Answer
There is insufficient information to determine whether guaifenesin in Benylin Chesty Coughs (Non-Drowsy) has the potential to impair fertility.
Sources for this answer
- Benylin Chesty Coughs (Non-Drowsy) and Benylin Mucus CoughMcNeil Products Ltd · emc · SmPC §4.6 Fertility, pregnancy and lactation · Version 20Document updated
Sources checked