However, Inderal does make some people drowsy, and certain over-the-counter antihistamines can make you drowsy, as well.

There are some medicines that you need to avoid, such as certain antihistamines and motion sickness medicines.

Also, report use of any medicine that can make you drowsy, such as: sedatives, tranquilizers, anti-anxiety medicine, anti-seizure drugs, narcotic pain relievers (e.g., codeine), psychiatric medicines, certain drowsiness-causing antihistamines (e.g., diphenhydramine).

Urbanski and Marval had requested a certain antihistamine from the American medical personnel on Saturday night, only to learn the supply was depleted.

For example, some routine treatments, such as certain antihistamines, when administered to aviation personnel, are cause for temporary grounding (loss of flying privileges) until the therapy and its effects are completed.