http://www.prescriptiondrug-info.com/threads/breathless-from-levothyroxine-D74760_s2.htm Recent Posts About breathless from levothyroxine at The People's Medicine Community. My dosage was just increased,150 MCG,and was wondering if this drug can cause shortness of breath? en-us Copyright 2009 Prescription Drug Info All Rights Reserved. 11/21/2009 4:25:55 PM 20 http://www.PrescriptionDrug-Info.com/threads/breathless-from-levothyroxine-D74760_s2.htm#157988 Yes it can. My doctor was overmedicating me without realizing it and I had shortness of breath. I was also eating more and very tired. I Tue, 13 May 2008 05:48:25 -0800 http://www.PrescriptionDrug-Info.com/threads/breathless-from-levothyroxine-D74760_s2.htm#157438 Hi Linda, <br> <br>This may indicate an allergic reaction: <br> <br>&quot;Allergies to the medicine are unlikely, but if the patient develops a severe reaction to this drug such as difficulty breathing, shortness of breath or swelling of the face and tongue it is imperative that the patient immediately seek medical attention.&quot; <br> <br>Please get in touch with your prescribing physician asap... <br> <br>More information: <a href=http://www.prescriptiondrug-info.com/drug_information_online.asp?title=Levothyroxine&page=1001133&ad=true#Dosage.2C_precautions_and_side_effects class=bodyhref>Levothyroxine Details</a> Sun, 20 Apr 2008 16:12:47 -0800