Thyrox: what's in it, and is it OK in pregnancy?
Thyrox is a brand name, not a single medicine. What matters in pregnancy and while breastfeeding is what's inside it.
In short
Thyrox contains levothyroxine.
What's in Thyrox
| Product (as NPPA lists it) | Composition (NPPA's wording) | Company |
|---|---|---|
| THYROX 100 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 100 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 100 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 100 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 112 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 112 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 12.5 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 12.5 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 125 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 125 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 12.5 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 12.5 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 125 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 125 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 150 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 150 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 150 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 150 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 200 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 200 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 200 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 200 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 25 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 25 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 25 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 25 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 37.5 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 37.5 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 37.5 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 37.5 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 50 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 50 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 50 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 50 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 62.5 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 62.5 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 75 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 75 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 75 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 75 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 88 MCG TABLET 100 | “LEVO-THYROXINE (SYNTHETIC) TABLET 88 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
| THYROX 88 MCG TABLET 120 | “LEVO-THYROXINE (SYNTHETIC) TABLET 88 MCG” | MACLEODS PHARMACEUTICALS PVT.LTD |
Same brand name can cover different products — check your pack.
Pregnancy and breastfeeding: read the ingredient page
This page gives no pregnancy or breastfeeding verdict of its own. Talk to your doctor or pharmacist before taking Thyrox in pregnancy or while breastfeeding.
Sources
- Composition per NPPA Pharma Sahi Daam (National Pharmaceutical Pricing Authority, Government of India) data (Jul 2026): Pharma Sahi Daam, brand “THYROX”.
Sources checked 26 September 2026. How we source and check every page.
Educational information, not medical advice.