4 doctors weighed in:
Does Benadryl (diphenhydramine) cause vivid dreams?
4 doctors weighed in

Dr. Michio Abe
Internal Medicine
2 doctors agree
In brief: Paradoxical effect
People often feel groggy and less rested in the morning after taking benadryl (diphenhydramine).
Sleep is composed of repetitive cycles of non-rem and rem sleep. Dreams during rem sleep tend to be vivid, visual and story-like. It is thought that Benadryl (diphenhydramine) affects our rem sleep, possibly by decreasing it. Why decreased rem sleep causes vivid dreaming is a mystery, but it can. It's also common with antidepressants.

In brief: Paradoxical effect
People often feel groggy and less rested in the morning after taking benadryl (diphenhydramine).
Sleep is composed of repetitive cycles of non-rem and rem sleep. Dreams during rem sleep tend to be vivid, visual and story-like. It is thought that Benadryl (diphenhydramine) affects our rem sleep, possibly by decreasing it. Why decreased rem sleep causes vivid dreaming is a mystery, but it can. It's also common with antidepressants.
Dr. Michio Abe
Dr. Michio Abe
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Dr. John O'Malley
Pediatrics - Psychiatry
In brief: Nightmares Rarely
Benadryl (diphenhydramine) is a very effective medication for allergies and sleep in children.
Of course, there are rare side effects that occur including nightmares. Stop the medication and find an alternative from your doctor if these dreams continue to occur. Vivid dreams are another issue and rest with the person experiencing them (probably form benadryl). Some people find them satisfactory.

In brief: Nightmares Rarely
Benadryl (diphenhydramine) is a very effective medication for allergies and sleep in children.
Of course, there are rare side effects that occur including nightmares. Stop the medication and find an alternative from your doctor if these dreams continue to occur. Vivid dreams are another issue and rest with the person experiencing them (probably form benadryl). Some people find them satisfactory.
Dr. John O'Malley
Dr. John O'Malley
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