A certain elderly man has to take two anti-cancer drugs Xeloda and Zanosar everyday, at 1 tablet of each drug.
Problem is that both come in blue square pills of same size, weight etc.
He keeps these drugs in two separate small bottles.
One day when taking the medications, he found that he had three pills in his hand, 2 Xeloda and 1 Zanosar, but he cannot figure out which one is which.
Now he must take his meds every day otherwise his cancer will get fatal.
Also anti-cancer drugs are so strong that he cannot take more than 1 tablet or he will have severe side effects.
Question: So what can he do?
Do not say throw away the pills, there are costly as hell.
[Post your answers with explanation in the comments]
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