Maximum Flu Strength (Phenylephrine Hydrochloride, Paracetamol, Caffeine Citrate)

Maximum Flu Strength combines a decongestant, analgesic and stimulant to address symptoms of upper respiratory infections.

• Nasal congestion: reduces swelling of nasal mucosa and eases breathing.
• Fever: lowers elevated body temperature.
• Headache and body aches: alleviates pain and discomfort linked to cold or flu.

• Phenylephrine acts as an alpha‑adrenergic agonist causing vasoconstriction of nasal mucosal vessels, which diminishes congestion. Paracetamol inhibits central cyclo‑oxygenase enzymes, providing analgesic and antipyretic effects. Caffeine antagonises adenosine receptors, offering mild central nervous system stimulation and enhancing the analgesic action of paracetamol.

Maximum Flu Strength may cause a range of adverse reactions.

Common Side Effects

• Nausea: mild stomach upset.
• Dizziness: transient light‑headedness.
• Insomnia: difficulty falling asleep.
• Headache: mild to moderate pain.
• Palpitations: awareness of heartbeat.
• Dry mouth: reduced salivation.

Serious or Rare Side Effects

• Anaphylaxis: severe allergic reaction with rash, swelling, or breathing difficulty.
• Hypertension: significant increase in blood pressure.
• Liver injury: elevated liver enzymes or jaundice.
• Cardiac arrhythmia: irregular heart rhythm.
• Severe skin reactions: Stevens‑Johnson syndrome or toxic epidermal necrolysis.

Before using Maximum Flu Strength, consider the following safety measures.

• Cardiovascular assessment: evaluate blood pressure and heart conditions.
• MAO inhibitor use: avoid concurrent use with monoamine oxidase inhibitors.
• Paracetamol limit: do not exceed total daily paracetamol dose from all sources.
• Hypertension caution: monitor blood pressure in patients with known hypertension.
• Pediatric use: avoid in children under the age recommended on the label.
• Store at ambient temperature: keep in the original pack, protect from moisture.

Maximum Flu Strength can interact with other medicines; some combinations should be avoided while others require monitoring.

Major Interactions (Avoid)

• MAO inhibitors: risk of hypertensive crisis.
• Other sympathomimetic decongestants: may cause excessive vasoconstriction.
• Additional paracetamol‑containing products: risk of hepatotoxicity.
• Anticoagulants (e.g., warfarin): may increase bleeding risk.
• Monoamine‑oxidase inhibitors: severe cardiovascular effects.

Moderate Interactions (Monitor Closely):\n- Caffeine‑rich beverages or supplements: may enhance stimulant effects.

• Antihypertensive agents: phenylephrine may reduce their efficacy.
• Antidepressants (SSRIs, SNRIs): possible increase in blood pressure.
• Alcohol: may increase liver strain.
• Diuretics: potential for electrolyte imbalance.