Jane
They did have some affiliation in 1997 but in 2009 made this announcement.
"We've done great things in the past. Today, we're doing great things for the future.
Merck Sharp & Dohme and Schering-Plough merged in 2009 to create a new company known as Merck & Co., Inc., Kenilworth, NJ, USA in the USA and Canada and MSD in the rest of the world including the UK. Today, we are the second largest."pharmaceutical company in the world.
MSD / Merck produce Bravecto and Merial Nexgard. The latest addition to this worrying class of Isoxylines is Simparica made by Zoetis. Nexgard is reportedly causing very similar adverse reactions as Bravecto in fact on the last two FDA reports Dr Elizabeth Carney received seizure reports were double those of Bravecto. Both Nexgard and Simparica come with seizure warning yet Bravecto still has not got one added to the oral in spite of the statement on the new spot on version that the ingredient Fluralaner can cause seizures in both dogs and cats even those with no previous history of seizures!