its is like that for some people...it actually depends on how strong you body is!
but the optimum dosage is 4.5mg ....what ever above that is totally useless...that will account for u intaking 0mg...the rest will cancell out!
one of my friends had the smane problem
his legs started getting heavy....even his family members started asking hum if he need to continue with tha same medications coz his condition was going from bad to worse...he asked me what to do...I said 3mg ia for "weaker" people and he might want to shift to that.
BUT he stuck to 4.5mgs...coz we are in India and its cost us 180$ thats about 8000 rupees for 3 months...hard to afford out here....and he had 2 months of medicines left....so either he used the medicines or wated them...he dicided to use them and now he feels very good!!!
keep up with 4.5 don't be scared and go for it!