Zoloft
In brief
- Zoloft (sertraline) is a prescription-only medicine (POM) in the UK. It is used for depression, obsessive compulsive disorder, panic disorder, social anxiety disorder and post-traumatic stress disorder.
- Zoloft is a selective serotonin reuptake inhibitor (SSRI). It works by increasing serotonin levels in the brain, which helps improve mood, reduce anxiety, and lessen obsessive or panic symptoms.
- The usual dose depends on the condition: for depression and OCD, 50 mg once daily is typical; for panic disorder, PTSD, and social anxiety, treatment often starts at 25 mg daily and increases to 50 mg daily; the usual range is 50–200 mg daily. The maximum daily dose is usually 200 mg.
- Zoloft is taken by mouth as film-coated tablets in 25 mg, 50 mg, and 100 mg strengths, or as an oral concentrate/solution 20 mg/mL that must be diluted before use.
- It usually starts to work within 1–4 weeks, although some people may notice early improvement in symptoms sooner.
- The duration of action is about 24 hours, so it is usually taken once daily. For best results, treatment is often continued for several weeks to months, and sometimes longer to prevent relapse.
- Alcohol is not recommended while taking Zoloft, as it may worsen drowsiness, dizziness, and impaired concentration, and can also aggravate depression or anxiety symptoms.
- The most common side effects include nausea, diarrhoea, dry mouth, headache, dizziness, insomnia or drowsiness, sweating, tremor, fatigue, and sexual problems such as decreased libido or delayed ejaculation.
- Would you like to try Zoloft without a prescription?
Basic Zoloft information
- INN (international nonproprietary name): Sertraline
- Brand names available in the United Kingdom: Lustral (Pfizer); generic sertraline. Zoloft is the original brand name
- ATC code: N06AB06
- Forms and dosages: tablets 25 mg, 50 mg, 100 mg; oral solution/concentrate 20 mg/mL, 60 mL multidose bottle
- Manufacturers in the United Kingdom: Pfizer (Lustral); generics from companies such as Teva, Sandoz and Accord
- Registration status in the United Kingdom: Licensed by the MHRA; prescription-only medicine
- OTC / Rx classification: Prescription-only medicine (POM)
Legal status and availability in the UK
Zoloft (sertraline) is a prescription-only medicine (POM) in the UK.
In our online pharmacy, Zoloft is available without a prescription, with discreet delivery to the United Kingdom in 9–21 days.
Zoloft and generic sertraline
Zoloft is the branded name from Pfizer, while sertraline is the INN used on UK prescriptions and pharmacy labels.
Generics are widely available, and packaging may vary by brand and supplier, which is why one box may look different from another even when the active ingredient is the same.
Starting treatment
Someone starting sertraline 50 mg tablet for the first time usually wants a quick fix, but this medicine tends to work gradually.
Common questions are whether it should be taken in the morning or evening, how long nausea lasts, and when the mood lift will begin.
Most people notice benefit over time rather than straight away, so planning for the first few weeks matters.
- It is prescription only in the UK.
- Start-up effects may feel different from the eventual therapeutic benefit.
- Box design and blister format can vary.
- Pharmacist advice is useful when switching between products.
What Zoloft is
- International nonproprietary name
- Sertraline, the medicine name used on prescriptions.
- Brand name
- Zoloft, the originator brand from Pfizer.
- SSRI
- Selective serotonin reuptake inhibitor, the antidepressant classification.
- ATC code
- N06AB06, the code used to classify sertraline.
In practice, the sertraline tablet is chosen because it is familiar, widely used, and available in strengths that suit titration.
Doctors and pharmacists often prefer it when a patient needs an SSRI antidepressant with established dosing patterns and widely recognised monitoring points.
Forms, strengths and packaging
| Form | Strength | Typical packaging notes |
|---|---|---|
| Tablet | 25 mg | Film-coated, scored; packaging varies by supplier |
| Tablet | 50 mg | Common sertraline 50 mg tablet format in blister packs |
| Tablet | 100 mg | Often supplied as a scored tablet; carton and blisters can differ |
| Oral solution / concentrate | 20 mg/mL | 60 mL bottle; must be diluted before use |
Blister pack antidepressant formats are common, although boxed bottles are also seen with oral concentrate.
Who Zoloft is used for: common indications and what patients notice first
- Depression: Major depressive disorder is usually started at 50 mg once daily, and people often notice gradual improvement rather than immediate relief.
- Anxiety-related conditions: Sertraline for anxiety is commonly started at a lower dose in panic disorder, PTSD, and social anxiety, usually 25 mg before titration.
- OCD: Obsessive compulsive disorder also uses 50 mg once daily as a standard starting point.
Effects are often seen in 1 to 4 weeks, but the full benefit can take longer, especially if the dose has to be adjusted for tolerability.
People who expect immediate relief can feel disappointed in week one, so clear counselling is important.
Dosing basics: starting doses, titration and maximum daily dose
| Indication | Initial dose | Typical range | Maximum dose |
|---|---|---|---|
| MDD | 50 mg once daily | 50–200 mg/day | 200 mg |
| OCD | 50 mg once daily | 50–200 mg/day | 200 mg |
| Panic disorder, PTSD, social anxiety | 25 mg start | 50–200 mg/day | 200 mg |
Doctors often start low when the person is sensitive to side effects, because a gentle start can improve adherence.
