First of all: you need to know what each medicine is for.
1) Albuterol: is NOT a cough medicine. NOR for 'congestion.'
It is a Bronchodilator.
To open up the bronchial tubes when it is inflamed and constricted. When airways are constricted... a person cannot breathe... nor normally, nor get enough oxygen into their lungs or blood-stream.
It is used, for Asthma.
2) Benadryl: is an Antihistamine. Per allergies. It dries up, mucus and mucus membranes and reduces histamines in the body.
It is NOT, a cough medicine.
Now: "Congestion" is due to:
1) Mucus
2) Mucus in the Sinuses & nasal passages
3) or Mucus in the Chest.
Now: I have had Asthma since I was a child. Hence, I know what Albuterol is, and I use it.
BE AWARE of any side-effects.
Such as, causing hyperactivity or racing heart etc.
Your child is so young... just a newborn.
I would NOT NOT NOT, give your infant, Benadryl.
You do NOT know how much, and... please bear in mind, an Infant this young... does not have fully developed Kidney's nor organs.... AND IF YOU OVERLOAD and Infant with all this stuff... you can, OVER-Load the Kidneys too. And the kidneys may not be able to clear it.
Your baby is a very young infant.
What exactly is the dosage of Albuterol for your baby?????
If given too much... it can even make the situation, worse... and increase side-effects.
Why, did your Doc, prescribe these things????
Congestion, can be from the head or chest. Or BOTH.
And you gotta... make sure baby is not getting worse or getting secondary infections... or... Pneumonia.
Because infants do not have, matured lung development yet.
DO NOT just willy-nilly mix medications.
You cannot just give a baby this young, anything.
Our Pediatrician, said NOTHING, no over the counter drugs... when this young.
My Dad, before he died, (just as an example), had a cold/cough. His Doc prescribed cough syrup with Codeine in it.
Do you know, that because he was so ill... and his organ functioning was not up to par... his body could not clear nor properly process the Codeine from his Kidneys, and he almost died. Because of a typical cough syrup.
I bring this up about my Dad... because, Benadryl has a "drowsiness" component to it. Like Codeine. Although they are NOT the same family of drugs.
For a Newborn, who knows what the dosage is, or if appropriate.