Option-1  from C arbamide Forte .  It delivers  49.5 mg/Rs Option-2   from C arbamide Forte . It delivers  45 mg/Rs. Option-3   60 x 175 mg for 298 Rs/ Valdos ; ; implies that  35.23 mg/Rs Option-4   from   Carbamide forte ; implies that  33.1 mg/Rs. Option-5   120 x 156mg for 569 Rs / Carbamide forte ; implies that 32.9 mg/Rs Option-6   120 x 175 mg for 664 Rs/  HealthyHey ; implies that  31.6 mg/Rs Option-7   30 x 440 mg for 427 Rs/  Tata 1mg ; implies that  30.9mg/Rs Option-8   30 x 320mg for 378 Rs/  Zenith ; implies that  25.4 mg/Rs Option-8   60 x 220mg for 649 Rs/ Carbamide Forte ; implies that 20.3 mg/Rs Footnotes: Tablets containing MgO may not be well digested by some, although rare. It will certainly help to take it along with food. Most magnesium salts cross the blood-brain barrier anyway. The BBB (Blood-Brain Barrier) matters only if you're acutely deficient in Mg ...