<s>[INST] Can tiredness and forgetfulness be caused by my asthma medication? [/INST] No, but if you are not sleeping well because you have poorly treated asthma, you can become tired and forgetful.Theophylline and related medications can also adversely affect your sleep and may therefore make you feel tired indirectly. If you suspect something like this, discuss it with the doctor who treats your asthma.The older antihistamines can make you feel drowsy. If you use these medications for hay fever or other allergies and feel tired, you should talk to your doctor about possible alternative medications. If you are allergic to pollen, it is also possible that this causes you to feel tired during the pollen season. Source: Ginasthma. Link: https://ginasthma.org/about-us/faqs/. Field: Lung Disease. Disease: Asthma </s>