What's the difference between generic and brand-name drugs?
Last updated September 3, 2026.
Price and packaging, not power: the FDA requires generics to carry the same active ingredient, strength, form, and effect as the brand, proven through bioequivalence - the same amount of drug reaching your blood on the same time course - and held to the same quality standards. What differs: the name, the look (trademark law blocks copying), the inactive fillers, and the cost - generics skip the decade of original trials. When brand matters: narrow-therapeutic-index drugs (levothyroxine, warfarin, some seizure medicines) - the rule there is consistency: pick one manufacturer and stay. A switch that feels different deserves a mention - usually look or fillers, but the conversation is free. Pymander is a free AI doctor, 24/7 by text, and can help you think through a switch.
What to do
- Take the generic confidently: same drug, smaller bill.
- Narrow-index drugs: stay with one maker: consistency over shopping.
- Feels different after a switch? Say so: quick check, real answers.
- Allergies? Check inactive ingredients: the one real difference.
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