Clamist Tablet
Written By Dr. Love Sharma, PhD (Pharmacology), PGDPRA
Reviewed By Dr. Shilpa Garcha, MD (Pharmacology), MBBS
Last updated on 12 Nov 2024 | 01:00 AM (IST)
Clamist Tablet is an antiallergic medication used in the treatment of various allergic conditions. It provides relief from symptoms such runny nose, sneezing, itching, redness, swelling, and watery eyes.
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General Information
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Product introduction
Clamist Tablet may be taken with or without food. Take it as per your doctor's advice. The dose and how often you take it depends on what you are taking it for. Your doctor will decide how much you need to improve your symptoms. You should take this medicine for as long as it is prescribed for you. In case, you have missed any doses, take the next dose as soon as you remember it. However, you should never take a double dose.
Drowsiness or dizziness is the most common side effect of this medicine. It may also cause dry mouth in some people. Avoid driving or attention-seeking activity if you experience drowsiness after taking this medicine. If it causes dry mouth, drink more water and have a sugar candy.
Before taking this medicine, let your doctor know if you have glaucoma or have any gastro-related issues or have asthma. Inform your doctor if you are pregnant, or breastfeeding. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. Generally, it is advised to avoid alcohol while on treatment.
Drowsiness or dizziness is the most common side effect of this medicine. It may also cause dry mouth in some people. Avoid driving or attention-seeking activity if you experience drowsiness after taking this medicine. If it causes dry mouth, drink more water and have a sugar candy.
Before taking this medicine, let your doctor know if you have glaucoma or have any gastro-related issues or have asthma. Inform your doctor if you are pregnant, or breastfeeding. Your doctor should also know about all other medicines you are taking as many of these may make this medicine less effective or change the way it works. Generally, it is advised to avoid alcohol while on treatment.
Uses of Clamist Tablet
Benefits of Clamist Tablet
Treatment of Allergic conditions
Clamist Tablet is used to treat many different inflammatory and allergic conditions. It helps treat runny nose, sneezing, itching, and watery eyes. It works by lowering your immune system’s response to these conditions and prevents the release of substances in the body that cause inflammation. It helps relieve symptoms such as swelling, pain, itching, and other allergic-type reactions. If you are not sure why you are being given this medicine, ask your doctor.
This medicine is given orally (by mouth). You should always take it as it has been prescribed for you. Do not stop taking it without your doctor’s advice. This can cause unpleasant withdrawal symptoms. Because this medicine weakens your immune system, you should avoid being near people who are ill or have infections.
Clamist Tablet is used to treat many different inflammatory and allergic conditions. It helps treat runny nose, sneezing, itching, and watery eyes. It works by lowering your immune system’s response to these conditions and prevents the release of substances in the body that cause inflammation. It helps relieve symptoms such as swelling, pain, itching, and other allergic-type reactions. If you are not sure why you are being given this medicine, ask your doctor.
This medicine is given orally (by mouth). You should always take it as it has been prescribed for you. Do not stop taking it without your doctor’s advice. This can cause unpleasant withdrawal symptoms. Because this medicine weakens your immune system, you should avoid being near people who are ill or have infections.
Side effects of Clamist Tablet
Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them
Common side effects of Clamist
- Dizziness
- Drowsiness
- Dryness in mouth
How to use Clamist Tablet
Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Clamist Tablet is to be taken with food.
How Clamist Tablet works
Clamist Tablet is an antihistaminic medication. It blocks the action of certain chemical messengers that are responsible for inflammation, congestion, itching, and other allergic reactions.
All substitutes for Clamist Tablet
For information purposes only. Consult a doctor before taking any medicine.
Quick tips
- Avoid driving or operating dangerous machinery as it may decrease alertness.
- Avoid consuming alcohol when taking the Clamist Tablet, as it may cause excessive sleepiness or drowsiness.
Safety advice

Alcohol
UNSAFE
Clamist Tablet may cause excessive drowsiness with alcohol.

Pregnancy
SAFE IF PRESCRIBED
Clamist Tablet is generally considered safe to use during pregnancy. Animal studies have shown low or no adverse effects to the developing baby; however, there are limited human studies.

