin Uses, Dosage, Side Effects, Mechanism of Action, How Long Does it Take to Work? Penastin is a brand name. Its generic name is Epinastine.
Introduction
Penastin is a topical antihistamine medication used to treat signs and symptoms of allergic conjunctivitis, a condition caused by allergens such as pollen, animal dander and mold. Allergic conjunctivitis includes common symptoms like red, itchy and watery eyes. Prescription medications such as epinastine are typically used when allergy relief obtained from over-the-counter medications is not sufficient.Uses
Penastin is used to treat the signs and symptoms of allergic conjunctivitis, such as red, itchy, and watery eyes.Mechanism of Action
Penastin blocks H1 receptors in the eye and prevents the release of histamine, which causes allergy signs and symptoms. It also provides anti-inflammatory, anti-allergic and anti-itch relief.How Long Does It Take to Work?
Penastin typically begins to improve symptoms within 1 to 2 days of administration. Maximum relief from symptoms should be achieved by 7 to 14 days.Absorption
Penastin is administered to the eyes as eye drops, and is generally not absorbed into the systemic circulation.Route of Elimination
Penastin is not absorbed into the systemic circulation, and is eliminated primarily from the eyes via tears and ocular secretions.Dosage
The recommended dosage of epinastine ophthalmic solution is one drop in each affected eye twice a day, approximately 12 hours apart. The medication should be administered as directed by a healthcare professional.Administration
Penastin should be applied directly to the eyes as eye drops using the single-use bottle applicator provided. Before using the medication, the patient should wash their hands and gently shake the bottle. The patient should avoid allowing the applicator/tip of the dropper to touch any surface, including the eyes and fingers. After use, the eye dropper should be closed and stored in a dry, secure place away from direct sunlight and heat.Side Effect
Common side effects of epinastine may include burning, stinging, blurred vision, headache, and mild redness at the site of application.Toxicity
Penastin is generally well-tolerated and not associated with significant systemic toxicity.Precaution
Penastin should be avoided for patients with a known hypersensitivity to the active ingredient. Additionally, patients should be instructed not to wear contact lenses while using this medication, as it may cause eye irritation.Interaction
Penastin is not known to interact with other medications, however it should be used with caution in combination with other eye medications.Disease Interaction
Penastin has not been studied in patients with renal or hepatic impairment. The medication should be used with caution in these patients.Drug Interaction
Penastin has not been extensively studied for drug interactions. Patients should consult their healthcare provider before taking any new medications, or consult a pharmacist about potential drug interactions.Food Interactions
Penastin has no known food interactions and may be used with or without food.Pregnancy Use
Penastin should be used with caution in pregnant patients. The possible risks and benefits should be discussed with a healthcare provider.Lactation Use
Penastin is excreted in human milk and should be used with caution in breastfeeding mothers.Acute Overdose
No adverse effects have been reported from acute overdose of epinastine.Contraindication
Penastin is contraindicated in patients with a known hypersensitivity to the active ingredient.Use Direction
Penastin should be used in the eyes as an ophthalmic solution. The patient should wash their hands before use and gently shake the bottle. One drop should be applied to the affected eye (or eyes) twice daily, approximately 12 hours apart. The patient should avoid allowing the tip of the dropper to touch any surface. After use, the dropper should be closed and stored away from direct sunlight and heat.Storage Condition
Penastin should be stored between 2 and 30 degrees Celsius (36 to 86 degrees Fahrenheit) and in a dry, secure place away from direct sunlight and heat.Volume of Distribution
Penastin is not absorbed into the systemic circulation and does not exhibit a volume of distribution.Half Life
Penastin has a half-life of approximately 25 to 27 hours.Clearance
Penastin is primarily eliminated from the eyes via tears and ocular secretions. The clearance is approximately 0.2 L/day.Here you find in details version of Penastin
Some Frequently Asked Questions About Penastin
What is Penastin?
Penastin is an antihistamine medication that is used to treat symptoms of allergies such as itchy and watery eyes, sneezing, and runny nose.
What are the common side effects of Penastin?
Common side effects of Penastin include headache, dry or sore throat, drowsiness, dizziness, increased appetite, nausea, tiredness, and stomach pain.
Is Penastin safe to use?
Penastin is generally considered safe for most people to use, however you should always check with your doctor before taking any medication.
How long does it take for Penastin to work?
The effects of Penastin can be felt within 30 minutes, however the full effects may take up to several hours to be experienced.
Does Penastin help with allergies?
Yes, Penastin is an antihistamine which can help relieve symptoms of allergies such as itchy and watery eyes, sneezing, and runny nose.
Can Penastin be used for children?
Penastin is not recommended for use in children under the age of 2 years, unless specifically recommended by a doctor.
Can I take Penastin while pregnant?
It is not recommended to take Penastin while pregnant, as there is insufficient information about its safety in this situation.
What is the dosage for Penastin?
The recommended dosage for Penastin is two tablets taken orally once per day, on an empty stomach.
Does Penastin cause drowsiness?
Yes, drowsiness is a common side effect of Penastin, so it is important to be aware of this when using this medication.
Can Penastin affect blood pressure?
