Yes, it's possible for antihistamines to lose effectiveness over time, as your histamine receptors will down-regulate (get used to and compensate for) the drug.
I have this problem with all drugs that affect histamine receptors. I can only take drugs like these once or twice a week or they stop being effective. It could just be me, though, with this type of problem.
- Loratadine Information for Consumers
- Loratadine Information for Healthcare Professionals (includes dosage details)
- Side Effects of Loratadine (detailed)
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
Posted 13 Jun 2011 • 1 answer
Posted 30 Jun 2011 • 1 answer
Posted 14 Jan 2012 • 1 answer
Posted 6 May 2015 • 1 answer
Posted 25 Mar 2016 • 1 answer