Dayhist Allergy 12 Hour Relief
Generic Name: Clemastine (KLEM as teen)
Brand Name: Dayhist Allergy 12 Hour Relief, Tavist Allergy
Medically reviewed by Drugs.com. Last updated on Dec 9, 2020.
Uses of Dayhist Allergy 12 Hour Relief:
- It is used to ease allergy signs.
What do I need to tell my doctor BEFORE I take Dayhist Allergy 12 Hour Relief?
- If you have an allergy to clemastine or any other part of Dayhist Allergy 12 Hour Relief (clemastine).
- If you are allergic to Dayhist Allergy 12 Hour Relief (clemastine); any part of Dayhist Allergy 12 Hour Relief (clemastine); or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.
- If you have taken certain drugs for depression or Parkinson's disease in the last 14 days. This includes isocarboxazid, phenelzine, tranylcypromine, selegiline, or rasagiline. Very high blood pressure may happen.
- If you are taking any of these drugs: Linezolid or methylene blue.
- If you are breast-feeding. Do not breast-feed while you take Dayhist Allergy 12 Hour Relief (clemastine).
This is not a list of all drugs or health problems that interact with Dayhist Allergy 12 Hour Relief (clemastine).
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Dayhist Allergy 12 Hour Relief (clemastine) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take Dayhist Allergy 12 Hour Relief?
- Tell all of your health care providers that you take Dayhist Allergy 12 Hour Relief (clemastine). This includes your doctors, nurses, pharmacists, and dentists.
- Do not take more than what your doctor told you to take. Taking more than you are told may raise your chance of very bad side effects.
- Do not take Dayhist Allergy 12 Hour Relief (clemastine) for longer than you were told by your doctor.
- Avoid driving and doing other tasks or actions that call for you to be alert until you see how Dayhist Allergy 12 Hour Relief (clemastine) affects you.
- Avoid drinking alcohol while taking Dayhist Allergy 12 Hour Relief (clemastine).
- Talk with your doctor before you use other drugs and natural products that slow your actions.
- Do not use Dayhist Allergy 12 Hour Relief (clemastine) to treat asthma. Talk with the doctor.
- If you are 60 or older, use Dayhist Allergy 12 Hour Relief (clemastine) with care. You could have more side effects.
- Use with care in children. Talk with the doctor.
- Talk with the doctor before you use Dayhist Allergy 12 Hour Relief (clemastine) for a child younger than 12 years old.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Dayhist Allergy 12 Hour Relief (clemastine) while you are pregnant.
How is this medicine (Dayhist Allergy 12 Hour Relief) best taken?
Use Dayhist Allergy 12 Hour Relief (clemastine) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- Take with or without food. Take with food if it causes an upset stomach.
What do I do if I miss a dose?
- If you take Dayhist Allergy 12 Hour Relief (clemastine) on a regular basis, take a missed dose as soon as you think about it.
- If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
- Do not take 2 doses at the same time or extra doses.
- Many times Dayhist Allergy 12 Hour Relief (clemastine) is taken on an as needed basis. Do not take more often than told by the doctor.
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Change in balance.
What are some other side effects of Dayhist Allergy 12 Hour Relief?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- Feeling sleepy.
- Stomach pain.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out Dayhist Allergy 12 Hour Relief?
- Store at room temperature.
- Store in a dry place. Do not store in a bathroom.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
Consumer information use
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Dayhist Allergy 12 Hour Relief (clemastine), please talk with your doctor, nurse, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
More about clemastine
- Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Images
- Drug Interactions
- Pricing & Coupons
- En Español
- 3 Reviews
- Drug class: antihistamines
- Other brands
- Tavist Allergy
Related treatment guides
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.