not necessarily. some medications are blood level medications. if your doctor has you taking 2 pills at different times if day, it may be related to this issue. - also, some medications need to be administered in separate doses, as the therapeutic dose may be quite high and to take the two lower doses is safer than taking one large dose. - another option is the "life" if the medication is shorter. for instance, especially with mood altering drugs, if the doctor is wanting the medication at a certain level in your body for 24 hours a day, he might order a certain dose over 2-3 times a day. most drugs have a gradual build up to therapeutic level then a gradual decrease in medication until no medication. that is the "life" of the med.