Table 1 Doses of methylxanthines injected per embryo in nanogram

Aminophylline

0.5

1.25

2.5*

3.75

5

Caffeine

0.25

0.5

0.75*

1.5

2.5

Diprophylline

1

2.5

5*

10

20

Doxofylline

1

2

3*

5

7.5

Etophylline

0.5

1

2*

3

5

IBMX

0.15

0.25

0.5*

0.75

1

Pentoxifylline

0.15

0.5

1*

2

3

Theophylline

0.25

0.5

1*

1.5

2.5

Dichloroaniline

0.015

0.05

0.1*

Metoprolol

0.005

0.01

0.018*

0.037

0.075