I had Implanon inserted January 6, 2014 and February 1, 2014 I developed a cough. There is no blood. Here it is March 3, 2014 and I am still coughing. I have gone to the doctor and they have put me on Tessalon Pearls in addition to the Allegra and Nasonex that I already take. I also found a lump on the back of my neck after seeing my doctor and went back and he prescribed me an antibiotic and a referral to an ENT. I just think that it is strange that I have not ever had a cough like this before and I get it just 3 weeks or so after having it inserted.