An immunosuppressant has potent effects, and so, it becomes important for a person to follow the directives of his healthcare provider strictly. He should take only the recommended medication daily and that too at the same time. If you skip medicine one day, then it can give rise to an autoimmune disease flare-up. For a transplant recipient, missed doses can put a person at risk for some GVHD complications or organ rejection. You need to contact your provider when you miss a dose. A woman who takes immunosuppressants must have a consultation with his healthcare provider before she conceives, as a few immunosuppressants do cause some birth defects.