In this task you are given a medical question pair hand-generated. Your task is to classify a given post into two categories 1) 'Similar' if the given two questions have a same connotation 2) 'Dissimilar' if the given two questions have a different connotation or meaning.

Q: Sentence1: Can gabapentin work for headaches caused by trimethoprim. I have started taking 100mg gabapentin daily for 4 days and trimethoprim 200mg twice a day. 
 Sentence2: I was diagnosed with a urine infection for which I was given Trimethoprim 200 mg to be taken twie daily. I have developed headaches because of the medication. Would it be safe to take Gabapentin?

A: Similar
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Q: Sentence1: Sure I am not pregnant right? . If I have polycystic ovary periods can get ireegular right? 
 Sentence2: I missed my period and I had protected intercourse but the condom slipped, I am not sure if he ejaculated inside vagina. I have PCOS and my cycles have always been irregular. Should I be worried about pregnancy?

A: Similar
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Q: Sentence1: Dry, flaky skin on the outer skin of lips all the time. Why does this happen? 
 Sentence2: What causes dry and flaky skin around the lips? I seem to have it all the time. 

A:
Similar
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