Solid pharmaceutical compositions comprising biopterin derivatives and uses of such compositions
The present invention relates to solid pharmaceutical compositions comprising biopterin derivatives as well as methods for obtaining such solid pharmaceutical compositions. The invention also relates to the solid pharmaceutical compositions of the invention for treating diseases.
1. A solid pharmaceutical composition comprising
a) a compound having the formula (I):
and/or a compound having the formula (II):
and
b) two different sodium phosphate salts, wherein the two different sodium phosphate salts are NaH 2 PO 4 .2 H 2 O and Na 2 HPO 4 .2 H 2 O, and wherein the quantity of the NaH 2 PO 4 .2 H 2 O and Na 2 HPO 4 .2 H 2 O present in the composition is chosen such that the molar ratio of both NaH 2 PO 4 .2 H 2 O and Na 2 HPO 4 .2 H 2 O to compound (I) or compound (II) ranges from 0.02 to 0.5.
2. The pharmaceutical composition of claim 1 , wherein the compound (I) and/or the compound (II) are present as the free base.
3. The pharmaceutical composition of claim 1 , wherein the pharmaceutical composition is a lyophilized pharmaceutical composition.
4. The pharmaceutical composition of claim 1 , wherein the pharmaceutical composition comprises an additional pharmaceutical excipient.
5. The pharmaceutical composition of claim 4 , wherein the pharmaceutical excipient is an inorganic salt.
6. The pharmaceutical composition of claim 5 , wherein the inorganic salt is NaCl.
7. The pharmaceutical composition of claim 1 , wherein the composition further comprises crystallization water.
8. The pharmaceutical composition of claim 1 , wherein a unit dosage of the composition contains 650±60 mg of the free base of 4-Amino-(6R,S)-5,6,7,8-tetrahydro-L-biopterin or of 4-Amino-7,8-dihydro-L-biopterin, 140±30 mg of water of crystallization, 70±7 mg Na 2 HPO 4 .2 H 2 O, 16.5±2 mg NaH 2 PO 4 .2 H 2 O, and 350±30 mg NaCl.
9. A method for preparing a lyophilized solid pharmaceutical composition comprising:
a) a compound having the formula (I):
and/or a compound having the formula (II):
and
b) two different sodium phosphate salts, wherein the two different sodium phosphate salts are NaH 2 PO 4 .2 H 2 O and Na 2 HPO 4 .2 H 2 O, and wherein the quantity of the NaH 2 PO 4 .2 H 2 O and Na 2 HPO 4 .2 H 2 O present in the composition is chosen such that the molar ratio of both NaH 2 PO 4 .2 H 2 O and Na 2 HPO 4 .2 H 2 O to compound (I) or compound (II) ranges from 0.02 to 0.5, and optionally NaCl;
the method comprising:
aa) dissolving the compound of the formula (III) and/or (II):
with a buffer, wherein the buffer comprises the two different sodium phosphate salts;
bb) lyophilization of the solution obtained in aa).
10. A method for preparing an injectable solution comprising:
a) a compound having the formula (I):
and/or a compound having the formula (II):
and
b) two different sodium phosphate salts, wherein the two different sodium phosphate salts are NaH 2 PO 4 .2 H 2 O and Na 2 HPO 4 .2 H 2 O, and wherein the quantity of the NaH 2 PO 4 .2 H 2 O and Na 2 HPO 4 .2 H 2 O present in the composition is chosen such that the molar ratio of both NaH 2 PO 4 .2 H 2 O and Na 2 HPO 4 .2 H 2 O to compound (I) or compound (II) ranges from 0.02 to 0.5, and optionally NaCl;
the method comprising:
aa) dissolving the compound of the formula (III) and/or (II):
with a buffer, wherein the buffer comprises the two different sodium phosphate salts;
bb) lyophilization of the solution obtained in aa);
cc) reconstituting the lyophilizate obtained in bb) in a pharmaceutically acceptable fluid for the preparation of an injectable solution, wherein the lyophilizate obtained in bb) is filled into a vial.
11. The method of claim 10 , wherein the lyophilizate obtained in bb) is filled into a vial in an amount of about 1-1.5 g solid formulation.
12. The method of claim 11 , wherein the lyophilizate obtained in bb) is filled into a vial in an amount of 1.25 g solid formulation.
13. The method of claim 10 , wherein the lyophilizate obtained in bb) is filled into a 50 mL vial.