No offence to those who swear by primo tabs, but for everyone one of them there are 99 who have wasted their money. I would recommend against the, and personally believe you have a fear of needles. Primo tabs over injectable primo, dbol over an injectable?
Learn to inject. That said 20mgs daily for 5 weeks would be better than 4. Use 50mgs of proviron daily as well.
You will be suprised despite what everyone else may tell you. I used to think that way as well.
Peace