Like all medicine, Minoxidil 5%w/v cutaneous solution can cause side effects.
The most frequently notified adverse reactions are itching (burning), dermatitis (reddening), dryness, irritation, eczema, and hypertrichosis (growth of hair on skin) which are generally of light-moderate intensity and disappear upon suspending treatment.
Nervous system disorders: Uncommon (≥1/1,000, <1/100): headache, paresthesia (feeling of numbness in arms and legs).
Eye disorders: Very rare (<1/10,000): alteration of sight and irritation.
Heart disorders: Uncommon (≥1/1,000, <1/100): tachycardia, palpitations, hypotension (lowering of blood pressure).
Skin and subcutaneous disorders: Common (≥1/100, <1/10): itching (burning), local irritation, contact dermatitis (reddening), dryness, and desquamation (flaking).
Uncommon (≥1/1,000, <1/100): erythematic rash (generalised reddening), eczema, alopecia, hypertrichosis (growth of hair and skin).
Rare (≥1/10,000, <1/1,000): pustular rash (generalised pustules) and acne.
If the patient notices these or any other side effects not listed, please tell the doctor or pharmacist.