← Full anxiety and panic algorithm
Reasoning GP · Algorithm · 1-page summary

Anxiety and panic symptoms — adults

For: adults presenting with anxiety, worry or panic attacks in primary care. Not for: under 18s (CAMHS). First presentation, older age or abnormal observations: physical assessment first.
Reviewed October 2026 · next review April 2027
NICE CG113CG159CG31NG116
Core rule: a first "panic attack" is a diagnosis of exclusion — rule out the cardiac, endocrine and withdrawal emergency, ask about suicide, then name the specific disorder because each has its own psychological treatment.

0Stop — call 999 now — before any history

  • Chest pain with sweating, breathlessness or collapse → possible ACS or PE 999
  • Palpitations with syncope or compromise → arrhythmia 999
  • Severe tachycardia, fever, agitation in known or suspected hyperthyroidism → thyroid storm 999
  • Withdrawal with fitting or confusion, or immediate danger to life → 999

1Triage — pattern of the anxiety

PatternLikely disorder
Constant worryGAD — usually 6+ months, hard to control
Sudden attacksPanic disorder — peak within minutes, fear of further attacks
After traumaPTSD — re-experiencing, avoidance, hyperarousal
Thoughts + ritualsOCD — checking, washing, counting
Scrutiny or illness fearSocial anxiety; health anxiety

2Screen — one row is enough

  • Hypoglycaemia on insulin or a sulfonylurea → check glucose, treat Same-day
  • Alcohol or benzodiazepine withdrawal: tremor, sweating, hallucinations → Same-day medical assessment
  • Suicidal intent, a plan, or unable to stay safe → crisis team Same-day (NHS 111 option 2)
  • Psychotic symptoms or severe agitation → Same-day; consider stimulants
  • Safeguarding: domestic abuse, coercive control, children at home → Same-day

3Assess — targeted, not blanket

☐ Pulse rate and rhythm, BP, SpO₂, weight  ☐ Thyroid signs, heart, chest  ☐ Caffeine, alcohol, drugs, medicines (salbutamol, steroids, levothyroxine, stimulants)  ☐ Mood, suicide, past mania  ☐ GAD-7 as a measure

By indication: TSH, FBC, HbA1c/glucose, ECG for palpitations or chest symptoms; plasma metanephrines only for paroxysmal headache, sweating and palpitations with hypertension.

Avoid: repeated cardiac tests after normal results in clear health anxiety.

4Classify — only if the screen is negative

  • GAD or panic — stepped care: education and monitoring → self-help or groups → CBT/applied relaxation or SSRI.
  • Social anxiety — individual CBT (not group). OCD — CBT with exposure and response prevention.
  • PTSD — trauma-focused CBT or EMDR.
  • Physical cause — thyrotoxicosis, arrhythmia, hypoglycaemia, anaemia → treat the cause.
  • Substance-related — caffeine, alcohol, cannabis, stimulants → reduce or refer.
  • Uncertain — say so; Talking Therapies and review in 2–4 weeks.

5Treat today — doses: SPC, local formulary

  • All: explain the anxiety cycle; Talking Therapies self-referral; cut caffeine; review alcohol and drugs.
  • Marked impairment or preference: SSRI — sertraline, start 25–50 mg once daily, lower if panic is likely. Warn about jitteriness in the first 1–2 weeks.
  • Benzodiazepines: not for routine GAD or panic — crisis only, fixed small quantity. No antipsychotics.
  • Not routine: propranolol (not a NICE treatment, dangerous in overdose); pregabalin only if SSRIs and SNRIs cannot be tolerated.

6Refer routinely

  • Complex, refractory or high-risk (step 4) → community mental health.
  • Documented arrhythmia, confirmed thyrotoxicosis, suspected phaeochromocytoma → relevant specialty.
  • Dependence or withdrawal → drug and alcohol services.

7Never reassure by

  • Calling a first attack "panic" before an ECG when there is chest pain or syncope.
  • Normal observations in a person on insulin without a glucose check.
  • Missing morning-after alcohol withdrawal.
  • A benzodiazepine "to tide over" — linked to a less good long-term outcome in panic.
  • GAD-7 alone as the diagnosis.
  • Asking about anxiety but not about suicide.

8Safety-net — say it, then document it

999 “Call 999 for crushing or spreading chest pain, collapse, fainting with palpitations, severe breathlessness or a fit.” Same-day “If you have thoughts of ending your life or feel unable to stay safe, call NHS 111 option 2 today. Tell us the same day if you feel agitated after starting the tablet, get shakes and sweats after stopping alcohol or sleeping tablets, or the attacks feel different from usual.”

Follow-up: 1 week after an SSRI if under 30 or at increased risk; otherwise 1–2 weeks, then every 2–4 weeks for 3 months.

✓Safe to leave primary care only if — all five, documented

No block 0–2 row applies Physical causes considered; ECG/TSH if indicated Suicide and past mania asked Disorder named; stepped-care step agreed Safety-net given; review booked
Summary of the full Reasoning GP anxiety and panic algorithm, which holds the detail, examination, investigations and evidence. Sources: NICE CG113, CG159, CG31, NG116, NG225; NICE CKS; MHRA; sertraline SPC. Clinical reference — follow local pathways and check doses in the SPC and your local formulary.