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It has been suggested that tablet 'halves' may not contain equal doses but in reality any discrepancy is likely to be minimal. It can therefore be difficult to make an even break and sometimes the 'halves' may crumble. The recommended dose is 5mg taken once a day at approximately the same time of day. The dose may be decreased to 2.5mg daily based on individual tolerability. The low dose daily tablets provide treatment on a continuous basis, although it may take several days to build-up to an effective dose.

Potential vitamins include vitamin B9 (folic acid), vitamin B3 (niacin), vitamin D, vitamin C