Do antihistamines affect sleep?
Antihistamines can affect sleep by causing drowsiness in some types and improving nighttime sleep in others. Older types often make people feel sleepy during the day and may disrupt overall sleep quality. Newer types tend to help people fall asleep faster at night with less daytime sleepiness.
Key points:
- Older antihistamines cause daytime drowsiness and poorer sleep quality.
- Newer antihistamines shorten time to fall asleep and boost nighttime sleep.
- Both types increase sleepiness overall but differ in daytime effects.
- Long-term use may reduce benefits due to tolerance.
This text has been fact-checked for accuracy by medino's clinical team.