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Guidelines for ATC classification and DDD assignment - WHOCC

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C04AC Nicotinic acid <strong>and</strong> derivatives<br />

Includes low strength preparations (e.g. nicotinic acid tablets 50 mg).<br />

Nicotinic acid preparations in high strength (e.g. nicotinic acid tablets<br />

500 mg) is used as a cholesterol reducer <strong>and</strong> is classified in C10AD.<br />

C04AD Purine derivatives<br />

Combinations with nicotinic acid <strong>and</strong> derivatives are allowed at each 5th<br />

level.<br />

C04AE Ergot alkaloids<br />

C04AF Enzymes<br />

Includes combinations with other peripheral vasodilators.<br />

Combinations with calcium channel blockers are classified in<br />

C08CA.<br />

See also G02AB <strong>and</strong> N02CA.<br />

C04AX Other peripheral vasodilators<br />

Betahistine, cinnarizine <strong>and</strong> flunarizine are classified as antivertigo<br />

preparations in N07CA.<br />

Papaverine preparations, see A03AD <strong>and</strong> G04BE.<br />

C05 VASOPROTECTIVES<br />

No <strong>DDD</strong>s are established in this group, since most of the drugs in<br />

this group are <strong>for</strong> topical use.<br />

C05A AGENTS FOR TREATMENT OF HEMORRHOIDS AND ANAL<br />

FISSURES FOR TOPICAL USE<br />

This group comprises agents <strong>for</strong> local use, such as suppositories,<br />

ointments etc. Preparations used <strong>for</strong> treatment of perineal trauma are<br />

classified here.<br />

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