Jas, if once u start, it has to be taken all the way till 26 weeks, then better not, right? Safer to err on the side of caution. The pharmacist at my antenatal class was saying, that only if the benefits to the mother far outweight the harmful effects to the baby, then the medication can be taken. But even then, should stop it once the mother is fine.
Even the steroids cream my gynae prescribed me for my rashes, I only used it for 3 days, then stopped once the rashes cleared up a bit. Scared to continue.