Limitations: This safety classification applies only to preparations containing a combination of the two drugs dipyridamole and acetylsalicylic acid. The same ATC-code (B01A C30) can in some countries be used for different combinations of acetylsalicylic acid and other drugs, which in theory may be porphyrinogenic. Please refer to the classification and monograph of each individual substance. If the combination contains a substance which is not classified (NC) or has been classified as porphyrinogenic (PRP or P), the safety classification of such a combination as PNP is no longer valid. Combination products which contains the two substances dipyridamole (ATC code: B01A C07) and acetylsalicylic acid (ATC: B01A C06) are safety classified as Probably not porphyrinogenic (PNP). Dipyridamole is safety classified as Not porphyrinogenic (NP) while acetylsalicylic acid is safety classified as Probably not porphyrinogenic (PNP). The classification of this combination is according to the most porphyrinogenic of the two substances. For more details please refer to the monographs of the two substances.

Uneventful use reported in 1 patient with acute porphyria.