Sertraline dosage is then increased in steps if symptoms are not controlled and the medicine is well tolerated.
The maximum sertraline dose is 200 mg daily.
Special populations: children, older adults, liver and kidney considerations
- Children
- For OCD in ages 6 to 12 years, start at 25 mg daily and titrate carefully; do not exceed 200 mg.
- Older adults
- Elderly patients may be more sensitive to adverse effects, so the lowest effective dose is usually preferred.
- Liver impairment
- Reduce the dose or increase the dosing interval because clearance is reduced and accumulation can occur.
- Renal impairment
- No specific adjustment is required, but caution is sensible in severe impairment.
Sertraline in children is reserved for appropriate indications, and sertraline dose decisions in older adults are usually more cautious.
A pharmacist should also check whether the person has liver impairment antidepressant concerns before supply or counselling.
How to take Zoloft safely: tablets, concentrate and missed doses
- Take tablets as directed, usually once daily, with or without food.
- If using the oral solution, remember that the concentrate is 20 mg/mL and must be diluted before use.
- Store the medicine in original packaging where possible, especially when travelling.
- If a dose is missed, take it as soon as possible unless the next dose is near.
- Do not double the next dose if one is forgotten.
How to take sertraline safely depends on the form supplied, and sertraline oral solution needs extra care because the liquid is not meant to be taken neat.
Missed dose Zoloft advice is straightforward, but it is still worth repeating because doubling up increases the risk of side effects without adding benefit.
Do not forget transport rules for prescription medicines, especially on flights or long journeys.
Common side effects
| Type | Examples |
|---|---|
| Common | Nausea, diarrhoea, dyspepsia, dry mouth, insomnia, drowsiness, headache, tremor, dizziness, sweating, fatigue, agitation, weight changes |
| Less common but important | Decreased libido, delayed ejaculation, anorgasmia |
| Red flags | Severe agitation, worsening mood, or symptoms suggesting overdose (needs urgent clinical review) |
Sertraline side effects are often mild to moderate, and many settle as the body adjusts.
Zoloft nausea is a frequent early complaint, and SSRI sexual side effects should be discussed openly so the person knows what to expect.
Warnings, contraindications and drug interaction risks
- Do not use with MAOIs.
- Do not use with pimozide.
- Do not use with disulfiram if the concentrate is being taken.
- Do not use if there is known hypersensitivity to sertraline or excipients.
- Do not use in children under 6 years because safety data are lacking.
| Interaction area | Why it matters |
|---|---|
| MAOI and sertraline | High-risk combination that must be avoided. |
| Bleeding risk medicines | May need caution in people with bleeding disorders. |
| Bipolar disorder | Mania risk means close assessment is needed. |
| Severe hepatic impairment | Reduced clearance can increase accumulation. |
Sertraline interactions should always be checked at the point of supply, especially where the person is already taking multiple medicines.
Zoloft contraindications are not limited to a single label warning, so a pharmacist should ask about seizure disorders, pregnancy, lactation, and any current antidepressant use.
Overdose and urgent action
Alert: Somnolence, vomiting, tachycardia, agitation and nausea can occur in sertraline overdose.
There is no specific antidote, so urgent medical assessment is needed and treatment is supportive.
If a person has taken too much sertraline, emergency advice antidepressant steps should be followed immediately and the pack should be taken along for reference.
Sertraline overdose is not something to watch and wait on at home; seek medical help promptly (NHS 111, or 999 in an emergency).
Storage, travel and handling
- Store at 20 to 25°C, away from moisture and excess heat.
- Protect the oral concentrate from light.
- Always dilute the concentrate before use.
- Keep medicines in the original packaging for transport where possible.
- Follow prescription-drug rules when travelling within or outside the UK.
Mini storage note: antidepressant storage is usually simple, but light protection matters more for the oral concentrate than for tablets.
Zoloft travel planning is easier when the box and label are kept intact.
Zoloft compared with generic sertraline
| Option | What stays the same | What may change |
|---|---|---|
| Zoloft | Sertraline as the active ingredient | Brand presentation, carton design, supplier |
| Generic sertraline | Same INN and strength when matched correctly | Packaging, excipients, colour, and manufacturer |
Zoloft vs sertraline is mainly a question of brand preference, supplier, and stock, not a different active drug.
Checking your supply
People often ask what should be checked on the label, and the answer is simple: strength, form, patient name, and directions for use.
UK pharmacy sertraline supply may switch between brand and generic depending on stock, so brand substitution should be discussed if the prescriber has not required one specific product.
Delivery across the United Kingdom
| City | Region | Delivery time |
|---|---|---|
| London | England | 9–21 days |
| Birmingham | England | 9–21 days |
| Manchester | England | 9–21 days |
| Leeds | England | 9–21 days |
| Liverpool | England | 9–21 days |
| Glasgow | Scotland | 9–21 days |
| Edinburgh | Scotland | 9–21 days |
| Cardiff | Wales | 9–21 days |
| Belfast | Northern Ireland | 9–21 days |
| Sheffield | England | 9–21 days |
| Bristol | England | 9–21 days |
| Nottingham | England | 9–21 days |
| Newcastle upon Tyne | England | 9–21 days |
| Leicester | England | 9–21 days |
