<s>[INST] Hello doctor, I am a 57-year-old man. I had an angioplasty a year ago and had one stent placed. After the treatment, the following medicines were prescribed (listed below). After having the medicines, I am having a severe headache. Please suggest if the medicines prescribed has any role in the this.  Tablet Ecosprin 75 mg OD Tablet Plavix 75 mg BD Tablet Aztor 40 mg Tablet Cardace 2.5 mg OD Tablet Metolar XR 2.6 mg Tablet Nikoran 5 mg BD Capsule Pantocid 40 mg OD [/INST] Hello. The drug Monit GTN 2.6 mg (Nitroglycerin and Glyceryl Trinitrate) which you are using for ischemic heart disease causes vasodilatation and gives a severe headache. The starting of this may give rise to more problems as compared to after few months. You may need simple painkiller like tablet Ultracet (Paracetamol and Tramadol) at the starting of your treatment. Consult your specialist doctor, discuss with him or her and with their consent take the medicine. Sometimes it may cause hypotension which may cause giddiness. It is dangerous if you use drugs for erectile dysfunction along with this drug. Around 60% to 80% of people who are using this medication may experience a headache. For more information consult an internal medicine physician online --> </s>