The real advantage of these medications is that they're actually quite well tolerated. They actually don't have much in the way of side effects initially.
If you're going to prescribe a medication, whether it's in Canada or on Kandahar airfield, first of all you want to see that the person is tolerating the medication. So my practice is that if they're going to accept a prescription, they get some counselling on what side effects are most common, what they might expect, how to deal with the nuisance level of side effects. Then I get them back fairly shortly after they start the medication to see how it's sitting with them. If it's causing them problems, then we can look at alternatives.