Hi Sir/Madam Welcome to Health Care Magic I can certainly understand your concern Implanon may cause insomnia which is one of the common side effect but it is very common in females.could you please specify your gender...As it is not much common in men..The reason could be due to depression as it one of the commonest side effect. In depression, insomnia and difficulty in falling asleep or maintenance of sleep is the key feature in its criteria.i would suggest you drugs like escitalopram and clonazepam to get better from depression if any and insomnia respectively. It s better to consult your gynaecologist regarding the continuation of implanon Post your further questions if any, I will available to take up your follow up questions Thank you