How long after taking Claritin (loratadine) will you feel better?

1-2 hours. While Claritin (loratadine) is rapidly absorbed, it takes about1.2 hours to reach maximum concentration in the body. If taken with food this can delay it another hour. Therefore, about 1-2 hours.
1 hr if... Claritin (loratadine) starts to work in about an hour but it may not work on everyone.