Image: 4 panels organized in a rectangle following a sequential order like a comic strip. The first panel is of a man with a very serious face stating, "Hey man, got any diphenhydramine?" The second panel is a grainy picture of the actor Robert Downey Jr. with a slightly inquisitive face and saying, "What's that?" The third panel is an identical copy of the first image and saying, "Benadryl the allergy medicine." The fourth and final panel is a grainy picture of Bobby rolling his eyes and taking a deep breath.
Edit: Tony Start -> Robert Downey Jr. I didn't know that Tony Stark was a character Robert Downey Jr. played ๐คฆโโ๏ธ
Generic drug names are widely used in the UK and europe - we don't have US style advertising. There are brands but they don't cut through in the same way when generics are so widely known and mandated for prescriptions coming from the NHS too.
Benadryl isn't even a specific drug, it's just a brand with different drugs in different countries (cetirizine in the UK). I'd just say "antihistamine".
Also brand name drugs are largely a scam - pharmaceuticals are heavily regulated and generics are the exact same drug. Save yourself some money, learn the generic names and buy those. Otherwise you're just paying the drugs company for their advertising and the big price mark up for their profit as a "premium" brand.
Here in Portugal the prescriptions even say how much the generic medicine should cost, so that you immediately know if the pharmacy is trying to sell you more expensive medicine.