Hello,I would love to help I just have a few additional questions. After your reply please allow a few minutes for me to type your answer.
What brand of cough drop was this?
How much does your dog weigh?
It is CVS pharmacy Menthol cough drops.menthol, glycose syrup, eucalyptus oil and flavorings
She weighs about 40 pounds
Ok good. Thankfully as long as there is no Xylitol in the drops then they are non toxic and there should be no problems at all from eating one cough drop.
I hope this helps ease your mind. Please reply back if you have additional questions