Can diet cleanse pills make you feel nauseous and give you after effects after you stop taking them? ... lately been feeling bad stomache pains

DON'T cleanse !: Healthtap physicians have repeatedly addressed this subject with a clear "no" answer to "cleanses." There is virtually no value to colon flushes, cleansers, enemas, irrigation machines when the technique is accomplished to "detox" or eliminate "accumulated waste." The "no" response also applies to liver detoxes! There are few real health benefits, but significant unjustified risk. Don't "cleanse".