I have been getting these really bad headaches since i started HGH. They feel very similar to the type of headache i got from taking a high dose of viagra.

As a result i am thinking this has to do with blood pressure. I have been reading that the water retention of hgh can cause high blood pressure. I am going to buy a BP monitor today, and start checking it. I have always had a bp on the higher end, but well within the normal range.

Has anyone else had this happen?

The headaches seem to have decreased in intensity over the last week. Maybe they go away as the body becomes accustomed to the HGH?