White to off-white, oblong shaped tablets with one score-line on each side and marked with "S" (on the 4.8 mg tablets), "M" (on the 7.2 mg tablets), "L" (on the 21.6 mg tablets) or “XL” (on the 31.6 mg tablets) on each half of the top side.
The tablets can be divided into two equal halves.