Man opnår imidlertid ikke større virkning ved at øge hyppigheden til mere end to gange dagligt eller dosis til over 150 mg pr. kg legemsvægt pr. dag.
The dose for children can be adjusted depending on their response to treatment (monitored by measuring the level of homocysteine in the blood), but taking Cystadane more than twice a day or in doses above 150 mg per kilogram body weight does not improve its benefit.