Penastin can cause an increase in blood pressure. It is recommended to monitor your blood pressure regularly while taking this medication.
Can I drink alcohol while taking Penastin?
It is not recommended to drink alcohol while taking Penastin, as alcohol can increase the side effects of this medication.
What should I do if I forget to take Penastin?
If you forget to take your dose of Penastin, take it as soon as you remember, unless it is almost time for your next dose. Do not take a double dose.
Can Penastin cause blurred vision?
Yes, blurred vision is a possible side effect of Penastin. If this occurs, it is important to tell your doctor right away.
Does Penastin cause weight gain?
It is possible for Penastin to cause weight gain due to its effect on appetite. It is important to watch your weight and talk with your doctor if you have noticed any undesired changes.
Can I use Penastin while breastfeeding?
Penastin should generally not be used while breastfeeding, as there is very limited information on its safety. It is important to speak to your doctor to determine the best course of treatment.
Can I take Penastin if I have liver disease?
It is not recommended to take Penastin if you have liver disease. Speak to your doctor if you have any concerns before taking this medication.
Can Penastin be used with other medications?
Yes, Penastin can be used with other medications, however it is important to check with your doctor or pharmacist before combining medications.
Does Penastin cause dry mouth?
Yes, dry mouth is a common side effect of Penastin. You can manage this side effect by drinking plenty of water and chewing sugar-free gum.
Does Penastin cause constipation?
Constipation is a possible side effect of Penastin. If this occurs, it is important to talk to your doctor about ways to manage this side effect.
Does Penastin cause dizziness?
Yes, dizziness is a common side effect of Penastin. You may be more likely to experience this side effect if you stand up quickly from sitting or lying down.
Can Penastin be used to treat hay fever?
Yes, Penastin can be used to treat hay fever symptoms such as itchy and watery eyes, sneezing, and runny nose.
Can Penastin cause anxiety?
Anxiety is a possible side effect of Penastin. Talk to your doctor if you have any concerns before taking this medication.
Can Penastin be used to treat hives?
Yes, Penastin can be used to treat hives and other allergy symptoms. It is important to speak to your doctor to determine the best course of treatment.
Can Penastin be used to treat itching?
Yes, Penastin can be used to treat itching due to allergies or other causes. It is important to speak to your doctor to determine the best course of treatment.
What should I do if I have an allergic reaction to Penastin?
If you experience any symptoms of an allergic reaction, such as difficulty breathing, hives, or swelling of the face, lips, tongue, or throat, it is important to seek medical attention right away.
How long does it take for Penastin to start working?
The effects of Penastin can be felt within 30 minutes, however the full effects may take up to several hours to be experienced.
How long does Penastin stay in your system?
The effects of Penastin can last up to 8 hours. It is important to follow your doctor's instructions for taking this medication.
Does Penastin cause headaches?
Yes, headaches are a common side effect of Penastin. If this occurs, it is important to tell your doctor right away.
Can Penastin be used to treat allergic reactions?
Yes, Penastin can be used to treat allergic reactions such as itchy and watery eyes, sneezing, and runny nose.
Does Penastin interact with other medications?
Yes, Penastin can interact with other medications such as antibiotics and antifungals. It is important to speak to your doctor or pharmacist before combining medications.
Does Penastin cause loss of appetite?
Yes, loss of appetite is a common side effect of Penastin. It is important to speak to your doctor if you have any concerns before taking this medication.
Can Penastin be used to treat eye allergies?
Yes, Penastin can be used to treat eye allergies such as itching, redness, and inflammation.
Can Penastin cause sleepiness?
Yes, drowsiness is a common side effect of Penastin, so it is important to be aware of this when using this medication.
Can I take Penastin if I have asthma?
Yes, you can take Penastin if you have asthma, however it is important to speak to your doctor to ensure this medication is suitable for you.
Does Penastin cause dry eyes?
Yes, dry eye is a possible side effect of Penastin. It is important to tell your doctor if you experience this side effect.
Does Penastin cause nausea?
Yes, nausea is a common side effect of Penastin. It is important to tell your doctor if you experience this side effect.
Can you become addicted to Penastin?
Penastin is not known to be addictive. However, it is important to follow your doctor's instructions for taking this medication.
Should Penastin be taken with food?
It is recommended to take Penastin on an empty stomach, at least 30 minutes before or after a meal.
Can Penastin affect mood?
Yes, it is possible for Penastin to affect mood. It is important to tell your doctor if you experience any changes in mood while taking this medication.
Can Penastin be used to treat sinus infections?
Penastin is not typically used to treat sinus infections, however it may be recommended in some cases. It is important to speak to your doctor to determine the best course of treatment.
Does Penastin cause stomach pain?
Yes, stomach pain is a common side effect of Penastin. It is important to tell your doctor if you experience this side effect.
Does Penastin cause kidney problems?
Kidney problems are a possible side effect of Penastin. It is important to tell your doctor if you experience any changes in kidney function while taking this medication.
Can I take Penastin with other allergy medications?
It is generally not recommended to take Penastin with other allergy medications, as this can increase the risk of side effects. Speak to your doctor or pharmacist if you have any concerns before taking this medication.