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Discover 20,904 clinical trials near Philadelphia, Pennsylvania. Find research studies in your area.
Showing 1261-1280 of 20,904 trials
NCT05751278
The purpose of this study is to compare the effectiveness of transbronchial biopsy done by a 1.1mm cryoprobe versus the standard 2.0mm forceps.
NCT06972056
This goal of this study is to compare three medications used for migraine preventive treatment. This study will compare atogepant, a newer migraine preventive medication, with two older preventive medications, topiramate and propranolol. It will be determined if one works better and is more tolerable than the others. Research participants will: * Be randomly assigned to one of the three medications. * Provide information about their migraine pattern using a daily headache diary and during research visits.