After 10 years, 3 months and 4 days without a sip of alcohol, I filled up my glass to mix my daily dose of a fibre supplement drink. ( I need it after losing a length of bowel from cancer surgery.) After about three swallows I noticed it tasted 'funny' and put it down. To my horror, I had used the glass which contained the remnants of my wife's vodka and tonic! She assured me that it isn't counted as an alcoholic drink as it was a genuine mistake. I'm NOT going to start counting the days from zero again! But it was quite disappointing. Please don't make me count it as an alcoholic drink. 😢
That probably didn't have anywhere near the concentration of a "drink". I'd imagine there's more in a shot of Nyquil or the like.
Do not worry and this is NOT your fault. What an achievement. By 31st Dec I have celebrate 5 yrs sober. Robin
It is for no-one else to say whether you should 'count' it or not. Personally, I think it would be silly to count it. Seriously John, don't think twice about it or you are going to start obsessing and that is when the danger will come.
In my opinion, your sobriety is as solid as it was 10 yeas, 3 months and THREE days ago - and any recovery program that makes you punish or shame yourself for an unintentional mistake like this is not worth the paper it is written on!
I agree with what the others have said... the length of time is obviously very important to you as you have even after 10 years, have the exact time down to the day. It does not by any means sound like you want to start drinking again out of your own free will. This was a mistake, write it off as a silly blip that wasnt meant. If you had meant to do it, maybe that would be different but you didnt. Give yourself a break and feel good that you have got this far. Well done 
Thanks all. Yes I do have a thing about numbers, time etc. I know the exact time of day when I threw my last drink out the window. (It was Summer here.) I am more annoyed than anything, as I know it was accidental and have no desire to start again. I won't count that as a drink! Best wishes to all.
You certainly kept that resolution! Well done Robin. You must feel great!
Glad you seem happier, you have done ever so well, an inspiration by the way
I think I would laugh it off - you have done fantastically well with such willpower - and to do it whilst your wife still enjoys a tipple - double willpower - respect.
I sometimes walk down the wine aisle in Tesco and think of all the money I spent and how many secrets and the SHAME...not worth trying "one more drink".....well done to you as well. Amazing. Robin
Are you kidding? Keep your well earned achievement. High five!
JulieAnne
I am sure all the replies on here have made you feel so much better John.Of course it cant count ,completely unintentional and you are sober! Just make sure you rinse the glass out in future 
Lesson learned! Very sound advice...