1. Pregnancy Safety: Deriphyllin Retard 300 Tablet contains Etofylline and Theophylline, classified as Category C for pregnancy. This means risk cannot be ruled out, and it should only be used if benefits outweigh risks.

2. Risks: Theophylline can cross the placenta and may affect the fetus. Limited data is available on Etofylline's safety during pregnancy.

3. Recommendation: Consult your obstetrician before taking this medication. They will assess your health condition and may suggest safer alternatives.

4. Monitoring: If prescribed, ensure close monitoring of both mother and fetus to detect any adverse effects early.

Always seek professional medical advice during pregnancy to ensure safety for you and your baby.