Breast feeding
CONSULT YOUR DOCTOR
Clamist Tablet is probably unsafe to use during breastfeeding. Limited human data suggests that the drug may pass into the breastmilk and harm the baby.
Larger doses or more prolonged use of Clamist Tablet may cause sleepiness and other effects in the baby.
Larger doses or more prolonged use of Clamist Tablet may cause sleepiness and other effects in the baby.

Driving
UNSAFE
Clamist Tablet may decrease alertness, affect your vision or make you feel sleepy and dizzy. Do not drive if these symptoms occur.
Caution is advised when driving or operating machinery.
Caution is advised when driving or operating machinery.

Kidney
SAFE IF PRESCRIBED
Clamist Tablet is probably safe to use in patients with kidney disease. Limited data available suggests that dose adjustment of Clamist Tablet may not be needed in these patients. Please consult your doctor.

Liver
CAUTION
Clamist Tablet should be used with caution in patients with liver disease. Dose adjustment of Clamist Tablet may be needed. Please consult your doctor.

Frequently asked questions
Clamist Tablet is an anti-allergic that works by blocking the action of a chemical named histamine, which causes allergic symptoms.
Yes, this medicine has sedative properties and can make you feel sleepy. So, it is advisable to avoid driving or indulging in any sort of activity.
No, it is not advisable to drink alcohol while taking this medicine since it can raise your risk of side effects, especially sleepiness. Talk to your doctor in case of any doubts.
You may start to feel the effects of this medicine in 2-3 hours. The full effects of this medication are usually felt after 5 to 7 hours of taking the dose.
If you accidentally take Clamist Tablet in excess, you may develop symptoms like rapid heartbeat, dilated pupils (larger than normal size) or flushing, upset stomach, and dry mouth. Contact your doctor or hospital casualty department immediately.
If you happen to miss a dose, take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up for the missed dose. Discuss this with your doctor. In order to avoid missing a dose, use a calendar, pillbox, alarm clock, or cell phone alert to help you remember to take your medication. You may also ask a family member a friend to remind you or check in with you to be sure you are taking your medication.
Fact Box
Chemical Class
Ethanolamine Derivative
Habit Forming
No
Therapeutic Class
RESPIRATORY
Action Class
H1 Antihistaminics (First Generation)
Related lab tests
References
- Briggs GG, Freeman RK, editors. A Reference Guide to Fetal and Neonatal Risk: Drugs in Pregnancy and Lactation. 10th ed. Philadelphia, PA: Wolters Kluwer Health; 2015. pp. 290-91.
- Clemastine. Brentford, Middlesex: GlaxoSmithKline Consumer Healthcare; 2000 [revised 11 Feb. 2019]. [Accessed 01 Apr. 2019] (online) Available from:
- Drugs.com. Clemastine Pregnancy and Breastfeeding Warnings. [Accessed 01 Apr. 2019] (online) Available from:
- Chaves RG, Lamounier JA. Breastfeeding and maternal medications. J Pediatr (Rio J). 2004;80(5 Suppl):S189-S198. [Accessed 01 Apr. 2019] (online) Available from:
- Central Drugs Standard Control Organisation (CDSCO). [Accessed 01 Apr. 2019] (online) Available from:

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User feedback
Once A Day
65%
Twice A Day
27%
Thrice A Day
7%
Others
50%
Allergic disorders
50%
Excellent
83%
Average
17%
No Side Effect
50%
Sleepiness
50%
With food
50%
With or without food
50%
Not Expensive
100%
Patient concerns
Allergic skin conditions in leg
Dr. Atula Gupta
Dermatology
kindly send the Pictures of affected area.
Ive got tested for hiv after 4 months of possible exposure (not sure if partner was +ve and sex was with condom) and results were negative and its been 6 months till date after the possible exposure now i was suffering from blocked nose wnd difficulty in breathing so i went to a chest specialist and was given total ige" test and the report came +ve with very highly elevated ige levels about 2000 ku/l is there anything to worry and is there any relation between total ige levels and hiv im very stressed once again please help."
Dr. Sunil Sekhri
Diabetology
IgE levels indicate that the conditions is allergic
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Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.
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- CBC (Complete Blood Count)
- FBS (Fasting Blood Sugar)
- Thyroid Profile Total (T3, T4 & TSH)
- HbA1c (Glycosylated Hemoglobin)
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