Medications That Can Affect Fertility: What to Review Before Trying to Conceive

Why medications matter when planning pregnancy

Fertility depends on hormone balance, ovulation, sperm production, and a healthy uterine lining. Some drugs interfere with these processes directly; others pose risks if pregnancy occurs before you know. A preconception medication review — ideally 3 months before trying — is one of the highest-value steps you can take.

Medications women should discuss

• NSAIDs (ibuprofen, naproxen) — heavy use near ovulation may affect egg release in some studies; ask about acetaminophen alternatives for chronic pain
• Methotrexate — used for autoimmune conditions; must be stopped before pregnancy due to birth defect risk
• Retinoids (oral isotretinoin) — strict avoidance; wait per dermatologist guidance after stopping
• Certain blood pressure meds — ACE inhibitors/ARBs should be switched before pregnancy
• Antiseizure medications — some increase birth defect risk; neurologist may switch to safer options and add folic acid
• Psychiatric medications — balance mental health stability with pregnancy safety; do not stop without supervision
• Thyroid medication — under-treated hypothyroidism reduces fertility; overtreatment also causes problems — get TSH checked

Medications men should discuss

Fertility is not only a women's health topic. Partners should review:

• Finasteride / dutasteride (hair loss, prostate) — can affect sperm; may need months off before conception per specialist advice
• Testosterone replacement — suppresses sperm production; fertility often recovers after stopping under medical care
• Anabolic steroids — severely suppress sperm and hormones
• Some antibiotics and chemotherapy — temporary or permanent effects depending on drug and dose

Supplements: helpful vs. harmful

• Folic acid / prenatal vitamins — widely recommended before conception to reduce neural tube defect risk
• Vitamin D, iron — supplement only if deficient or advised
• High-dose vitamin A, weight-loss blends, bodybuilding supplements — avoid unless provider-approved
• Herbals (e.g. St. John's Wort) — can interact with contraception and other meds; disclose everything

Lifestyle factors that interact with meds

• Alcohol and smoking reduce fertility and increase pregnancy complications — quitting support helps outcomes
• Caffeine in very high amounts may be associated with lower fertility in some studies — moderation is reasonable
• Check interactions with our drug interaction checker before adding anything new

Practical preconception checklist

1. Schedule a preconception visit (or OB/GYN consult)
2. Bring a full medication + supplement list
3. Update vaccinations per provider guidance
4. Start prenatal vitamin with folic acid if recommended
5. Track cycles with our ovulation calculator to learn timing — not a substitute for medical fertility care
6. Consider our fertility calculator for age-related context only

When to seek fertility evaluation sooner

• Under 35 and trying 12+ months without success
• 35+ and trying 6+ months
• Irregular or absent periods, known endometriosis, PCOS, or prior pelvic surgery
• Partner with known sperm issues or prior cancer treatment