What is the recommended treatment for hives?

Treatment of Hives (Urticaria)

Start with a standard-dose second-generation H1-antihistamine (such as cetirizine, loratadine, fexofenadine, desloratadine, or levocetirizine) taken once daily, and if symptoms persist after 2-4 weeks, increase the dose up to 4-fold before considering other therapies. 1

First-Line Treatment: Second-Generation Antihistamines

The cornerstone of urticaria management is non-sedating H1-antihistamines 1. These medications are effective and safe, though not all patients respond equally 2.

Key antihistamine options include:

• Cetirizine, desloratadine, fexofenadine, levocetirizine, loratadine, mizolastine (once daily dosing)
• Offer patients a choice of at least two different antihistamines, as individual responses vary 2

Dose Escalation Strategy

If standard dosing provides inadequate control after 2-4 weeks (or earlier if symptoms are intolerable):

• Increase the antihistamine dose up to 4-fold the standard dose 1
• This updosing approach is common practice when benefits outweigh risks 2
• Higher doses may provide additional mast cell stabilization effects, particularly with cetirizine and loratadine 2

Important caveat: Cetirizine may cause sedation at higher doses 2. Adjust timing of medication to ensure peak drug levels coincide with when urticaria typically occurs 2.

Second-Line Treatment: Omalizumab

For patients with inadequate control despite maximized antihistamine therapy:

Add omalizumab 300 mg subcutaneously every 4 weeks 1. This anti-IgE monoclonal antibody is the recommended second-line therapy for chronic spontaneous urticaria 3, 4.

Omalizumab Optimization

• Allow up to 6 months for response assessment 1
• If insufficient response, consider updosing to 600 mg every 2 weeks 1
• Higher doses show similar safety profiles to standard dosing 1
• Approximately 40% of patients respond to antihistamines alone, while at least 30% have insufficient response to omalizumab 3

Third-Line Treatment: Cyclosporine

For patients failing both antihistamines and omalizumab:

Add cyclosporine up to 5 mg/kg body weight daily 1. This is particularly effective for autoimmune chronic spontaneous urticaria, with response rates of 54-73% 3.

Critical monitoring requirements:

• Check blood pressure and renal function (BUN, creatinine) every 6 weeks 1
• Watch for hypertension, hirsutism, gum hypertrophy, and potential renal failure 1
• The risk-benefit profile is less favorable than omalizumab, making it truly third-line 1

Adjunctive Therapies

H2-Antihistamines

Adding an H2-antihistamine to H1-antihistamine therapy may provide better control than H1-antihistamine alone 2, though this is often more helpful for accompanying dyspepsia.

Sedating Antihistamines at Night

Consider adding chlorphenamine 4-12 mg or hydroxyzine 10-50 mg at bedtime to help with sleep 2, though this provides minimal additional urticaria control if H1 receptors are already saturated.

Corticosteroids: Use With Caution

Short courses of systemic corticosteroids should be reserved for severe acute urticaria or chronic urticaria flares 2, 5. The evidence shows:

• For patients with low-to-moderate antihistamine response probability, corticosteroids provide a 14-15% absolute improvement (NNT=7) 5
• For patients with high antihistamine response probability (>95%), benefit drops to only 2.2% absolute improvement (NNT=45) 5
• Corticosteroids increase adverse events by 15% (NNH=9) 5
• Avoid prolonged use except for delayed pressure urticaria or urticarial vasculitis 2

Step-Down Approach

Once complete disease control is achieved (Urticaria Control Test score >16):

• Maintain complete control for at least 3 consecutive months before stepping down 1
• Reduce antihistamine dose by no more than 1 tablet per month 1
• If breakthrough symptoms occur, return to the last dose that provided complete control 1

General Measures

Avoid aggravating factors:

• Overheating, stress, alcohol
• Aspirin and NSAIDs (especially in aspirin-sensitive patients) 2
• ACE inhibitors if angioedema is present 2
• Codeine and other histamine-releasing drugs 2

Symptomatic relief: Cooling lotions like calamine or 1% menthol in aqueous cream can provide comfort 2.

Special Populations

Pregnancy: Avoid antihistamines when possible, especially first trimester. If necessary, chlorphenamine has the longest safety record in the UK 2. Loratadine and cetirizine are FDA Pregnancy Category B 2.

Renal impairment: Halve doses of cetirizine, levocetirizine, and hydroxyzine; avoid acrivastine in moderate impairment 2.

Hepatic impairment: Avoid mizolastine, alimemazine, chlorphenamine, and hydroxyzine in severe liver disease 2.

Common Pitfalls

• Don't rush to corticosteroids - the benefit is modest and adverse effects are common, particularly when antihistamine response probability is high 5
• Don't step down antihistamines too quickly - maintain control for 3 months minimum before dose reduction 1
• Don't give up on omalizumab too early - allow up to 6 months for response 1
• Don't forget monitoring with cyclosporine - renal function and blood pressure checks every 6 weeks are essential 1