Many medications can be doubled in strength and split. If your medication is a time released form also be sure and ask about the possible side effects of switching to a non-time released medication, ask if there is a reason why they put you on a time released med. Not all medications can be switched. It could be a matter of the half-life of the medication, controlled release may be because of keeping a constant titer versus a up and down effect. For example, Cardizem can be given in a non time released method or a extended released form. Problems of the short acting is the half-life of the medication, which many people experience ups and downs in their heart rate, the extended release form helps to control a steady state to prevent the ups and downs and to maintain a healthy blood pressure. So be sure and ask why you take the time release, what possible problems you could have if you switched, and if their is a risk of toxicity. Also check with your pharmacist and see if it would be cost effective to switch to something that you will have to take 3 times a day versus once a day, if it comes in a generic form, what the difference is in the generic drug, (most cases of the generic form contains a different inactive ingredient but I have seen allergic reactions happen with generic forms, so it is best to ask what that inactive ingredient is just in case you may have an allergy to it).