What it's used for
Ampicillin is an antibiotic used to treat bacterial infections. It is recommended for treating infections proven or strongly suspected to be caused by susceptible bacteria.
Source: U.S. FDA-approved prescribing information (openFDA).
Typical dosing
For adults and children over 20 kg, the usual dose for genitourinary or gastrointestinal infections is 500 mg four times daily in equally spaced doses.
Dosing shown here is the general FDA-labeled range. Your prescribing clinician determines the exact dose, form, and schedule for you — this is not a substitute for medical advice.
Boxed warning / key safety info
Serious and sometimes fatal allergic reactions have been reported in patients receiving penicillin therapy.
Common side effects
Untoward reactions are essentially limited to sensitivity phenomena, especially in individuals with a history of allergies or penicillin hypersensitivity.
Covered strengths on the Tab $0 list
Covered at $0 with an active Tab membership when filled at a participating pharmacy nationwide or through mail order. A licensed clinician must prescribe the medication.
Related medications
Other antibiotics & antivirals medications covered at $0 with an active Tab membership.
Ampicillin Trihydrate cost without insurance
Cash prices for Ampicillin Trihydrate without insurance vary widely by pharmacy, strength and quantity — the same prescription can cost very different amounts at two pharmacies in the same town. That is the problem a membership solves.
Ampicillin Trihydrate is on Tab's covered $0 generic list. With an active Tab membership, every covered strength is $0 — not a percentage off, not a coupon that changes month to month — at participating pharmacies nationwide or through mail order. You do not need insurance, and Tab works whether or not you have a health plan.
Tab is a membership, not insurance. Covered medications require a prescription from a licensed clinician.
Common questions
Is ampicillin Trihydrate covered at $0 with Tab?
Yes. Ampicillin Trihydrate is on Tab's covered $0 generic list — every covered strength is $0 with an active membership, at participating pharmacies nationwide or by mail order.
Do I need insurance to get ampicillin Trihydrate through Tab?
No. Tab is a membership, not insurance. Covered medications are $0 with an active membership whether or not you have a health plan.
How do I get an ampicillin Trihydrate prescription with Tab?
Book a video visit with a licensed Tab clinician (unlimited visits are included with membership). If it's clinically appropriate, they send the prescription to your chosen participating pharmacy or by mail order.
How much does ampicillin trihydrate cost without insurance?
Without insurance, retail cash prices for ampicillin trihydrate vary by pharmacy, strength and quantity. Ampicillin Trihydrate is on Tab's covered $0 generic list, so every covered strength is $0 with an active Tab membership at participating pharmacies nationwide or by mail order.
What is the cheapest way to get ampicillin trihydrate?
For medications on Tab's covered list, a Tab membership is the cheapest route: covered strengths of ampicillin trihydrate are $0 with an active membership, and unlimited video visits with a licensed clinician are included, so the visit that produces the prescription is covered too.
Ampicillin Trihydrate is $0 on the covered list
Members pay $0 for covered generics at participating pharmacies nationwide or by mail order — plus unlimited virtual primary care, urgent care and dermatology visits. No insurance needed.
Solo $49/mo · Family $119/mo for up to 4 people · Family+ $149/mo for up to 8
Start your membership → Compare plansTab is a membership and prescription-discount program, not insurance. A licensed clinician must prescribe any medication. Cancel anytime — no renewal.