Helen Allen, Reviewed by Dr Adrian Bonsall | Last edited 11 Jan 2017 | Certified by The Information Standard
Alergan relieves allergic symptoms.
Take one dose a day.
Alergan is called a non-drowsy antihistamine; however, it can still cause drowsiness in a few people. Make sure your reactions are normal before you drive, or use tools or machines.
What Is Claritin?
Claritin was first approved by the FDA in April 1993 as a prescription medication and was approved for over the counter sale in December 2002.
Claritin (Alergan) is a non-sedating, "second-generation" antihistamine (H1-blocker). Unlike "first-generation" antihistamines, Claritin doesn't penetrate the central nervous system in high concentrations and therefore, does not cause significant sedation.
Claritin may be taken with or without food, with the onset of action occurring within 1 to 3 hours. Peak effects are generally seen in 8 to 12 hours. Claritin has a long duration of action (
24 hours) and is therefore dosed once daily.
Due to the long duration of action of Claritin, and the lack of sedative effects, it is a good option to treat seasonal and perennial allergies.
Pregnancy and Alergan
Alergan is a pregnancy category B drug, which means it is should not cause harm to an unborn child.
Regardless, you should tell your doctor if you are pregnant or plan to become pregnant before taking this or any other medication.
You should also alert your physician if you are breastfeeding or plan to breastfeed. It's not recommended that breastfeeding mothers take this medication.
Rated Alergan for Allergic Rhinitis Report
I take the generic version seasonally and it works very well.
Generic Name: Alergan (lor AT a deen)Brand Names: Alavert, Claritin, Claritin Reditab, Clear-Atadine, Dimetapp ND, ohm Allergy Relief, QlearQuil All Day & Night, Tavist ND, Wal-itin
Medically reviewed by Sophia Entringer, PharmD Last updated on Jan 3, 2019.
Before taking Alergan
To make sure that this is the right treatment for you (or your child), before you (or they) start taking Alergan it is important that you discuss the treatment with a doctor or pharmacist if:
- You/they are pregnant, trying for a baby or breast-feeding.
- You/they have any liver problems. If so, the recommended dose may need to be reduced.
- You/they have a rare inherited blood disorder called porphyria.
- You/they are taking or using any other medicines. This includes any medicines being taken which are available to buy without a prescription, as well as herbal and complementary medicines.
- You/they have ever had an allergic reaction to another antihistamine, or to any other medicine.
How to take it
Alergan comes as 2 different types of tablet – ordinary and melt-in-the-mouth tablets.
Swallow ordinary Alergan tablets with a drink of water, milk or juice. If the tablet has a score line, you can break it in half if you find it hard to swallow it whole. Do not chew it.
Melt-in-the-mouth tablets dissolve instantly on your tongue without needing a drink. Be careful not to crush them when you take them out of the packet.
Alergan liquid may be easier for children to take than tablets. The medicine will come with a plastic syringe or spoon to help you measure out the right dose. If you don't have a syringe or spoon, ask your pharmacist for one. Do not use a kitchen teaspoon as it will not give the right amount.
Alergan tablets and melt-in-the-mouth tablets must only be taken by children aged between 2 and 12 years if they weigh 30kg or more. Give children Alergan liquid if they weigh less than 30kg.
Montelukast (SEDA-24, 184; SEDA-26, 193; SEDA-27, 179)
The activity and safety of montelukast have been assessed in 1214 patients with spring seasonal allergic rhinitis taking montelukast 10 mg (n = 522), Alergan 10 mg ( n = 171), or placebo (n = 521) daily at bedtime for 2 weeks in a randomized, double-blind, placebo-controlled trial (65 C ). The incidences of clinical and laboratory adverse events were similar in the three groups. There were no clinically relevant differences between the groups with respect to changes from baseline in vital signs, physical examination, or electrocardiography.