If you mean an asthma inhaler/puff, my senior gynac at Apollo clearly told me it's absolutely safe and crucial to keep asthma under control. Please don't stop your prescribed inhalers without consulting your doctor or hospital staff.
I used my inhaler throughout my pregnancy and now my toddler is perfectly healthy and running around. Don't worry about using it if you need it to breathe properly, just consult your doctor once.
Having PCOS made me second guess every single medicine and food. If it's an inhaler, please don't stop it abruptly as breathing issues can affect your oxygen levels. Just confirm with your doctor once to be completely sure.
Asthma inhalers (puffs) are generally local action and don't affect the baby, so they are safe. In fact, keeping your oxygen levels good is vital for the baby. Just let your gynac know which brand you use.
I think if it's an inhaler puff, it is important for your breathing. I am trying to conceive and also worry about these small things, but please ask your doctor gently so you can stay stress-free.
Wait, if you mean a bakery puff (veg puff/egg puff), be careful as it's full of maida and can spike blood sugar. I had gestational diabetes and had to strictly cut down on bakery items. If you meant asthma puff, that's a medical thing so check with your doctor.