Such a harmful pills.

Am heard,that analgin is bad for blood, maybe Am needing changing his for a headache attack fighting.
As for a first time headache if a reason is hypertension you cannot use analgesics, they are  rising pressure more, and if headaches are often, you not using pills, you need find a reason, and analgin is suppressing activity for brain , lowering forming are new blood cells, and if use 5 pills everyday within month, thus blood structure will be a bad, and leading to dead, as and vitamin c if abundant taking, regular using more than one gr, and to stop course,thus scurvy signs display, as any substance and poison are depending from dose, so if headache having rare, you  can use one pill of analgin, but you can change on alternatives are paracetamol, citramon, spazgan, and  headaches reasons are many, analgetic fighting are consequences,am advising you for investigation.