Re: combat sides from clen?????
They almost certainly won't just go away no. They will seem to have eased as your adjust to them but they will likely be the same.
Order LOTS of Potassium, its like £3 from Holland and Barratt, think about 1-2 grams a day, or jack up on potassium rich foods. Try googling Clenbuterol Potassium Foods and see what comes up as many people post about this.
Jack up the Taurine intake too, think 2-3 grams taurine as well, energy drinks like the cheapo emerge from netto, and the tablets etc.
Both will help, also increase your water intake, as the headaches are likely to be water or lack of.