The pharmaceutical composition 13, wherein {HEAD ~ the composition} comprises as gel forming agent a phospholipid, respectively a phospholipid mixture, which contains {TAIL ~ at least 60%} by weight phosphatidylcholine 
The pharmaceutical composition 13 , wherein { HEAD ~ the composition } comprises as gel forming agent a phospholipid , respectively a phospholipid mixture , which contains { TAIL ~ at least 60 % } by weight phosphatidylcholine
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH