Subcutaneous administration of nifedipine.

Contents of a 10 mg nifedipine capsule (0.33 ml) were withdrawn by syringe and administered subcutaneously to a patient with hypertensive urgency due to misinterpretation of a physician's order. The drug apparently had its desired hypotensive effect and no adverse effects were noted. The literature on use of nifedipine in hypertensive urgency is reviewed. Subcutaneous administration is not recommended because of a lack of suitable controlled studies and the potential for adverse effects.