Cipla Actin contains cyproheptadine 4 mg, a sedating antihistamine that also stimulates appetite. It is registered for allergies — hay fever, hives and itching — but in South Africa it is widely bought for weight gain, which is an off-label use with real risks.
What is Cipla Actin?
Cipla Actin contains cyproheptadine hydrochloride 4 mg, a first-generation antihistamine also sold as Actincypro, Periactin and Cypromin.
It blocks histamine H1 receptors, relieving the sneezing, itching, runny nose and weals that histamine produces in an allergic reaction. Like other first-generation antihistamines, it crosses readily into the brain and causes marked drowsiness.
Cyproheptadine also blocks serotonin receptors, and that second action is what sets it apart. Serotonin signalling in the hypothalamus contributes to feeling full; blocking it increases appetite. The result is that people taking cyproheptadine often eat more and gain weight.
That appetite effect is a side effect, not a licensed purpose in most contexts — and it is the reason Cipla Actin is one of the most talked-about medicines in South Africa. It is widely bought, shared and recommended informally as a “weight gain tablet”, frequently by people who have never spoken to a pharmacist about it.
This page covers both what it is registered for and what it is actually being used for, because the second is where people come to harm.
What is Cipla Actin commonly used for?
Registered allergy uses:
- Hay fever and allergic rhinitis — sneezing, runny nose, itchy eyes.
- Hives (urticaria) and allergic skin rashes.
- Itching from insect bites, eczema and other allergic skin conditions.
- Allergic conjunctivitis.
- Cold urticaria, where it is particularly effective.
Medically supervised appetite use:
- Appetite stimulation in specific clinical situations — failure to thrive in children, poor appetite in chronic illness, or during recovery from serious illness — prescribed and monitored by a doctor.
Other uses, in specialist hands: migraine prevention in children, and treatment of serotonin syndrome.
About using it for weight gain
The appetite effect is genuine, and weight gained this way is fat, not muscle, distributed wherever your body stores it — not shaped or targeted, whatever social media suggests.
Several things are worth knowing before deciding:
The drowsiness is substantial. Cyproheptadine is one of the more sedating antihistamines. Taken daily, it affects concentration, study, work and driving.
Unexplained weight loss or poor appetite has a cause worth finding. Thyroid disease, diabetes, HIV, tuberculosis, coeliac disease, depression and eating disorders all present this way, and several are common in South Africa. Stimulating appetite while leaving the cause untreated is the real risk here — not the tablet itself.
It is not for children without medical direction, and it is not appropriate in pregnancy.
If you want to gain weight, a pharmacist or doctor can help you do it in a way that is checked and safe. That conversation is worth having.
How Cipla Actin fits into this medicine category
| Group | Examples | Note |
|---|---|---|
| First-generation antihistamines | Cyproheptadine (Cipla Actin), chlorphenamine (Rhineton) | Effective; markedly sedating |
| Second-generation antihistamines | Cetirizine (Austell Cetirizine, Seasoneze), loratadine | Once daily; little drowsiness |
| Steroid nasal sprays | Fluticasone, mometasone | Best for nasal congestion |
| Decongestants | Pseudoephedrine | Short-term congestion only |
For allergy alone, a second-generation antihistamine is the better choice — same relief, without the sedation or the appetite effect. See the allergy, cold and flu medicines hub.
What to check before using Cipla Actin
Do not drive after taking it until you know how it affects you. The sedation is pronounced and can persist into the next morning.
Do not drink alcohol with it.
Speak to a pharmacist or doctor if:
- You are taking it for weight gain — genuinely worth a conversation, both about the cause of the weight loss and about whether this is the right approach.
- You have glaucoma, particularly narrow-angle.
- You have an enlarged prostate or difficulty passing urine.
- You have asthma, COPD or bronchitis — it thickens secretions and makes the chest harder to clear.
- You have epilepsy, heart disease, an overactive thyroid, or high blood pressure.
- You have liver or kidney disease.
- You are pregnant or breastfeeding. It is avoided in both.
- You are older, where confusion, falls and urinary retention are markedly more likely.
- The medicine is for a child, particularly under 2, where it should not be used without medical advice.
- You take an antidepressant, particularly an SSRI or MAOI, other sedating medicines, or another antihistamine.
- You are due allergy testing — antihistamines suppress skin prick tests.
Follow the pack instructions. This page does not set doses.
Possible cautions and when to ask a pharmacist or doctor
Expect drowsiness, dry mouth, blurred vision and constipation. These are the standard first-generation antihistamine effects, and they are more pronounced with cyproheptadine than with most.
Weight gained is not necessarily healthy weight. Rapid gain in fat, without any change in diet quality or activity, affects blood sugar, cholesterol and blood pressure over time.
Do not take it long term without review. If you are using it daily for months, a doctor should be involved — both to check what the weight loss was about and to monitor the effects of continued use.
In older adults, use a non-sedating alternative for allergy. Confusion, falls and urinary retention are real risks with this class.
Paradoxical excitement — restlessness or agitation rather than drowsiness — occurs in some children.
It does not treat a cold, which is viral, and it is not a substitute for an asthma inhaler.
Seek urgent medical attention for swelling of the face, lips, tongue or throat, difficulty breathing, wheezing, or faintness with a widespread rash. Also seek attention for eye pain with blurred vision or halos, inability to pass urine, palpitations, confusion, or a seizure. See a doctor about unexplained weight loss, ongoing poor appetite, or any weight change you cannot account for.
Related medicine guides
Frequently asked questions
What is Cipla Actin used for? It is registered for allergies — hay fever, hives and itching. It contains cyproheptadine, which also stimulates appetite, and is widely used in South Africa for weight gain.
Does it really make you gain weight? It increases appetite by blocking serotonin receptors, so most people eat more and gain weight. The gain is fat, not muscle, and is not targeted to particular areas.
Is it safe to take for weight gain? Speak to a pharmacist or doctor first. The main risk is not the tablet but stimulating appetite while an untreated cause of weight loss — thyroid disease, diabetes, TB, HIV, depression — goes unaddressed.
Will it make me drowsy? Yes, markedly. Do not drive after taking it, and the effect can persist into the next morning.
Can I give it to my child? Not without medical advice. It should not be used in children under 2, and appetite problems in a child need proper assessment.
Is there a better option for my allergies? For allergy alone, yes — a second-generation antihistamine such as cetirizine or loratadine gives the same relief without the sedation or appetite effect.