Complete Guide to Phenergan Side Effects
Common Side Effects of Phenergan
The most frequently reported side effects of Phenergan tablets and elixir include drowsiness, which affects most users due to its sedating antihistamine properties. Dry mouth occurs as promethazine blocks muscarinic receptors, reducing saliva production. Dizziness and blurred vision may also develop, particularly when starting treatment or increasing doses.
Other common reactions include constipation, difficulty urinating, and mild headache. These anticholinergic effects typically diminish as your body adjusts to the medication. EverydayMeds customers using Phenergan 25mg tablets often report these effects are more pronounced initially.
Serious Side Effects Requiring Medical Attention
Whilst uncommon, serious side effects can occur with Phenergan. Severe allergic reactions may present as facial swelling, difficulty breathing, or widespread rash. Contact emergency services immediately if these symptoms develop.
Movement disorders, though rare, include involuntary muscle spasms or tremors, particularly with prolonged use. Yellowing of skin or eyes could indicate liver problems, whilst irregular heartbeat or severe dizziness when standing may signal cardiovascular effects.
Confusion, particularly in elderly patients, warrants medical review. The Phenergan elixir available through EverydayMeds allows for more precise dose adjustments in sensitive individuals.
Managing and Minimising Side Effects
Starting with the lowest effective dose helps reduce side effect intensity. Take Phenergan tablets with food to minimise stomach upset. Avoid alcohol, which can intensify drowsiness and increase fall risk.
Stay hydrated to combat dry mouth, and use sugar-free gum or lozenges to stimulate saliva production. Rise slowly from sitting or lying positions to prevent dizziness. If constipation develops, increase fluid intake and dietary fibre.
Special Considerations and Warnings
Children are more susceptible to Phenergan side effects, particularly movement disorders and breathing problems. Never give to children under 6 years without medical supervision. The 5mg/5ml elixir formulation from EverydayMeds allows for paediatric dosing when appropriate.
Elderly patients face increased risks of falls due to sedation and may experience more pronounced anticholinergic effects. Consider starting with half the standard adult dose.
Pregnancy considerations include potential respiratory depression in newborns when used near delivery. Breastfeeding mothers should be aware that promethazine passes into breast milk.
When to Seek Medical Advice
Contact your healthcare provider if side effects persist beyond the first week of treatment or worsen over time. Severe drowsiness affecting daily activities, persistent headaches, or any movement abnormalities require medical review.
Report any signs of allergic reaction, irregular heartbeat, or breathing difficulties immediately. If you experience mood changes, confusion, or severe stomach pain, discontinue use and seek medical advice.
