The recommended starting dose will be no more than 50 micrograms every day. Your final daily dose may be up to 100 вЂ“ 200 micrograms daily. Your doctor may increase the dose you take every 3 вЂ“ 4 weeks by 50 micrograms until your thyroxine levels are correct. The recommended starting dose is 50 вЂ“ 100 micrograms every day. You should usually take your tablets before breakfast or your first meal of the day. Swallow the tablets with plenty of water. If you need to have an operation, please tell your doctor or anaesthetist that you are taking levothyroxine. propanolol вЂ“ used to treat high blood pressure and heart problems.anti-inflammatory medicines such as phenylbutazone or aspirin.medicines that stimulate the sympathetic nervous system such as adrenaline (used to treat severe allergic reactions) or phenylephrine (a decongestant found in many cold and flu treatments).tricyclic antidepressants such as amitriptyline, imipramine and dosulepin.medicines to treat diabetes such as insulin and metformin.anticoagulant medicines to prevent blood clots such as warfarin.Tell your doctor or pharmacist if you are taking the following as they may be affected by levothyroxine: Ritonavir - used to control HIV and chronic hepatitis C virus.amiodarone вЂ“ used to treat an irregular heart beat.corticosteroids such as hydrocortisone and prednisolone вЂ“ used to treat inflammation.androgen containing medicines for male hormone replacement therapy.oestrogen containing medicines for hormone replacement therapy (HRT) and contraception (the вЂpillвЂ™).beta blockers such as atenolol and sotalol вЂ“ used to treat high blood pressure and heart problems.imatinib вЂ“ used to treat certain types of cancer.medicines containing iron that are taken by mouth.polystyrene sulphone resin вЂ“ used to reduce high levels of potassium in the blood.cholestyramine and colestipol вЂ“ used to treat high level of fat in the blood.sucralfate вЂ“ used to treat and prevent stomach and duodenal ulcers.proton pump inhibitors such as omeprazole, lansoprazole and pantoprazole - used to reduce the amount of acid produced by the stomach.cimetidine вЂ“ used to reduce excess stomach acid.sertraline вЂ“ used to treat depression and anxiety disorders.medicines for epilepsy such as carbamazepine, phenytoin, primidone and barbiturates.Tell your doctor or pharmacist if you are taking the following as they may affect the way that levothyroxine works: If your symptoms persist you may need a specific brand of levothyroxine to be prescribed. You should tell your doctor if you get any side effects so that your blood can be checked for levels of thyroid hormone. Patients occasionally find that they feel less well when changing from one levothyroxine medicine to another. This includes over the counter medicines, herbal remedies and vitamin supplements. Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines. Other medicines and Levothyroxine Tablets:

Levothyroxine and insomnia help